Celebrity L4-151 2.5L (1982)
Fluid Pump: Technical Service Bulletins
A/T Oil Pump/Rotor and Slide - Revised Part Numbers
Number:
86-151
Section:
7A
Date:
Sept. 1986
Subject:
1980-86 THM 125/125C UPDATED SERVICE PART NUMBERS FOR OIL PUMP ROTOR AND SLIDE
MODEL AND YEAR:
1980-1986 MODELS WITH 125/125C TRANSMISSION
TO:
ALL CHEVROLET DEALERS
This bulletin supercedes Chevrolet Dealer Information Bulletin 83-I-90 (dated July, 1983) Section VII C, which should be destroyed.
When servicing the oil pump rotor and slide on a THM 125/125C transaxle, refer to the appropriate Service Manual, which describes the following
procedure:
FIGURE 1 - MICROMETER MEASUREMENT OF SLIDE OR ROTOR THICKNESS
Use a micrometer to measure the original pump rotor and/or slide thickness. Refer to Figure 1. Take measurement on a flat, undamaged surface.
Use the original part measurement to select the proper service package from the following charts:
1980-1981 THM 125
(Order rotor and slide separately)
Rotor (mm)
Part Number
Slide (mm)
Part Number
17.943-17.955
8653961
17.955-17.967
8631800
17.956-17.968
8653962
17.968-17.980
8631801
17.969-17.981
8653963
17.981-17.993
8631802
17.982-17.994
8653964
17.994-18.006
8631803
17.995-18.008
8653965
18.007-18.020
8631804
1982-1986 THM 125C (Order rotor and slide as complete package)
Rotor (mm)
Service Package Number
17.943-17.956
8652903
17.956-17.969
8652904
17.969-17.982
8652905
17.917-17.930
8652906
17.930-17.943
8652907