Skylark L4-138 2.3L DOHC VIN D MFI (1988)
Accumulator: All Technical Service Bulletins
A/T - 1-2 Gear Shift Problem During Cold Weather
Bulletin:
88-7125-9
Date:
Sept. '88
Ref. No.:
88-202-7125
Corp. Ref. No.:
877134
SUBJECT:
1-2 SHIFT DURING COLD WEATHER - SERVICE AND PARTS INFORMATION ON NEW 1-2 ACCUMULATOR PISTON
MODELS AFFECTED: 1988 SKYHAWKS, SKYLARKS, AND CENTURYS EQUIPPED WITH A THM 125C (MD9) TRANSAXLE
FIGURE 2
BULLETIN COVERS
A new 1-2 Accumulator Piston (421) and Seal (420) for vehicles equipped with a THM 125C transaxle to increase shift consistency during vehicle
operation in cold weather conditions. The groove bottom on the 1-2 accumulator piston where the seal is located is flat and the new piston seal is now
made of a soft rubber instead of a hard P.T.F.E material (Refer to Figure 2).
Some vehicles equipped with a 1987 THM 125C built between the dates of April 13, 1987, through April 21, 1987 (Julian dates 103-112), may have a
rolled or misassembled 1-2 accumulator piston seal, resulting in a possible harsh 1-2 shift. This piston seal has a resemblance to the new (rubber) seal
(420). Refer to Bulletin 87-7125-5 for additional information. If replacement of this seal built between April 13, 1987, through April 21, 1987 (Julian
dates 103-112) is necessary, the new Accumulator Piston (421) and Seal (420) must be used.
