TRANSAXLE COOLER LINE LEAK (INSTALL SECOND CLAMP)

SUBJECT: TRANSAXLE OIL COOLER PIPE FLUID LEAK AT HOSE CLAMPS

MODELS AFFECTED: 1991 LESABRE AND PARK AVENUE

Some owners of 1991 LeSabres and Park Avenues may comment of a transaxle fluid leak at any of the cooler hose to pipe connections (see Figures 1 and 2) 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 1.8 N.m +/- .4 N.m (16 lbs.in. +/- 3.5 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 option V92 Trailer Towing), 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 1.8 N.m +/- .4 N.m (16 lbs.in. +/- 3.5 lbs.in.). 10. Reinstall right side headlamp module. 11. Check transaxle fluid level and add as needed.

PARTS STATEMENT

Parts are expected to be available on November 4, 1991. In case of limited inventory, parts will be placed on 400 control to waive VIP surcharges. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. However, the part will be shipped premium transportation at dealer's expense and all other order types will be placed on backorder until the 400 control is removed.

VIN BREAKPOINT LIST

LeSabre Start of production through MH466688

Park Avenue/Ultra without Option V92 Start of production through M1657915

Park Avenue/Ultra with Option V92 Start of production through M1680661

WARRANTY INFORMATION:

OPERATION DESCRIPTION TIME --------- -------------------------- ------- T5223 Transaxle oil cooler leak - .3 Repair

Add .5 to replace hose if equipped with auxiliary oil cooler (part of Option V92 Trailer Towing).

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.