A/T - Clunking Noise on 3-2 Downshift

BULLETIN NUMBER
SB93-05-014

ISSUE DATE
July 1993

GROUP
TRANSMISSION

4L30-E A/T DOWNSHIFT CLUNK WHEN BRAKING

AFFECTED VEHICLES

1990-91 Trooper II (KT), 1992-93 Trooper (UX) and 1991-93 Rodeo (UC) models equipped with 4L30-E automatic transmission with A/T assembly serial number before 4006228.

NOTE
A/T serial number is stamped on the identification plate located on the left side of the transmission case, above the mode switch.

SERVICE INFORMATION

Affected vehicles may experience a clunking noise during the 3rd to 2nd gear downshift when braking. The noise is caused by poor band apply solenoid operation. Installing a new, improved band apply solenoid (see "Parts Information" section of this Service Bulletin) will eliminate this condition.

FLAT RATE MANUAL UPDATE INFORMATION





Use the existing labor operation. See illustration.

SERVICE PROCEDURE

If a clunking noise is heard during the 3rd to 2nd gear downshift when braking, replace the band apply solenoid (using parts listed in the "Parts Information" section of this Service Bulletin), following the procedures in the appropriate Workshop Manual.





PARTS INFORMATION