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Cosworth Vega posi rear

Discussion in 'The Hokey Ass Message Board' started by narducci, Feb 6, 2008.

  1. narducci
    Joined: Jan 3, 2008
    Posts: 194

    narducci
    Member

    I can pick up a Cosworth Vega posi rear complete for free, is it worth the effort, is it usable in any form for a mild ( <300hp)powered rod?
     
  2. racer5c
    Joined: Nov 30, 2002
    Posts: 2,218

    racer5c
    Member

    Is the engine there too?
     
  3. narducci
    Joined: Jan 3, 2008
    Posts: 194

    narducci
    Member

    No just the rear end
     
  4. Model A Vette
    Joined: Mar 8, 2002
    Posts: 1,072

    Model A Vette
    Member

    The Vega rear is a 7.5 SIMILAR to other Chevy 7.5 rears but not the same. The gears and internal parts are different. The only good thing about them is that they are narrow.
    They held up in Vegas but remember the biggest tire they were offered with was a B 70-13. If you hook one up with some big tires I'm not sure if they would hold up.
    I ran the stock rear in my 72 V8 Vega but used some tall, narrow 13s. The engine was a 235 hp 327. It could smoke the tires for half a block but the rear didn't break.
     

  5. narducci
    Joined: Jan 3, 2008
    Posts: 194

    narducci
    Member

  6. zman
    Joined: Apr 2, 2001
    Posts: 16,595

    zman
    Member
    from Garner, NC

    Yes it's worth having, hell I'd just about pay to have it shipped to me... great for some of the smaller cars, wonder if it'd fit my Anglia
     
  7. Bphotrod
    Joined: Sep 19, 2006
    Posts: 271

    Bphotrod
    Member
    from da U.P.

    The early Vega rears were fairly limited in upgrades. The later Monza rears are very upgradeable with common s10 parts. I would take it for free though.
     
  8. FiddyFour
    Joined: Dec 31, 2004
    Posts: 9,008

    FiddyFour
    Member

    for free, even if its BENT its free!

    lookit the price of steel, then let us know where it is if you dont think its worth the effort
     
  9. leon renaud
    Joined: Nov 12, 2005
    Posts: 1,935

    leon renaud
    Member
    from N.E. Ct.

    Pick it up then Contact Zman he needs a rear to put under his 57 Anglia
     
  10. leon renaud
    Joined: Nov 12, 2005
    Posts: 1,935

    leon renaud
    Member
    from N.E. Ct.

    Z we think alike this went up while I was posting for him to grab it and contact you !
     
  11. narducci
    Joined: Jan 3, 2008
    Posts: 194

    narducci
    Member

    OK OK I went to look at it today. It is a perfect width ( 55")for the car Im building. I had too much crap in the back of the truck to pick it up. Its not going anywhere. A guy I work with bought a couple of 9" ford axles and this was thrown in. We help each other out and he said I can have it.
    It will be in the garage before Saturday!

    Thanks for the info, guys
     
  12. Shifty Shifterton
    Joined: Oct 1, 2006
    Posts: 4,964

    Shifty Shifterton
    Member

    Cosworths all used the 7.5 and a torque arm, even when the standard vega still used a 6.5

    They share parts with later 7.5s but you have to turn down the pinion to accept the smaller pinion bearing in the H body housing, nobody makes the H body specific R&Ps anymore. The housing should have a big ugly torque arm mount cast in.

    At any HP level you should look into a 28 spline carrier (26 stock) out of a late 7 5/8 S10/Fbody rear. And custom axles.

    Personally you couldn't pay me to scratch-build any kind of performance car around a 7.5. Broken a half dozen of those junk SOBs. My late model F body just keeps chewing thru clutch type posis because they're physically so small. And that car doesn't represent any of the ones I've broken, despite heading for it's 3rd carrier at 80K

    good luck whatever you choose
     
  13. OldSub
    Joined: Aug 27, 2003
    Posts: 1,064

    OldSub
    Member Emeritus

    I used a posi rear from under a Vega wagon under the 327 powered Vega I built about 30 years ago. I ran a stock size tires and could smoke them at will. I suspect it lived only because it never hooked up.
     

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