Phoenix L4-151 2.5L VIN 5 2-bbl (1982)
Torque Converter Clutch: Customer Interest
Torque Converter Clutch - Light Throttle Shudder
Number
83-T-31
Section 7 Date 05/83
Subject:
LIGHT THROTTLE TORQUE CONVERTER CLUTCH SHUDDER - ALL 1982 AND 1983 THM 125C MODELS
Since the start of production, 1982, the THM 125C transmission has had some changes in the auxiliary valve body cover. The changes were
implemented to eliminate a light throttle converter clutch shudder condition.
VIEW A - CAST SLOT
The 1982 auxiliary valve body cover originally had a cast slot in it (see illustration, View A) to exhaust oil from the converter clutch regulator valve
VIEW B - ORIFICED CUP PLUG
The auxiliary valve body cover was changed mid-model year to that of having an orificed cup plug (see illustration, View B) in place of the cast slot.
This orifice then regulated the exhaust from the converter clutch regulator valve.
VIEW C - SOLID CUP PLUG
Approximately May 1982, the auxiliary valve body cover was changed to omit the orifice in the cup plug (see illustration, View C).