G 2500 3/4 Ton Van V6-262 4.3L VIN Z (1992)
Fluid Pump: Technical Service Bulletins
A/T - New Pump Removal Tool
GMC NUMBER:
92-7A-55
GROUP:
7A Automatic Transmission
DATE:
February 1992
CORPORATE
NUMBER:
277107
SUBJECT:
INFORMATION ON NEW HYDRA-MATIC 4L60 PUMP REMOVAL TOOL
MODELS:
1991-92 S/T, M/L, C/K, R/V, AND G
In response to product changes made to the 1991 HYDRA-MATIC 4L60 stator shaft, a new essential tool has been released to remove the pump
assembly. The groove under the stator shaft splines has been removed, so the previous tool cannot fit onto the new shaft. The new tool is an adapter for
use with the current HYDRA-MATIC 4L80-E pump puller.
SERVICE INFORMATION:
Tools necessary to remove the HYDRA-MATIC 4L60 pump assembly include:
HYDRA-MATIC 4L80-E Pump Puller
HYDRA-MATIC 4L60 Adapter
HYDRA-MATIC 4L60 Forcing Screw
GMC Truck and Chevrolet dealers already have the HYDRA-MATIC 4L80-E pump puller as an essential tool. These dealers will receive only the
HYDRA-MATIC 4L60 adapter and forcing screw. All other dealers will receive the complete package.
The HYDRA-MATIC 4L60 forcing screw is longer than the screw on the HYDRA-MATIC 4L80-E pump puller to accommodate the shorter splines on
the stator shaft.
However, the previous pump puller is still needed for end play measurement and is used on several other transmissions for pump removal.
SERVICE TOOL INFORMATION:
Tools have been shipped to dealers.
Dealers currently servicing the HYDRA-MATIC 4L80-E will receive:
J39119
- Oil Pump Remover and Installer
Adapter (HYDRA-MATIC 4L60 Adapter)
J37789-4A
- HYDRA-MATIC 4L60 Forcing
Screw
Dealers NOT currently servicing the HDYRA-MATIC 4L80-E will receive:
J39119
- Oil Pump Remover and Installer
Adapter (HYDRA-MATIC 4L60 Adapter)
J37789-A
- HYDRA-MATIC 4L80-E Pump Puller
with HYDRA-MATIC 4L60 Forcing Screw
SERVICE PROCEDURE:
For dealers currently servicing the HYDRA-MATIC 4L80-E:
When the new pump puller tools arrive at your dealership, unscrew the forcing screw from your HYDRA-MATIC 4L80-E pump puller and install the
new forcing screw.
For dealers NOT currently servicing the HYDRA-MATIC 4L80-E:
