I have a 63 (CF 12 2 63) differential that I want to use a 78 differential cover on. I know the spring width/pad, mounting bolts and spring retainer plate are different. Are there any other differences that would prevent me from making this swap. The 63 differential cover has 2 of the mounting threaded bosses broken.
C2/C3 differential differences
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Re: C2/C3 differential differences
I have a 63 (CF 12 2 63) differential that I want to use a 78 differential cover on. I know the spring width/pad, mounting bolts and spring retainer plate are different. Are there any other differences that would prevent me from making this swap. The 63 differential cover has 2 of the mounting threaded bosses broken.
Geary------
The 1978 cover, GM #464909 (cast 464910) will SERVICE the 1963 application IF the 7/16" spring retainer bolts, GM #457977 retainer plate AND 2 GM #459032 spacers are also used. All are discontinued but available in reproduction.In Appreciation of John Hinckley- Top
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Re: C2/C3 differential differences
Yes, if you are referring to the differential gear pinion shaft, the 1963 was GM #3830742 and was 23/32" OD. The 1965-79 shaft, GM #9776894, was 3/4" OD.In Appreciation of John Hinckley- Top
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