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Vehicles equipped with ZF6HP19/21/32 (Gen. 1) transmissions often develop erratic or high line pressure due to excessive wear in the OE pressure regulator bore and...Read More
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The OE sun gear shaft bushings located at front and rear of the sun gear shaft in ZF6HP26 and ZF6HP28 units have a tendency to wear out prematurely due to sub-opti...Read More
Tool Kit for 95740-69K
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface a...Read More
Sonnax high-performance pump slide spring 104534-HD for GM 6L80 and 6L90 transmissions helps maintain consistent pump volume during line rise and at high-RPM opera...Read More
October 14, 2020
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GM 6L80 and 6L90 1-2-3-4 pistons commonly crack due to cantilevered stress on the cast material. The OE part has been through several revisions in an attempt to c...Read More
GM 6L80 extension housing bushings are prone to wear prematurely due to sub-optimal material composition. Restore normal operation and provide greater wear resista...Read More
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Not enough clutches and insufficient clutch piston-...Read More
Sonnax piston plate GM-DA-17P, when used with solid, flat head rivets GM-RV-13, replaces failed plates in GM 6L80, 6L90 (300mm) converters. Steel-forged for ...Read More
The long planetary pinion pins in GM 6L80 transmissions are notorious for allowing the smaller gear to burn and seize due to lack of adequate lube. This often dest...Read More
The GM Corvettes that use the GM 6L80, 6L90 (300mm) torque converter often have engine modifications for increased output, which can quickly push the stock, single...Read More
Sonnax high capacity 3-5-R apply ring 104548-01 for GM 6L80 units is shorter than the OE apply ring. When the Sonnax apply ring is installed and the OE waved plate...Read More
The output planetary assembly in GM 6L80 transmissions has a lube dam, or cover, that directs lube oil flow to the planetary lube feed passages. Over time, the lub...Read More
The output planetary assembly in GM 6L80 and 6L90 transmissions has a lube dam, or cover, that directs lube oil flow to the planetary lube feed passages. Over time...Read More
In GM 6L80 transmissions, the low/reverse sprag elements, end caps and retainer plates are prone to wear, while the race is often unaffected. This results in a bin...Read More
July 29, 2015
