Driveline - Ping/Creak Noise
Bulletin No.: 001/97Issued: 04/08/97
Revised: 06/19/97
Category
J
Applicable Model/s
1991 - 94 Navajo
1994 - 96 B-Series
Subject:
"PING" OR "CREAK" NOISE FROM DRIVELINE - TRANSMISSION IS ENGAGED
NOTE:
The warranty information in this bulletin are revised. Replace the original bulletin with this revised copy.
APPLICABLE MODELS
1991 - 94 Navajo 4WD
1994 - 96 B-Series Cab Plus 2WD
1994 - 96 B-Series Regular Cab & Cab Plus 4WD
DESCRIPTION
A "ping" or "creak" (not a clunk) noise may be heard from the driveline when engine torque is initially applied (shifting gears or engaging clutch). The cause of the noise is driveshaft or transfer case yoke snapping across the spline clearance on the output shaft as torque is applied. Customers complaining of this noise should have the vehicle inspected and if necessary, repaired according to this bulletin.
REPAIR PROCEDURE - 2WD Cab Plus and 4WD Cab Plus Only.
CAUTION:
Original parts orientation is extremely important. MARK mating components prior to disassembly. Improper component assembly may result in driveline vibration.
1. Verify concern.
2. Mark the yoke and coupling output shaft.
3. Separate coupling shaft and rear drive shaft
4. Remove center bearing yoke retaining nut and center bearing yoke. Fig. 1
5. Clean all oil from splines (male and female) with a suitable solvent.
6. Apply Loctite Quick Metal Retaining Compound to the splines on the center bearing yoke.
CAUTION:
Do not apply compound to the coupling output shaft splines.
7. Install yoke and nut making sure that the excess compound is squeezed away from the center bearing.
8. Tighten center bearing yoke nut using special tool (SST 49-5120-710 or equivalent) to hold center bearing yoke in place.
Tightening Torque: 135 - 162 Nm (100 - 120 ft-lbs)
9. Assemble coupling shaft and rear driveshaft.
NOTE:
Align shafts with original alignment marks.
10. Tighten four (4) universal joint retaining bolts.
Tightening Torque: 18 - 25 Nm (13 - 18 ft-lbs)
11. Write "Loctite", the date and this bulletin number on the center yoke with a paint pen.
NOTE:
This information will inform future technicians that a 3-jaw puller is required to remove this yoke if future repair is necessary.
12. Verify repair on 2WD vehicles, 4WD Cab Plus vehicles proceed to transfer case repairs.
REPAIR PROCEDURE - All 4WD
1. Verify concern.
2. Mark and remove the complete rear driveshaft assembly to gain access to the rear yoke nut on the transfer case. Refer to the workshop manual for removal instructions.
3. Remove transfer case yoke retaining nut and transfer case yoke. Fig. 2
4. Clean all oil from splines (male and female) with a suitable solvent
5. Apply Loctite Quick Metal Retaining Compound to the splines on the transfer case rear yoke.
CAUTION:
Do not apply compound to the transfer case output shaft splines.
6. Install yoke making sure that the excess compound is squeezed away from the transfer case.
7. Tighten transfer case yoke nut using special tool (SST 49-5120710 or equivalent) to hold the yoke in place.
Tightening Torque: 339-380 Nm (250 -280 ft-lbs)
8. Install rear driveshaft assembly.
NOTE:
Align shafts with original alignment marks.
9. Tighten eight (8) rear driveshaft retaining bolts. Refer to the workshop manual.
Tightening Torque: 88 - 119 Nm (65 - 87 ft-lbs)
10. Write "Loctite", the date and this bulletin number on the transfer case yoke with a paint pen.
NOTE:
This information will inform future technicians that a 3-jaw puller is required to remove this yoke if future repair is necessary.
11. Verify repair.
PARTS INFORMATION - Obtain locally
Mazda dealers in the U.S. - Call 1-800-338-9000, 8am to 5pm (EST) or fax 1-800-548-7369
Mazda dealers in Canada - Call 1-905-890-6511, or fax 1-905-890-6522
Ask for Loctite Quick Metal Retaining Compound Program PN 66010
WARRANTY INFORMATION
(Applies To Verified Customer Complaints On Vehicles Covered Under Normal Warranty. Refer To The SRT Microfiche For Warranty Term Information.)
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