For 1990-2009 cars

# TRANSAXLE COOLER LINE LEAK (INSTALL SECOND CLAMP)

#### TRANSMISSION APPLICATIONS:

4T60, 4T60E

#### SUBJECT: -------- TRANSAXLE COOLER LINE FLUID LEAKS AT HOSE CLAMPS (INSTALL A SECOND CLAMP)

#### VEHICLE APPLICATIONS:

1991 "C AND H" MODELS

-----------------------------------------------------------------------------

Some owners of 1991 C and H models 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 Refer to Figure 3.

4. Slide the clamp over the stop bead and torque to 1.8 N.m +/- .4 N.m (16 in. lbs. +/- 3.5 in. lbs.).

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 (standard on Cadillac, part of option V92 (Trailer Towing) on Buick/Olds), 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, as shown in 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 in. lbs +/- 3.5 in. lbs)..

10. Reinstall right side headlamp module.

11. Check transaxle fluid level and add as needed.

#### VIN BREAKPOINT LIST

Park Avenue/Ninety-Eight/DeVille without V92

Orion Buick City Wentzville ----- ---------- ----------

(C Models) (H Models) (C Models) (H Models)

Cadillac Buick Buick Olds Start of Production Start of Production Start of Production M4272224 MH466688 M1657915 M1810032

Olds Olds Pontiac Start of Production Start of Production Start of Production M4313188 MH331022 M1227785

Park Avenue/Ninety-Eight/DeVille with V92 Orion Wentzville (C Models) (C Models) Start of Production Cadillac M1680661 Start of Production M4300822

Olds Start of Production M4313188

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.