- Code 628
- Excess cooler circuit oil loss
- Lube failures
- No lockup
- TCC cycling
- TCC surge
A worn bypass clutch control sleeve allows regulated converter charge and cooler circuit oil leakage.
These tightly toleranced, wear-resistant assemblies restore proper clearance to maintain hydraulic control.
Bypass Clutch Control Plunger Valve Kit
- Plunger Valve
.486" OE large spool diameter
Vehicles with an AX4N, 4F50N transmission frequently have excessive cooler circuit loss as well as torque converter clutch apply and release problems. These complaints can be caused by severe wear of the bypass clutch control sleeve, allowing regulated converter charge and cooler circuit oil leakage. This oil is fed to the lube circuits, cooler, TCC and into the sleeve to help maintain the TCC in the release position. If the sleeve is worn, oil will exhaust past the plunger valve to the sump, thus compromising the balance, but more importantly, leaking critical cooler oil. Sonnax has developed two tightly toleranced bypass clutch control sleeve and plunger valve kits, 96206-03K and 96206-13K, to eliminate these problems.
- Precision sleeves are manufactured from highly wear-resistant aluminum.
- The aluminum plunger valves are hard-coat anodized to prevent wear.
Original OE plunger valve must be measured. Match replacement to the OE size.
OE spools .486" and .415": Use 96206-03K.
OE spools .496" and .415": Use 96206-13K.
Mismatched replacement sleeve & plunger will cause TCC apply and other engagement issues