1. MikeD

    MikeD Well-Known Member

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    My 7-1/4 has quite a badly worn ring and pinion but i know where there's a better one very cheap but its 4 inch pcd and mine's 4.5, just wondered if my ends would swap over.
    Mike
     
  2. mvh

    mvh FABO Gold Member FABO Gold Member

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    "pcd"???

    Are you referring to wheel bolt pattern?

    I thought all 7-1/4 rears used small bolt pattern axles, on slant six cars even after 1973.
     
  3. Tooljunkie

    Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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    Nope, i put a 7-1/4” in in saturday. it had big bolt pattern.
    Diffs with same axle length will interchange.
     
  4. AJ/FormS

    AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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    The big bolt patterns have 3inch tubes versus smaller on the 4s, requiring matching shock brackets and U-bolts. Not sure about springs.
     
  5. MikeD

    MikeD Well-Known Member

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    The guy has all that stuff as well, i just want to know if i can swap my larger stud pattern parts, over to the other axle to avoid changing my draglites.
     
  6. AJ/FormS

    AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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    Not by themselves, with no other changes
     
  7. Kern Dog

    Kern Dog Well-Known Member

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    Sorry, this is not the case.
    All A-Body 7 1/4" axles used 2 1/2" axle housing tubes. The large bolt pattern versions were used in both Slant six and V8 models with front disc brakes.
    The U bolts were made longer for the 1967 and later models but the mounting plates are the same design from 1963-76.
     
  8. phatty67

    phatty67 Member

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    im working on a 67 cuda 273 with drum brakes all around it has a 9 bolt 7 1/4 27 spline and it has small bolt pattern. it was a restore a few years ago
     
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