For 1990-2009 cars

# NEUTRAL GEAR RATTLE 5-SPEED SERVICE PROCEDURE

1984-85 FIREBIRD

Some 1984-85 Firebirds with 2.5L engines and 5-speed manual tranmissions may exhibit one of two different gear rattle noise conditions which can be described as follows:

CONDITION #1 (1984 OR 1985 MODELS):

Neutral Gear Rattle - transmission gear rattle noise experienced with the shift lever in the neutral position and the clutch engaged.

CONDITION #2 (1984 MODEL ONLY):

Overrun Gear Rattle - transmission gear rattle noise experienced during deceleration (overrun) in either 2nd, 3rd, or 4th gears with the clutch engaged.

Condition #1 can be corrected as follows:

1. Set idle speed to specification.

2. Replace the following parts:

Clutch Pressure Plate Assembly P/N 14091979

Clutch Driven Disc P/N 14091980

#### NOTICE: Due to changes in the 1985 clutch assembly, 1985 vehicles will only require changing the clutch driven disc (P/N 14091980) to correct the condition.

Condition #2 can be corrected by replacing the following parts:

Shift Lever P/N 10042197 Clutch Driven Disc P/N 14091980

Use applicable labor time and operation number.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.