Celebrity V6-173 2.8L (1989)
Valve Body: All Technical Service Bulletins
A/T - 4T60 3-2 Tip-In Flare/Slip-Bump
Number: 91-202-7A
Section: 7A
Date: February 1991
Corporate Bulletin No.: 177102R
Subject:
3-2 TIP-IN FLARE/SLIP-BUMP AT 18-24 MPH
Model and Year:
1989 CELEBRITY WITH 4T60 AUTOMATIC
TRANSMISSION AND 2.8L ENGINE 1990 CELEBRITY AND LUMINA WITH 4T60 AUTOMATIC TRANSMISSION AND
3.1L ENGINE 1991 LUMINA WITH 4T60 AUTOMATIC TRANSMISSION AND 3.1L ENGINE
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 91-172-7A, DATED JANUARY 1991. A STATEMENT
HAS BEEN ADDED UNDER SERVICE PROCEDURES, CHART FORM INFORMATION UPDATED AND PLATE DESCRIPTION BELOW
PARTS NUMBERS UNDER "SERVICE PARTS INFORMATION" ADDED. ALL COPIES OF 91-172-7A SHOULD BE DISCARDED.
BULLETIN COVERS:
Some 1989 through 1991 A or W-cars equipped with a 2.8L (VIN W) or 3.1L (VIN T) engine and a HYDRA-MATIC 4T60 transaxle may exhibit a 3-2
light throttle tip-in flare/slip-bump condition at 18-24 MPH. A new 3-2 line control system and spacer plate are now available that will better control the
transaxle operation. These conditions can be corrected by replacing the components listed under "Service Procedure".
