Rear Axle/Final Drive - Whining Noise

BULLETIN NUMBER:
4460001

DATE:
February 1, 2000

TITLE:
Rear axle/final drive, whining noise

MODELS:
All Wheel Drive (AWD) 1997-2000 850/S70/V70/V70 XC

SECTION
4

GROUP
46

NO.
0001

YEAR
00

MONTH
02

REFERENCE:

This Service Bulletin replaces the previous Service Bulletin 46-0001 from January 2000, which should be discarded.

BACKGROUND

A whining noise may be heard from the rear axle (final drive) between 80 and 95 km/h (50-60 mph) on some AWD and XC cars.

This Service Bulletin describes how to install a new type of counterweight on the viscous coupling housing mounting on the underbody.





VEHICLES INVOLVED





MATERIALS

TOOLS:
Drill

WHINING SOUND FROM REAR AXLE/FINAL DRIVE:

1





Preparations

Raise the car.

The vibration damper must be installed on the viscous coupling housing mounting on the underbody.

2





Removing the viscous coupling housing

Install a transmission jack as a support under the viscous coupling housing.

Remove the bolt for the viscous coupling housing mounting (see the illustration).

Lower the viscous coupling housing and propeller shaft. Clean any dirt and under-body sealant from the mounting.

Use Cleaner H, P/N 1161436-9.

3





Drilling holes

Drill a 4.5 mm (11/64") hole.

Note! Shorten the drill bit to approximately 12-15 mm (1/2") to obtain the correct angle for drilling.

Note! Refer to the illustration, and mark mount accordingly, to ensure correct center location for drilling.

Move the drill up.

Support the drill against the propeller shaft and the heat deflector plate.

Align the drill with the center of the mounting.

Drill.

4





Installing the counterweight

Remove the backing from the counterweight.

Press the counterweight into place on the mounting.

Install the screw.

Caution! Make sure the counterweight is positioned so it doesn't interfere with any other parts of the undercarriage.

5





Installing the viscous coupling housing

Lift up the viscous coupling housing using the jack.

Install a new bolt screw.

Tighten to 85 Nm (63 lb.ft).





WARRANTY STATEMENT: Claims may be submitted under the New Car Warranty when there is a documented customer complaint, using claim type 01.