Front Suspension - Squeak Noise Diagnosis

NO.:
02-06-92

GROUP:
Suspension

DATE:
Nov. 2, 1992

SUBJECT:
Sway Bar Bushing Noise

MODELS:

1992-1993
(AA) Acclaim/Spirit/LeBaron Sedan
(AC) Dynasty/New Yorker Salon
(AG) Daytona
(AJ) LeBaron Coupe/LeBaron Convertible
(AP) Sundance/Shadow/Shadow Convertible
(AS) Caravan/Grand Caravan/Caravan C/V
Voyager/Grand Voyager/Town & Country
(AY) Imperial/New Yorker Fifth Avenue

SYMPTOM/CONDITION:

Some vehicles may experience a squeak noise during front suspension jounce and rebound travel. The noise may be coming from the sway bar bushings.

DISCUSSION:

The sway bar bushings are designed so the outer bushing (on the lower control arm) allows the sway bar to rotate and plunge within the bushing. The outer bushing inner diameter is teflon lined. The sway bar to crossmember bushing is designed to clamp the sway bar to prevent rotation of the sway bar relative to the bushing.

NOTE:
DO NOT LUBRICATE BUSHINGS TO ELIMINATE A SQUEAK. Oil based lubricants will deteriorate the rubber and provide only a temporary "fix". The noise will return in a short period of time after the lubricants are absorbed into the rubber. The lubricant allows the sway bar to rotate within the bushing and often makes the noise worse.

REPAIR PROCEDURE:

This bulletin involves the proper method of checking for worn bushings.

1. Support the vehicle by the front wheels as outlined in the appropriate service manual. Make sure that the suspension is not in a rebound position.

2. Check the sway bar bushing retainers for proper torque of 70 N-m (50 ft.lbs.). The sway bar should also be centered from side to side. The two inner sway bar to crossmember bushings should be oriented with the slit to the front of the vehicle.

3. If the bushings are twisted, loosen the sway bar retainers and reposition the bushings as outlined in the appropriate service manual (see illustration). If the noise persists, replace the bushings. Worn bushings can also cause noise and should be replaced.

POLICY:
Information Only