Tool Required VB-FIX Required
- Delayed engagement
- Gear ratio codes
- High line pressure in Reverse
- Low pressure
- Repeated case breakage
- TCC codes
Wear at the pressure regulator bore, especially at the balance end, results inthe PR valve not being able to stroke to the lower line pressure position. This results in high line pressure. Leakage of line to exhaust reduces line rise. Slow line rise in response to engine load eventually burns a clutch or reduces TCC apply pressure.
Refurbish worn bores using the specially designed F series tool kit and the Sonnax VB- FIX and install the Sonnax oversized Pressure Regulator valve and boost valve assembly
Oversized Pressure Regulator & Boost Valve Kit
- Pressure Regulator Valve
- Boost Valve
- Boost Sleeve
1994 & later
- Hard-coat anodized aluminum valve.
- New boost valve is calibrated to work with OS pressure regulator valve.
Reamer kit F-72754-TL3 is no longer in production but may be available from distributor inventory.