{"id":7309,"date":"2026-06-20T04:21:39","date_gmt":"2026-06-20T04:21:39","guid":{"rendered":"http:\/\/australianholden.com\/?p=7309"},"modified":"2026-06-21T12:32:10","modified_gmt":"2026-06-21T12:32:10","slug":"powerglide-trimatic-issues-explained","status":"publish","type":"post","link":"https:\/\/australianholden.com\/index.php\/2026\/06\/20\/powerglide-trimatic-issues-explained\/","title":{"rendered":"Powerglide &amp; Trimatic Issues Explained"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">For Australian Holden enthusiasts, few automatic transmissions are as familiar as the Powerglide and Trimatic. These gearboxes powered everything from HK Monaros and Kingswoods through to Toranas, Commodores and countless street machines. Both earned reputations for durability, simplicity and ease of maintenance, but after decades of service, even the toughest transmission develops problems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you&#8217;re restoring an original HK Holden, maintaining a weekend cruiser, or diagnosing issues in a modified classic, understanding the common faults of both the Powerglide and Trimatic can save significant time and money.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Understanding the Differences<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Before discussing failures, it&#8217;s worth understanding the differences between the two transmissions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Powerglide<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Originally introduced by General Motors in the 1950s, the Powerglide is a two-speed automatic transmission renowned for its simplicity.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Extremely durable<\/li>\n\n\n\n<li>Simple internal design<\/li>\n\n\n\n<li>Strong aftermarket support<\/li>\n\n\n\n<li>Popular in drag racing applications<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Weaknesses<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Limited gear ratios<\/li>\n\n\n\n<li>Slower acceleration compared to later automatics<\/li>\n\n\n\n<li>Less efficient cruising<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Trimatic<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Introduced in the late 1960s and widely used throughout the 1970s and 1980s, the Trimatic was Holden&#8217;s answer to improving performance and fuel economy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Advantages<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Three forward gears<\/li>\n\n\n\n<li>Better acceleration<\/li>\n\n\n\n<li>Improved drivability<\/li>\n\n\n\n<li>More efficient cruising<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Weaknesses<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>More complex than Powerglide<\/li>\n\n\n\n<li>Greater sensitivity to maintenance neglect<\/li>\n\n\n\n<li>Additional wear points<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Slipping Gears<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Gear slip is one of the most common problems affecting both transmissions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Engine revs increase without vehicle acceleration<\/li>\n\n\n\n<li>Delayed engagement<\/li>\n\n\n\n<li>Poor performance under load<\/li>\n\n\n\n<li>Difficulty climbing hills<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn clutch packs<\/li>\n\n\n\n<li>Internal seal failure<\/li>\n\n\n\n<li>Low hydraulic pressure<\/li>\n\n\n\n<li>Old or contaminated transmission fluid<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Slipping is usually progressive rather than sudden, providing warning before major failure occurs.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Transmission Fluid Upgrade<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Penrite ATF FS Full Synthetic<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved shift quality<\/li>\n\n\n\n<li>Better heat resistance<\/li>\n\n\n\n<li>Enhanced lubrication<\/li>\n\n\n\n<li>Longer transmission life<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Powerglide servicing<\/li>\n\n\n\n<li>Trimatic maintenance<\/li>\n\n\n\n<li>Modified vehicles<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_0\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 0 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_0\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Penrite ATF FS Full Synthetic<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_0 = null;\nvar waitForDepends_fu_ebay_0 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_0);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_0 = jQuery(\"#fu_ebay_0\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Penrite ATF FS Full Synthetic\",\nfu_ebay_query : \"Penrite ATF FS Full Synthetic\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 0,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_0.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Delayed Drive or Reverse Engagement<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A healthy transmission should engage gear almost immediately.