TRANSAXLE COOLER LINE LEAK (INSTALL SECOND CLAMP)

SUBJECT TRANSAXLE COOLER LINE FLUID LEAKS AT HOSE CLAMPS - INSTALL A SECOND CLAMP

MODELS/YEARS 1991 EIGHTY EIGHT AND NINETY EIGHT ----------------------------------------------------------------------------- Some 1991 Eighty Eight (start of production [SOP] through MH331022 Flint, SOP through M1810032 Wentzville) and Ninety Eight (SOP through M4313188 Orion) models may exhibit a transaxle fluid leak at any of the cooler hose to pipe connections (see Figures 1 and 2). This leak which may be caused by a lack of interference fit between the hose and pipe. To correct this condition, it will be necessary to install a second clamp at the connections shown in Figure 1 and, if equipped with auxiliary oil cooler, (part of option V92 Trailer Towing) replace the hoses shown in Figure 2.

SERVICE PROCEDURE:

1. Raise vehicle to access hose to pipe worm gear clamps at positions shown in Figure 1.

2. Loosen both clamps.

3. Push hoses over stop (2nd) beads approximately 5mm (see Figure 3).

4. Slide the clamp over the stop bead and torque to 2.0 N. m (16 lbs. in.).

5. Install a second worm gear clamp (Part Number 22527587 or equivalent) over the initial (1st) bead and torque as in step 4.

6. If equipped with auxiliary oil cooler (part of Trailer Towing option V92) proceed with Step 7. If not equipped with auxiliary oil cooler, lower vehicle. Check fluid level and add as needed.

7. Remove right side headlamp module.

8. Loosen four (4) clamps (see Figure 2) and remove and discard cooler pipe to auxiliary cooler hoses.

9. Install new hoses, part number (upper) 25608924, (lower) 25608925 and torque clamps to 2.0 N.m (16 lbs. in.).

10. Reinstall right side headlamp module.

11. Check transaxle fluid level and add as needed.

Parts are currently available from GMSPO.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.