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 Post subject: 3.23 gears for 7.25
PostPosted: Thu May 23, 2002 9:09 pm 
My question concerns the interchangability (is that a word?) of the gears from a pre '70's 7.25 to a 1980 7.25 rear end.

The following is copied from a July 2001 message:
-----
": Can 3.23 gears from an A-body 7 & 1/4 rear
Quote:
: diff be installed into an F-body 7 & 1/4
: rear diff? I would think that they probably
: would, but I don't know for sure, and I hate
: to assume.
:
: If someone would let me know, I would
: appreciate it.


The year(s) are important here. All "early" 7 1/4s used pinion "shims" where "later" ones used a crush sleeve and carrier bearing "adjuster rings". (started in 1970??) For an easy gear swap, you want to use the gears designed for the housing set-up you have.
DD "
-----
Does this mean swapping pre '70's 3.23 gears into my '80 rear would be impossible or just difficult?


bmazur@canada.com


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 Post subject: Re: 3.23 gears for 7.25
PostPosted: Fri May 24, 2002 10:30 pm 
Quote:
: My question concerns the interchangability (is
: that a word?) of the gears from a pre '70's
: 7.25 to a 1980 7.25 rear end.
:
: The following is copied from a July 2001
: message: -----
: ": Can 3.23 gears from an A-body 7 &
: 1/4 rear
: The year(s) are important here. All
: "early" 7 1/4s used pinion
: "shims" where "later"
: ones used a crush sleeve and carrier bearing
: "adjuster rings". (started in
: 1970??) For an easy gear swap, you want to
: use the gears designed for the housing
: set-up you have.
: DD "
: -----
: Does this mean swapping pre '70's 3.23 gears
: into my '80 rear would be impossible or just
: difficult?


Difficult because you would have to find (make) all the needed shims to get the mesh set correctly. Realize that it's been 30+ years now on a rearend that was not "liked" by most everyone. Can you say "hard to find parts"??

When it comes to rearends it's much better / cheaper to find the ratio you want in an assembled unit and swap the entire assembly.
DD


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 Post subject: Re: 3.23 gears for 7.25
PostPosted: Sat May 25, 2002 2:07 pm 
Quote:
: When it comes to rearends it's much better /
: cheaper to find the ratio you want in an
: assembled unit and swap the entire assembly.
: DD


Thanks for the reply, Doug. I'm getting to the point that I may decide to put an 8.25 in there anyway. I'll make that decision soon.


bmazur@canada.com


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