Canada - Drivetrain - Driveline Vibration Between 24-40 KM/H
Bulletin
TSB3018
Issue Date
August 15, 2008
Market
Canada
Title
Driveline Vibration between 24 - 40 km/h
Component
DRIVELINE
Models
'05-'08 Tacoma
INTRODUCTION:
Some customers may complain about a vibration felt in the seat, floorboard, and/or steering wheel between 24 - 40 km/h caused by a second order driveline vibration. Use the following repair procedure to address this concern.
APPLICABLE VEHICLES:
PRODUCTION CHANGE INFORMATION:
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
WARRANTY INFORMATION:
PARTS INFORMATION:
INSPECTION PROCEDURE:
Test drive the vehicle and confirm if a vibration is felt between 24-40 km/h while accelerating, decelerating (coasting), or while maintaining vehicle speed.
HINT
On 4WD trucks the following method can be used to confirm if this TSB applies to the vehicle:
- Shift into 4WD High.
- Lock the center differential.
- Remove the rear driveshaft and test drive the vehicle.
- The vibration will be completely eliminated if condition is a 2nd order driveshaft vibration.
NOTE
This TSB will NOT repair vibrations observed at speeds above or below the 24-40 km/h speed range.
Does vibration occur between 24-40 km/h?
If Yes - This TSB does apply. Go to the Repair Procedure to replace the rear engine insulator (2WD or 4WD applicable model).
If No - This TSB does NOT apply. Continue diagnosis and refer to the Repair Manual as necessary.
REPAIR PROCEDURE:
Replace Rear Engine Insulator (Rear Transmission Mount) - 2WD
1. Place the vehicle on a lift.
2. Support the automatic transmission assembly using a transmission jack assembly.
3. Loosen and remove the bolts retaining the rear engine insulator to the #3 frame crossmember, and the rear engine insulator to the transmission assembly.
4. Using the transmission jack, raise the transmission slightly so as to allow the removal of the original rear engine insulator (rear transmission mount).
5. Install the new rear engine insulator.
HINT
Refer to Figure to confirm the proper part identification by examining the label on the part, and for the proper positioning of the new engine mount in ATM equipped trucks.
6. Install the rear engine insulator onto the transmission with the 4 bolts.
Torque: 65 N-m (663 kgf-cm, 48 ft-lbf)
7. Install the 4 bolts retaining the rear engine insulator to the #3 frame crossmember.
Torque: 18.9 N-m (189 kgf-cm, 13.67 ft-lbf)
8. Test drive the vehicle and confirm the effectiveness of the repair.
Replace Rear Engine Insulator (Rear Transmission Mount) - 4WD
1. Place the vehicle on a lift.
2. Support the automatic transmission assembly using a transmission jack assembly.
3. Remove the propeller shaft heat shield that is attached to the #3 frame crossmember.
4. Loosen and remove the bolts retaining the rear engine insulator to the #3 frame crossmember, and the rear engine insulator to the transfer case assembly.
5. Using the transmission jack, raise the transmission/transfer case assembly slightly so as to allow the removal of the original rear engine insulator (rear transmission mount).
6. Install the new rear engine insulator.
HINT
Refer to Figure to confirm the proper part identification by examining the label on the part, and for the proper positioning of the new engine mount in ATM equipped trucks.
7. Install the rear engine insulator onto the transfer case with the 4 bolts.
Torque: 65 N-m (663 kgf-cm, 48 ft-lbf)
8. Install the 4 new 15 mm bolts P/N 91671-B0816, retaining the rear engine insulator to the #3 frame crossmember.
Torque: 18.9 N-m (189 kgf-cm, 13.67 ft-lbf)
9. Reinstall the propeller shaft assembly heat shield to the #3 frame crossmember using 2 new bolts 20 mm bolts (P/N 91671-80820) and a 6.5 mm spacer.
Torque: 15.7 N-m (160 kgf-cm, 11.6 ft-lbf).
Install the 6.5 mm spacer between the heat shield and mounting bracket locating the heat shield farther away from the transfer case and propeller shaft assembly.
10. Test drive the vehicle and confirm the effectiveness of the repair.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.