Firebird V6-173 2.8L VIN L 2-bbl HP (1983)
Transmission Mount: Customer Interest
M/T - Reverse Clutch Chatter
Number 83-T-63
Section 7 Date 12/83
Subject:
REVERSE CLUTCH CHATTER WITH V-6 ENGINE AND MANUAL TRANSMISSION - 1983 FIREBIRD
Some 1983 Firebirds equipped with the 2.8L V-6 engine (LC1/LL1) and Borg-Warner five-speed manual transmission (MK5) may exhibit reverse gear
clutch chatter. This can be corrected on most vehicles by changing the clutch cordon shaft geometry and installing a different transmission rear mount. In
some instances, a new clutch assembly will also be required.
The following repair procedure is recommended:
1.
Cycle clutch several times to normalize the linkage; then perform the clutch pedal free travel adjustment as outlined in the service manual.
2.
Measure the horizontal distance between the clutch fork push rod's retainer clip hole and the nearest point on the engine's oil pan (see illustration).
3.
If measurement is 130 mm plus 5 mm minus 0 mm (5-1/8" plus 3/16" minus 0) proceed to Step 6.. If less than 130 mm, rework the clutch cordon
shaft lower lever to achieve that value as follows:
a.. Remove the cordon shaft and lever assembly (part number 14056673) from the vehicle.
b.
Carefully clamp the lower lever portion of the assembly in a vise such that the vise jaws are centrally located between the lever's weld joint on
one end, and its extruded (lower) hole on the other.
c.
Reduce the amount of existing bend in the lower lever by slowly tightening the vise. An entirely straightened lever represents a 9 mm (3/8")
correction.
d.
If lever required more than a 9mm (3/8") correction, it can be further reworked as follows:
1.
Reposition the lever in the vise to allow the jaws to clamp on the flat surface area adjacent to the weld joint.
2.
Clamp a locking plier adjacent to the extruded hole and continue to bend the lever in the direction required to achieve the necessary
deflection.
CAUTION.: Reshaping of lever must be accomplished without resulting in a broken weld joint.
e.
Install the reworked cordon shaft and lever assembly on the vehicle.
4.
Cycle clutch several times to normalize the linkage; then readjust the clutch pedal free travel as required.
5.
Remeasure the horizontal distance between the same two points as before. A measurement of 130 mm plus 5 mm minus 0 (5-1/8" plus 3/16" minus
0) indicates proper rework of the lower lever.
6.
Remove and replace the original production transmission rear mount with an after market mount similar to Republic Parts, Inc., part number
