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Looks like it's been a while since anyone posted on this thread, but I have questions.
In going over my recently purchased 1970 Z28 I found I do not have a COZ or COO coded differential. Sometime in the last 54 years the differential was swapped. It has also been re-geared to 3.55. What I have is something that may be of interest to the folks on this forum. Differential tube stamp: BW 0429 G2 - 4.56 12 Bolt April 29 Second shift, Detroit Axle Plant Casting Number: 3894860 NF - 1967 - 69 Camaro (also 68-70 Nova) Casting Date: D 189 - April 18, 1969 wheel mount to wheel mount: 60.00 inches = 1967-69 Camaro Research says the 4.56 was not available as a standard option in 1969 and was only available with a COPO 9511 option. The '69 housing is 2.5 inches narrower than the 1970 Gen 2 version. I will be searching for a correctly coded COZ housing for my 1970 Z. If someone has need of a 1969 BW coded differential housing, let me know. |
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#2
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P.M. sent.
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#3
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![]() Quote:
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Freddie 1969 Camaro RS/SS396 (427) 4 speed Last edited by big gear head; 11-07-2024 at 08:44 PM. |
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PeteLeathersac (11-15-2024) |
#4
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Looks like Freddie is probably correct. I measured the spring perches center to center and they are 45 3/8 - the correct distance for a 1970 Camaro. But the numbers on the tube and the housing don't lie; they are from a 69 Camaro. It is not hard to imagine that sometime in the last 54 years someone swapped the axle into my car and re-located the spring perches. There is a lot of years of paint and such on the differential, but I imagine if I got into it I would find the original perch locations.
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The Following 2 Users Say Thank You to Pat70Z For This Useful Post: | ||
big gear head (11-16-2024), PeteLeathersac (11-15-2024) |
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