A/T - No Reverse/Neutral to Reverse Delayed Engagement
Model Year 1983Bulletin No. 83-186
File in Group 70
Number 33
Date Oct. '83
SUBJECT: NO REVERSE OR NEUTRAL TO REVERSE DELAYED ENGAGEMENT
MODELS AFFECTED: 1980 THRU 1983 SKYLARKS, SKYHAWKS AND CENTURYS EQUIPPED WITH THM 125 or THM 125C TRANSMISSIONS
FIGURE 1 - LOW AND REVERSE PISTON ASSEMBLY:
FIGURE 2 - (1) OIL DISPLACEMENT INSERT:
FIGURE 5 - THIRD DESIGN:
To correct subject conditions on some subject cars, two changes in the low and reverse clutch assembly (Fig. 5) have been introduced. The low and reverse piston assembly is produced with a third design lip seal retainer (Fig. 1). An oil displacement insert (Fig. 2) has been added to the low and reverse clutch assembly. This insert displaces oil and quickens the apply of the low and reverse clutch.
When servicing any 1980 thru 1983 THM 125/125C transaxle for a no reverse or a neutral to reverse delayed engagement, refer to the following chart.
FIGURE 3 - FIRST DESIGN:
Type of Low and
Condition Reverse Clutch Asm. Correction
No reverse (Lip Seal First Design Replace the low and reverse
Retainer has separated (Figure 3) clutch assembly with Service
from the low and reverse Package #8653915. Also add
piston assembly) or the oil displacement insert
delayed neutral to reverse (part number 8643490).
engagement.
FIGURE 4 - SECOND DESIGN:
No reverse (Lip Seal Second Design Replace the second design
Retainer has separated (Figure 4) low and reverse piston with
from low and reverse a third design low and reverse
piston assembly) piston (part #8653916)
Neutral to Reverse Second Design Add the oil displacement
Delayed Engagement (Figure 4) insert (part #8643490) to the
low and reverse clutch assembly