September 30, 2005
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits
Gregg Nader
In Aisin AW TF-80SC and TF-81SC transmissions, the boost sleeve wears from repeated oscillation of the boost valve, allowing Reverse pressure to exhaust. This can result in delayed Reverse, low line pressure in Reverse and/or burnt C3 and B2 brake clutches. Sonnax boost valve kit 39741-44K eliminates these concerns and restores proper hydraulic control. The drop-in Zip Valve™ parts install quickly and easily.
Learn More About Zip Valve™ Drop-In RepairsSonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
September 30, 2005
Gregg Nader
A vacuum test at the port indicated fails to hold at least 18 in-Hg.