GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1998
🢒
GMC P42 Commercial Chassis
🢒
Transmission/Transaxle
🢒
Automatic Transmission - 4L80-E
🢒 Transmission Fluid Pump Removal
Tools Required
•
J 23129
Universal Seal Remover
•
J 6125-1B
Slide Hammer
•
J 37789-A
Oil Pump Remover/Installer
Remove the turbine shaft oil seal ring (2).
Remove the torque converter oil seal assembly (201) using the
J 23129
and the
J 6125-1B
.
Remove the seven pump to case bolt and seal assemblies (3).
Attach the
J 37789-A
to the oil pump shaft. Tighten the thumb screw.
Turn the handle of the
J 37789-A
down onto the turbine shaft in order to raise the oil pump assembly (4) out of the case.
Remove the oil pump assembly (4).
Remove the
J 37789-A
.
Remove the transmission oil pump gasket (6).
Important:
The selective thrust washer (218) may be stuck to the pump cover.
Remove the selective thrust washer (218).