NHTSA ID Number: 10201286
Manufacturer Communication Number: PIP5810
TSB/Document Date: 2021-09-13
Summary
This Preliminary information communicates that the tool for the HD transfer cases to install the input seal during a repair is incorrect and a new tool is in development.?
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TSB/Document ID: PIP5810
Replacement Service Bulletin Number:
MFR Communication Date: 2021-06-16
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN:MANUAL TRANSMISSION:SEALS/GASKETS
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Bulletin No.: PIP5810
Published date: 06/16/2021
Preliminary Information
PIP5810 Transfer Case Input Seal Installation
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Silverado 2500 HD/3500 HD
2020 - 2021
All
All
All
MGM, MGU
Sierra 2500 HD/3500 HD
2020 - 2021
All
All
All
MGM, MGU
Involved Region or
Country
North America
Additional Options
(RPO)
NGF, NQH
Condition
Transfer case input seal installation tool will not install seal to
correct depth.
Cause
New tool being developed.
Condition/Concern
Seal installation depth is critical when replacing the transfer case input seal. There is a gap
around the outer portion of the seal that needs to be centered over a weep hole in the case.
Weep hole is drilled in the center of a grove machined into the case. Tool # DT-50648-A Seal
Installer will not work for these applications.
There are 2 design transfer case front case halves and the seals install at different depths
between design 1 and 2. To identify design level look for a machined groove where the seal
is installed (Red circles below). If there is a defined machined groove in the case then it is a
first design case. If there is not a defined groove machined into the case then it is second
design.
First Design
Second Design
While GM works through the servicing tool strategies, J-45228 (4) can be used to drive the
seal in HOWEVER there is no stop at the correct depth. The seal will have to be driven in
slowly and seal installed depth checked. Be careful not to drive in to deep or you will need to
replace the seal again.
One tip for installation is to determine case design level, and put a mark on the outside of J-45228 at 17 mm for
rst design and 19.5 for second design (3) as a visual aid to stop when the mark is even with the case.
To verify correct installed depth using a vernier caliper check the distance between the case
and the outer part of the seal.
First design dimension 1 is 10 mm.
Second design dimension 2 is 13 mm.
Warranty Information
No associated or special labor operation, please use the labor op for the repair being performed, this document
was created to ensure correct depth in case of a seal replacement.
Version History
Version
Modi ed
1
06/16/2021 - Created on
© 2021 General Motors
. All Rights Reserved.
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