Common complaints with AODE/4R70W/4R75W transmissions include delayed lockup, shudder, no lockup or converter codes. When too much oil is routed to this plunger valve, the bypass valve has slow reaction from MCC/TCC solenoid oil. If there is excessive wear at the plunger valve, regulated converter charge oil can leak to exhaust. Because this regulated converter charge oil is always present, either as release or apply pressure, severe leakage at the sleeve can result in TCC slip or no apply condition. Sonnax offers a replacement bypass clutch control sleeve and plunger valve with a restricted oil flow orifice, 76948-04K
BYPASS CLUTCH CONTROL SLEEVE & PLUNGER VALVE KIT
The single .030" orifice is much smaller than the OE size, allowing the bypass clutch control valve to properly stroke to the TCC apply position.
This eliminates the need to modify the plunger feed hole in the separator plate, which is a common industry adjustment.
