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I have a chance to purchase a 77 full size chevy posie rear end. Question is, will this fit in a 66 chevelle housing? Both are 12 bolts of course. What other year chevelle or A body cars will the 77 fit into without any mods other than a proper set up. Thanks in advance Bill
 

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I'm pretty sure that the carriers are the same. Be aware of the spline count, but otherwise I think you've got a good one.
 

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I believe the passenger 12bolt rear was not made after 1972, replaced by the 8.5 10 bolt..not sure what the 77 has in it but I would assume a 10 bolt.

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70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
55 chevy prostreet
 

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I am sure the carriers do not swap. The truck 12 bolt (made through late 70's for sure) isn't the same as the pass. car 12 bolt.

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Steve

72 Chevelle SS402/4sp
 

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Well,
Since you'all are on the subject I was going to install a P/T unit in my 12 bolt from year one a friend of mine told me if I use my ring and pinion I should'nt have to worry about reseting the gears just check them they would be same, any sugesstions or comments,has anyone been there.
 

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69SSRat- in an ideal world, you wouldn't have to change anything, but unfortunately, the chances of a different carrier going in and using the same shims to get proper backlash and mesh pattern are slim to none, especially if it's an aftermarket posi unit.

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Steve

72 Chevelle SS402/4sp

[This message has been edited by SSteve L (edited 12-17-99).]
 
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