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Thread: Rear end Dimensions

  1. #21
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    I think Cnut will have some comments about the Corvette numbers when he returns. My experience is limited to C3 stuff.

  2. #22
    Registered Member chevynut's Avatar
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    Yes I thought I replied to this years ago. The C4 dimensions are all wrong. IMO these dimensions should be either to the wheel mounting surfaces or to the axle flanges, but all should be consistent. Whoever put this together obviously doesn't know how to use a tape measure, or he just assembled all of the bad info on the internet.

    early C4 is 62" wide

    late C4 is 63 1/4" wide

    Both dimensions are WITH brake rotors installed.
    56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension

    You can see my 56 Nomad build here http://www.picturetrail.com/chevynut

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  3. #23
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    Thanks Cnut, one of my buddies has a pile of 8 3/4 Mopars laying on pallets any takers on betting the Mopar numbers are equally out to lunch.

  4. #24
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    59.20 1962-1970 8 3/4 B-body Wrong, I just woke up a few weeks ago we were looking for a diff for his rat rod truck and one of these was 61.

  5. #25
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    Pontiac 9.3

    This may help someone.

    '57-'58 Pontiac housing dimensions 55" flange to flange (Olds is 54") - Axle length 29 1/2"



    '59-'60 Pontiac housing flange to flange 59 3/16" - Axle length 31-7/8”



    '61-'62 Pontiac housing flange to flange 57-7/8”



    '63-'64 Pontiac housing flange to flange 59-3/16” - Axle length 31-7/8”

    The '57 Pontiac and Oldsmobile housing are a direct bolt.

    The driveshaft will have to have the proper yoke installed/balanced to mate to the larger 1330 U-joint.



  6. #26
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    The Olds/Pontiac does not use a 1330 U-joint, it uses a 2R same as late 70s GM. My 56 runs a shortened 77 Cutlass driveshaft with the Cutlass joints in it.

  7. #27
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    It's been a really long time, but I don't think all used a 2R u-joint. Pretty sure the 3rd member in the one I had in a 55 had a Spicer, though I don't remember it being a 1330 either.

    shoeboxpaul's numbers don't seem right. 55" flange to flange on the bare housing seems to high for a 57 housing, as does 59" for a later one. And I don't think that 61-62 axles were narrower than 59-61 or 63-64.

  8. #28
    Registered Member BamaNomad's Avatar
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    55" is pretty close to the width of a '57 rear axle bare housing (I just attempted to measure one in my garage (although the bulge in middle for the gears makes it a little difficult to get an exact measure...

  9. #29
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    Rock Auto says Moog 534G U-joint fits Olds 1954-2002.
    Last edited by markm; 04-12-2021 at 12:40 PM.

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