Bonneville V6-231 3.8L VIN 3 SFI (1988)
side) of the outside race to the wide flat edge of the dam as shown in Figure 3.
NOTICE:
Measure the press in depth for the dam as shown in Figure 3. Measuring from the top of the 3rd roller clutch race to the dam will be
inaccurate because all the machining of the 3rd roller clutch race is based on the opposite side (side that mates to the input sprag). If
the dam is pressed in too far or not far enough, it could rub on the 3rd roller clutch cage or the snap ring that retains the 3rd clutch
return spring and create excess heat to distress the cage of the 3rd roller clutch.
12.
Line Pressures: Lubrication fluid is proportional with line pressures. If the line pressure is below specification, the lubrication fluid flow would be
inadequate. Check the line pressure as outlined in the service manual and reference Pontiac Service Bulletin 90-7-36 issued 6/90 for further details
about vacuum modulator diagnosis.
13.
Check converter clutch regulator valve for proper operation, binding, sediment or damage, etc. This valve controls the flow of lubrication - when
the torque/viscous converter clutch (TCC/VCC) is applied, mainline lubrication fluid from the pump pressure regulator is routed past the torque
converter directly to the cooler; when TCC/VCC is not applied, the fluid is routed through the converter, then to the cooler. If the valve is
damaged, a new valve is included in service package 8646934 - use only the convertor clutch regulator valve from this package.
SERVICE PARTS
INFORMATION:
Part
Number
Description
Usage
8646934
Package, V.B. Spacer Plate Conv.
All 1984-1991 4T60
C1. Regulator Valve and Spring
Models
IMPORTANT:
USE ONLY THE CONV. CL. REGULATOR VALVE FROM THE PACKAGE.
Parts are currently available from GMSPO.
