A/T - Second Gear Start Out
85-1227A
SEPT., 1985
Subject: SECOND GEAR START OUT ON THM 440-T4 TRANSMISSION (MODELS CP & CW)
Model and Year: 1985 CELEBRITY
TO: ALL CHEVROLET DEALERS
FIGURE 1 TRANSAXLE IDENTIFICATION NAMEPLATE:
Some 1985 THM 440-T4 model CP or CW transaxles (refer to Figure 1) may exhibit a condition of second gear start out with the selector in "DRIVE" after coastdown from second, third or fourth gear operation. The condition may occur several times (especially when the transaxle is cold) and may be caused by the 1-2 shift valve remaining in the upshifted position due to residual pressure in the governor circuit.
The following chart lists, by model, the Julian date a new governor assembly went into production and the service replacement part number.
Model Julian Date Service Part Number
CP 100 8644961
CW 81 8644963
To repair the second gear start out on any 1985 THM 440-T4 model CP or CW transaxle built before the listed Julian date, install the appropriate new design governor assembly. Refer to the Service Information Manual for proper service procedures.