S10/T10 P/U 2WD V6-262 4.3L (1988)
Shift Linkage: Technical Service Bulletins
Transfer Case - Hopout From 4-High to 2-High
Number:
89-202-7D
Section:
7D
Date:
July 1989
Subject:
TRANSFER CASE HOPOUT FROM 4-HIGH TO 2-HIGH
Model and Year:
1988-89 T TRUCKS WITH 231 TRANSFER CASE
TO:
ALL CHEVROLET DEALERS
Some 1988-89 T trucks may experience transfer case "hopout" from four-wheel drive high range to two-wheel drive mode. This condition is most
prevalent under extreme cold weather conditions (below 0 degrees F).
Some probable causes are listed below:
1.
Transfer case not fully engaged into 4-High position.
2.
Transfer case boot convolute trapped beneath the floor console.
3.
Transfer case shift linkage (detent bracket) improperly adjusted.
4.
Inadequate transfer case detent spring load.