September 30, 2005
Vehicles with Aisin AW 450-43LE transmission may exhibit TCC apply and release problems, burnt converters and damage and loss of TCC friction lining. Wear is commonly found at different areas in the lockup control valve bore. Wear at the lockup control valve bore prevents the valve from stroking to the lockup position. Wear at the lockup plunger sleeve causes lower TCC apply and release pressures. Sonnax oversized lockup control valve and cutback valve kit 94987-05K restores hydraulic integrity to properly control the apply and release of the torque converter. The material for the valves has been upgraded from OE steel to hard-coat anodized aluminum. The precision sleeves are manufactured from highly wear resistant aluminum.
This kit can only be used with modulated TCC apply systems.
Sonnax 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.
A vacuum test at the port indicated fails to hold at least 16 in-Hg.