Citation II V6-173 2.8L VIN X 2-bbl (1985)
Clutch: All Technical Service Bulletins
A/T - Clutch Plate, Input Shaft, TCC Valve Revised
Number:
86-191
Section:
7A
Date:
NOV., 1986
Subject:
THM 440T4 TRANSMISSION PRODUCTION CHANGES
Model and Year:
1984-86 VEHICLES EQUIPPED WITH THM 440T4 TRANSMISSIONS
TO:
ALL CHEVROLET DEALERS
This bulletin provides three (3) changes incorporated in the 440T4 transmission.
3RD CLUTCH PLATE CHANGE
In 1985, 2.8L Chevrolet applications of the THM 440T4 changed to single-sided 3rd clutch plates. At the start of 1986 production, all THM 440T4
transaxles were built with single-sided clutch plates. When servicing 3rd clutch plates on any year/model 440T4, use the single-sided clutch plates. Refer
to Figure 1 for transaxle identification information.
Service Parts Information:
Service Package, 3rd Clutch Plate Kit: P/N 8646938
Service Manual Reference:
Refer to the applicable service manual, THM 440T4 Automatic Transaxle Unit Repair Table of Contents, for 3rd clutch service information.
-TRANSAXLE IDENTIFICATION INFORMATION
INPUT SHAFT SEAL ELIMINATION
All 1986 model THM 440T4 transaxles were built without an input shaft to 4th clutch shaft seal. When servicing a THM 440T4 built prior to 1986, it is
not necessary to replace the input shaft to 4th clutch shaft seal. Refer to Figure 1 for transaxle identification information.
