1953 - 1954 Corvette: Service News: Powerglide Clutch Interference
Subject: Powerglide Clutch
Model and Year: 1953 - 1954 Corvette
Source: Chevrolet Service News
Page Number: 3
Date: October, 1957 - Volume 29- Number 10
Due to limit stack conditions, a point of interference is possible when using a service replacement clutch drum or clutch assembly in 1953-54 Powerglide transmissions. The difficulty is caused by a ledge incorporated on the front face of a service replacement clutch drum, which can contact an embossed area on the valve body casting.
The interference can only be occasioned when using the following parts for replacement:
3740045 Clutch Drum Assembly
3742454 Clutch Assembly
3743840 Clutch Assembly
3748702 Clutch Assembly
Where clutch drum-valve body interference is noted when installing one of the above assemblies the valve body must be reworked to obtain drum operating clearance, as shown in Figure 2.