B3000 SE Regular Cab 4WD V6-3.0L OHV (1998)
Slip Yoke: All Technical Service Bulletins
Driveline - Thump/Clunk on Light Acceleration
Driveline/Axle
03-001/04
1998-2004 B-SERIES 4WD - THUMP / CLUNK
FROM DRIVELINE ON LIGHT ACCELERATION OR WHEN
STOPPING
Note:
This bulletin supersedes the following TSB(s): 03-003/03. Please update your records accordingly.
BULLETIN NOTE
This bulletin supersedes 03-003/03, issued 12/01/03. The APPLICABLE MODEL(S)/VINS, REPAIR PROCEDURE and PART(S)
INFORMATION have been revised.
APPLICABLE MODEL(S)/VINS
1998-2004 B-Series Cab Plus - 4WD Only
1998-2000 B-Series Standard Cab - 4WD Only
DESCRIPTION
Some customers may complain of a low frequency thump type noise/vibration on light acceleration from a stop, and/or when coming to a stop with light
to moderate braking. This condition may be caused by rear axle wind up, causing a stick/slip condition in the rear driveshaft slip yoke splines.
As a countermeasure, new grease is available for lubricating the rear driveshaft slip yoke splines. Customers having this concern should have their
vehicle repaired using the following repair procedure.
NOTE:
Other driveline noise conditions will not be corrected with this procedure. Refer to the appropriate Workshop manual for diagnosis and repair of
engagement clunk, tip-in/out clunk or clutch engagement clunk conditions.
REPAIR PROCEDURE
DRIVESHAFT REMOVAL
1.
Verify customer concern.
2.
Locate the yellow balance mark on the existing driveshaft.
^
If no marks are present on axle, use chalk/paint pen or equivalent and place an index mark on the axle in-line with the yellow mark on the drive
shaft. Mark the rear of the drive shaft at the pinion flange and front of the driveshaft at the transfer case flange.
^
If marks are present proceed to STEP 3.
3.
Remove bolts attaching driveshaft to pinion flange.
4.
Remove bolts attaching driveshaft to transfer case flange.
5.
Remove the driveshaft.