September 30, 2005
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits
Gregg Nader
Symptoms:
- Loss of cooler flow
- Overheating
- Shuttle or loss of lockup
- Premature lockup
- TCC apply & release concerns
- Engine stall on engagement
Cause:
Wear at the control valve casting bore and in the plunger sleeve allows valuable TCC control fluid loss, resulting in multiple converter malfunctions and driveability complaints.Correction:
Restore correct hydraulic control by refurbishing the bore utilizing an application specific reamer and replacing worn parts with Sonnax oversized TCC control valve kit.09A,JF506E
Oversized TCC Control Valve Kit
Part No.122892-16K
-
Tooling:
- F-122892-TL16
- VB-FIX
You need this if... View Instructions Find a Distributor
Vehicles with Jatco/Nissan JF506E and VW/Audi 09A transmissions may exhibit a host of TCC apply/release problems and reduced cooler/lube flow. These complaints can often be traced to significant wear of the TCC control valve train. The symptoms vary in action and severity depending on the extent and location of the wear. Wear allows hydraulic fluid under pressure to escape either to the sump or adjacent circuits. The missing, reduced or increased fluid flow and pressure negatively effects the timing and quality of the lockup clutch apply and release action.
Sonnax oversized TCC control valve kit 122892-16K restores hydraulic integrity resulting in a properly positioned control valve permitting appropriate shift timing and quality.
- Oversized valve train assembly restores proper hydraulic clearances
- Oversized valve paired with custom spring matches OE pressure curves
- Added annular grooves for better centering in bore and to prevent future wear
- TCC Control Valve
- Spring
- Plunger Valve
- Plunger Sleeve
