Cutlass V8-307 5.0L VIN 9 4-bbl HP (1984)
Forward clutch assembly, minus check ball in housing (619) Forward clutch piston assembly (623) Additional waved plate (627) Front internal gear
(636)
Service Action:
1984-87 models built before August 4, 1986 (Julian Date 216):
If a vehicle equipped with a THM 200C transmission listed in service parts information has a harsh park/neutral to drive engagement, install the neutral
drive shift package.
1987 models built on or after August 4, 1986 (Julian Date 216):
Models built after implementation of the feed/bleed system can be serviced with individual parts.
IMPORTANT:
When servicing the forward clutch, select the correct backing plate (629). Backing plate selection affects piston travel, shift feel and
clutch durability.
FIGURE 3
Backing Plate Selection (Clutch Fully Assemblied):
Apply an evenly distributed load in the direction indicated in Figure 3 to remove slack from the clutch assembly. Use 9 kg (20 lbs.) of pressure against
the backing plate--excessive pressure will cause an inaccurate measurement. With the clutch assembly compressed, use a feeler gauge to measure the
distance between the backing plate and snap ring. Correct backing plate travel is 0.7 mm - 1.5 mm (0.028" - 0.059").
Service Parts Information:
1984-87 models (excluding 1984-85 CZ, JY which are not used by Oldsmobile) built before August 4, 1986 (Julian Date 216):
Part Number
Description
8638957
Neutral drive shift package (contains forward clutch assembly
complete, front internal gear and thrust washer)
1987 models built on or after August 4, 1986 (Julian Date 216):
8648720
Forward clutch assembly, complete
8638956
Forward clutch housing package
8648721
Forward clutch piston