1ST - Reverse Brake Assembly

Inspect
- 1st-reverse brake piston for:
- Porosity or damage.
- Ring groove damage.

INSTALL OR CONNECT

^ Tools Required:
- J 23327 Clutch Spring Compressor
- J 36850 Transjel Transmission Assembly Lubricant

1. Inner and outer piston seals onto the piston. Lubricate inner and outer piston seals with J 36850.





2. Piston into transaxle case.
3. Return spring assembly onto the piston with the spring side of assembly facing toward piston.
4. A J 23327 over the spring assembly.
5. Compress the spring assembly past the ring groove in the case hub. DO NOT compress the return spring assembly more than what is necessary to fit the return spring snap ring.





6. Return spring assembly snap ring into the case hub ring groove.

NOTICE: When installing new clutch discs in the 1st-reverse brake, forward clutch or direct clutch assemblies, the new clutch discs MUST be soaked in Dexron(R)-III automatic transmission fluid GM P/N 12341643, or equivalent, two hours prior to installation. This causes the clutch material on the discs to permeate with fluid which will aid in ease of assembly and prevent clutch overheating on first time engagement.





7. 1st-reverse brake damper plate into case. Place the convex side of damper plate facing upward or away from return spring assembly. 1st-reverse brake discs and plates alternately in the following order:
A. Plate
B. Disc
C. Plate
D. Disc
E. Plate
F. Disc
G. Plate
H. Disc





9. 1st-reverse brake flange. Place the flat side of flange facing downward Of against the last clutch disc.
10. No. 2 inner one-way clutch race snap ring.





Measure
- 1st-reverse brake clearance between the no. 2 inner one-way clutch race snap ring and the 1st-reverse brake flange using a feeler gage. If clearance is greater than 0.58 to 1.92 mm (0.023 to 0.075 inch), replace the 1st-reverse discs and plates.





Inspect
- 1st-reverse brake piston for operation by slowly applying low pressure compressed air into the fluid passage. When the air pressure Is released, the return spring assembly should force the piston back into its original position