Rear Brakes - Cyclic Chirping Noise

NO: 05-05-96

GROUP: Brakes

DATE: May 5, 1996

SUBJECT:
Rear Brake Cyclic Chirp

NOTE:
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 05-04-96 DATED MARCH 8, 1996 AND TECHNICAL SERVICE BULLETIN 05-06-95 DATED MAY 19, 1995 WHICH SHOULD BE REMOVED FROM YOUR FILES. THE 1996 SEBRING CONVERTIBLE HAS BEEN ADDED AND THE "PROTECT -A- CUP", LUBE IS NOW AVAILABLE THRU MOPAR PARTS. ALL CHANGES ARE MARKED WITH **ASTERISKS**

MODELS:

1995 - 1996 (PL) Neon
1996 (JX) Sebring Convertible**

SYMPTOM/CONDITION:

A cyclic chirp noise from the rear of the vehicle during medium to light brake application, at low speeds (20 mph or less) on vehicles equipped with rear drum brakes. The noise can be related to the speed at which the tire turns (one squeak/squawk per revolution of the tire). As the vehicle slows, during the brake application, the noise will occur at a slower rate.

**NOTE:
THIS REPAIR HAS NO EFFECT ON THE REAR BRAKE HOWL NOISE THAT MAY OCCUR ON NEONS, AT THE END OF THE STOP. THE REAR BRAKE HOWL NOISE IS COVERED IN A SEPARATE TECHNICAL SERVICE BULLETIN.**

PARTS REQUIRED:

1 4883068 "Protect -A- Cup" (Lube Cap)

REPAIR PROCEDURE:

This bulletin involves the installation of 4 drops of the "Protect -A- Cup" lubricant into each rear wheel cylinder.

1. Raise car on suitable hoist and remove rear wheels.

2. Remove rear brake drum retaining clips (1 per side) and remove rear brake drums.





3. Peel back the top edge of the wheel cylinder boot and put four drops of the "Protect - A - Cup" fluid into the wheel cylinder. This fluid acts as a lubricant between the wheel cylinder the piston and the wheel cylinder boot (Figure 1).

4. Install the wheel cylinder boot onto the wheel cylinder casting. Make sure that the boot seats properly on the casting lip all the way around the wheel cylinder.

5. Repeat the process for the other three boots (two per brake).

CAUTION:
THE "PROTECT -A- CUP" ASSEMBLY FLUID USED TO ADDRESS THE CYCLIC CHIRP NOISE SHOULD NOT BE USED FOR ANY PURPOSE IN THE VEHICLE1S BRAKE SYSTEM OTHER THAN AS DESCRIBED IN THIS TSB.

6. Wipe any spilled fluid from the outside of the wheel cylinder as well as any other brake parts including the linings.

7. Install the brake drums, retaining clips and rear wheels.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 05-90-50-93 0.5 Hrs.

FAILURE CODE: XX - Service Adjustment