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Long delay selecting Drive<\/li>\n\n\n\n<li>Reverse engages slowly<\/li>\n\n\n\n<li>Vehicle hesitates before moving<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internal hydraulic leaks<\/li>\n\n\n\n<li>Valve body wear<\/li>\n\n\n\n<li>Pump wear<\/li>\n\n\n\n<li>Low fluid levels<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This problem is especially common in high-mileage Trimatics.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Harsh or Erratic Shifting<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Both Powerglide and Trimatic units can develop poor shift quality.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sudden gear changes<\/li>\n\n\n\n<li>Harsh engagement<\/li>\n\n\n\n<li>Inconsistent shifting<\/li>\n\n\n\n<li>Jerking during acceleration<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dirty valve body<\/li>\n\n\n\n<li>Worn governor components<\/li>\n\n\n\n<li>Incorrect linkage adjustment<\/li>\n\n\n\n<li>Fluid contamination<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trimatics are generally more susceptible due to their additional gear and more complex hydraulic circuits.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Transmission Service Product<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Nulon Automatic Transmission Flush<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Removes varnish deposits<\/li>\n\n\n\n<li>Cleans valve body passages<\/li>\n\n\n\n<li>Improves hydraulic performance<\/li>\n\n\n\n<li>Restores shift quality<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Preventative maintenance<\/li>\n\n\n\n<li>Light transmission servicing<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_1\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 1 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_1\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Nulon<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_1 = null;\nvar waitForDepends_fu_ebay_1 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_1);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_1 = jQuery(\"#fu_ebay_1\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Nulon\",\nfu_ebay_query : \"Nulon Automatic Transmission \",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 1,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_1.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Fluid Leaks<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Oil leaks are extremely common in ageing automatic transmissions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fluid spots under vehicle<\/li>\n\n\n\n<li>Low fluid levels<\/li>\n\n\n\n<li>Burning transmission smell<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Leak Points<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Front pump seal<\/li>\n\n\n\n<li>Tailshaft seal<\/li>\n\n\n\n<li>Selector shaft seal<\/li>\n\n\n\n<li>Transmission pan gasket<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Even small leaks can eventually lead to major internal damage.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Seal Repair Kit<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Permaseal Transmission Rebuild Gasket Kit<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Comprehensive sealing solution<\/li>\n\n\n\n<li>Reduces fluid loss<\/li>\n\n\n\n<li>Extends transmission lifespan<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leak repairs<\/li>\n\n\n\n<li>Transmission rebuilds<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_2\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 2 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_2\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Gasket<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_2 = null;\nvar waitForDepends_fu_ebay_2 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_2);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_2 = jQuery(\"#fu_ebay_2\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Gasket\",\nfu_ebay_query : \"Holden Transmission Gasket Kit\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 2,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_2.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Overheating Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Heat is the number one killer of automatic transmissions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Burnt fluid smell<\/li>\n\n\n\n<li>Slipping when hot<\/li>\n\n\n\n<li>Reduced shift quality<\/li>\n\n\n\n<li>Dark transmission fluid<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Common Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Heavy towing<\/li>\n\n\n\n<li>Modified engines<\/li>\n\n\n\n<li>Inadequate cooling<\/li>\n\n\n\n<li>Old fluid<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Heat dramatically shortens clutch and seal life.