Safari Van M V6-262 4.3L VIN Z TBI (1990)
Wheel Speed Sensor: Customer Interest
ABS - Noise From Rear Wheels During Turns
GMC NUMBER:
90-5E-61
GROUP:
5E Anti-Lock Brakes
DATE:
May, 1990
CORPORATE
NUMBER:
065003
SUBJECT:
REAR WHEEL(S) SQUEAKY, SQUEAL/SCRAPE NOISE;
MODELS:
1990 M/L VANS
Some customers may comment of squealing or scraping sounds generated near the rear wheel(s) which may be exhibited only on turns. This condition
can be caused by one or both of the rear wheel sensor reluctors contacting the tone wheel(s). The rear wheel sensors are not adjustable, however a
technician might achieve sufficient clearance between the sensor and the tone wheel to eliminate this condition by loosening the wheel sensor mounting
bolts, lightly prying the sensor away from the tone wheel with a small screwdriver to remove any slack, and then re-tightening the bolts to 35 N-m (26
ft.lbs).
If this is not effective the sensor must be replaced.
Important
Light contact of the sensor reluctor to the tone wheel should not affect the durability of the tone wheel, and the tone wheel should not require
replacement.
Figure 1 Rear Wheel Sensor
Service Procedure (Refer to fig 1.):
1.
Remove rear wheel and tire assembly.
2.
Remove brake drum.
3.
Remove primary brake shoe. Refer to Hydraulic Foundation Brakes (SEC. 5A2 of service manual X-9030).
4.
Loosen sensor mounfing bolts (2).
*
With a SMALL screwdriver very lightly pry the sensor outward, away from the tone wheel, to remove any slack.
*
Tighten the mounting bolts to 35 N-m (26 ft.lbs).