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Transmission Cooler Upgrade<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Tridon Transmission Cooler Kit<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduces fluid temperature<\/li>\n\n\n\n<li>Extends transmission life<\/li>\n\n\n\n<li>Improves reliability<\/li>\n\n\n\n<li>Protects clutch packs<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Touring vehicles<\/li>\n\n\n\n<li>Modified Holdens<\/li>\n\n\n\n<li>Heavy-duty applications<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_3\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 3 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_3\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Tridon Transmission Cooler Kit<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_3 = null;\nvar waitForDepends_fu_ebay_3 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_3);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_3 = jQuery(\"#fu_ebay_3\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Tridon Transmission Cooler Kit\",\nfu_ebay_query : \"Tridon Transmission Cooler \",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 3,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_3.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Torque Converter Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The torque converter is often overlooked during diagnosis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Poor acceleration<\/li>\n\n\n\n<li>Shudder during take-off<\/li>\n\n\n\n<li>Vibration at idle<\/li>\n\n\n\n<li>Slipping under load<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Internal converter wear<\/li>\n\n\n\n<li>Contaminated fluid<\/li>\n\n\n\n<li>Stator failure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Converter issues are often mistaken for engine or gearbox faults.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Trimatic Governor Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">One issue unique to the Trimatic is governor wear.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Late shifts<\/li>\n\n\n\n<li>Early shifts<\/li>\n\n\n\n<li>Inconsistent shift points<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Governor gear wear<\/li>\n\n\n\n<li>Sticky governor weights<\/li>\n\n\n\n<li>Internal contamination<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The governor plays a critical role in controlling shift timing.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Powerglide Low Gear Issues<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Although extremely strong, Powerglides can develop low gear engagement problems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Poor launch performance<\/li>\n\n\n\n<li>Delayed first gear operation<\/li>\n\n\n\n<li>Inconsistent low gear hold<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Band wear<\/li>\n\n\n\n<li>Servo issues<\/li>\n\n\n\n<li>Hydraulic pressure loss<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Fortunately, repairs are usually straightforward.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Best Transmission Pressure Testing Tool<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Product: Hydraulic Transmission Pressure Test Kit<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Benefits<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Accurate diagnosis<\/li>\n\n\n\n<li>Identifies pump issues<\/li>\n\n\n\n<li>Helps locate internal faults<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Best For<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DIY mechanics<\/li>\n\n\n\n<li>Restoration workshops<\/li>\n\n\n\n<li>Transmission troubleshooting<\/li>\n<\/ul>\n\n\n<div id=\"fu_ebay_4\"><!-- Presentation: cols = 4, rows = 2, slideshow = Manual, slides = 3, slideId = 4 --><div class=\"fu_ebay_results_container \">\n<h5 class=\"fu_ebay_results_title\" style=\"display: block !important;\">\n<a name=\"fu_slidetop_4\"><\/a><a href=\"https:\/\/www.ebay.com.au\/?mkcid=1&#038;mkrid=705-53470-19255-0&#038;siteid=15&#038;campid=5339152561&#038;customid=5339151688&#038;toolid=10049&#038;mkevt=1\" class=\"fu_ebay\" style=\"display:inline !important;\" rel=\"nofollow\" target=\"_blank\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/australianholden.com\/wp-content\/plugins\/fast-ebay-listings\/US\/Right_Now_108x45.gif?resize=108%2C45&#038;ssl=1\" style=\"border:0;display:block !important;\" width=\"108\" height=\"45\" alt=\"Right Now on eBay\"\/><\/a>&nbsp;Hydraulic Transmission Pressure Test Kit<\/h5>\nLoading&#8230;<\/div>\n<\/div>\n<script>\n<!--\nvar content_fu_ebay_4 = null;\nvar waitForDepends_fu_ebay_4 = setInterval(function () {\n  if (typeof jQuery !== \"undefined\") {\n  if (window.fu_is_bot_useragent !== undefined) {\n    clearInterval(waitForDepends_fu_ebay_4);\n    if (typeof jQuery.ajax == \"undefined\") {\n      console.log(\"Fast eBay Listings: jQuery.ajax missing. Are you using jQuery.Slim that doesn't include ajax? \");\n      return;\n    }\n    if (fu_is_bot_useragent) return;\n    content_fu_ebay_4 = jQuery(\"#fu_ebay_4\");\n    jQuery(document).ready(jQuery.ajax({\n      type : \"post\",\n      url : \"https:\/\/australianholden.com\/wp-admin\/admin-ajax.php\",\n      data : {\n        action : \"fu_ebay_load_search\",\nfuDisableAPICache : 0,\nfuTraceLogging : 0,\nebay_country : \"AU\",\nfu_ebay_customId : \"\",\nfu_ebay_widget : 0,\nfu_ebay_picwidth : 225,\nfu_ebay_arrangement : 0,\nfu_ebay_title : \"Hydraulic Transmission Pressure Test Kit\",\nfu_ebay_query : \"Transmission Pressure Test Kit\",\nfu_ebay_searchInDesc : 0,\nfu_ebay_searchLocation : \"Internationally\",\nfu_ebay_pickupPostcode : \"\",\nfu_ebay_pickupRadius : 0,\nfu_ebay_sort : \"BestMatch\",\nfu_ebay_categoryIds : \"6030\",\nfu_ebay_sellers : \"\",\nfu_ebay_sellerType : \"\",\nfu_ebay_buyingOptions : \"\",\nfu_ebay_conditionOptions : \"\",\nfu_ebay_minPrice : 0,\nfu_ebay_maxPrice : 0,\nfu_ebay_minBids : 0,\nfu_ebay_maxBids : 0,\nfu_cols : 4,\nfu_rows : 2,\nfu_slideshow : \"Manual\",\nfu_slides : 3,\nfu_slideId : 4,\n\n      },\n      success : function( response ) {\n        content_fu_ebay_4.html( response );\n      },\n      error: function(e) {\n        console.log(\"Fast eBay Listings: deferred loading error: \" + e);\n      }\n    }));\n  }}\n}, 10);\n\/\/-->\n<\/script>\n\n\n\n<h1 class=\"wp-block-heading\">Selector Linkage Problems<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Many transmission complaints actually originate outside the transmission.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Symptoms<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Difficulty selecting gears<\/li>\n\n\n\n<li>Incorrect gear engagement<\/li>\n\n\n\n<li>Excessive shifter movement<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Worn bushes<\/li>\n\n\n\n<li>Misadjusted linkage<\/li>\n\n\n\n<li>Damaged selector components<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Always inspect linkage before assuming internal transmission failure.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Common Maintenance Mistakes<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Ignoring Fluid Changes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Automatic transmissions depend heavily on clean fluid.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Overlooking Cooling Requirements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Heat destroys transmissions faster than almost any other factor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Misdiagnosing Engine Problems<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Engine performance issues are frequently blamed on the transmission.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rebuilding Without Replacing the Converter<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A contaminated converter can quickly damage a freshly rebuilt transmission.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Recommended Reliability Package<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">For both Powerglide and Trimatic transmissions, the best reliability upgrades include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fresh transmission fluid<\/li>\n\n\n\n<li>New filter and pan gasket<\/li>\n\n\n\n<li>Transmission cooler installation<\/li>\n\n\n\n<li>Seal replacement where necessary<\/li>\n\n\n\n<li>Linkage inspection and adjustment<\/li>\n\n\n\n<li>Torque converter inspection<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">These upgrades dramatically improve long-term reliability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Powerglide and Trimatic remain two of the most respected automatic transmissions ever fitted to Australian Holdens. While both are now well beyond their original design lifespan, they continue to provide reliable service when maintained correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Powerglide&#8217;s simplicity makes it almost legendary for durability, while the Trimatic offers a better driving experience thanks to its additional gear ratio. Both suffer from similar age-related issues including fluid leaks, seal deterioration, overheating and hydraulic wear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The key to avoiding expensive repairs is early diagnosis. Addressing small leaks, servicing fluid regularly and improving cooling capacity will prevent most major failures before they occur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For enthusiasts restoring or maintaining classic Holdens, a healthy Powerglide or Trimatic remains one of the most dependable and enjoyable transmissions ever produced.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>For Australian Holden enthusiasts, few automatic transmissions are as familiar as the Powerglide and Trimatic. These gearboxes powered everything from HK Monaros and Kingswoods through to Toranas, Commodores and countless street machines. Both earned reputations for durability, simplicity and ease of maintenance, but after decades of service, even the toughest transmission develops problems. Whether you&#8217;re [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":582,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-7309","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Powerglide &amp; Trimatic Issues Explained - Australian Holden<\/title>\n<meta name=\"description\" content=\"For Australian Holden enthusiasts, few automatic transmissions are as familiar as the Powerglide and Trimatic.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/australianholden.com\/index.php\/2026\/06\/20\/powerglide-trimatic-issues-explained\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Powerglide &amp; 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