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Hot Rods Chevy 250 / auto

Discussion in 'The Hokey Ass Message Board' started by 36roadster, Dec 10, 2016.

  1. What auto would be behind a 250 in a 1975 Chevy Nova? I am looking at an engine/trans swap into a 47 Chevy.
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    Probably the light duty version of the TH350. They don't have quite as many clutch plates as the V8 version.

    If it's original, that is.
     
  3. mr.chevrolet
    Joined: Jul 19, 2006
    Posts: 7,915

    mr.chevrolet
    Member

    would that be the Metric 200?
     
  4. steinauge
    Joined: Feb 28, 2014
    Posts: 1,507

    steinauge
    Member
    from 1960

    I dont believe so .The 350 is a non overdrive trans.Another one that will work is the aluminum powerglide but you will likely like the 350 better.
     

  5. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    No, not the 200. The one I'm talking about is a TH350, it's just a slightly different version than was used behind the larger engines. They saved a buck by using clutch packs with fewer plates.
     
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  6. many years ago i had a 1976 Chevy Nova with a 250 6 cylinder and th350. that transmission found it's way into a model A ford with a 283......worked just fine for many thousands of miles
     
  7. So it sounds like the bolt pattern on the 250 is the same as SBC? They are a rare engine here, so hard to get any info/measurements here.
    Thanks for the replies!
     
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    yes, the back of a 250 looks and fits just like a 1955-85 V8.
     
  9. 40Standard
    Joined: Jul 30, 2005
    Posts: 5,881

    40Standard
    Member
    from Indy

    turbo 350 tranny
     
  10. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,695

    56sedandelivery
    Member Emeritus

    There's a possibility it could also be a TH250; looks like a TH350, but has a band adjustment screw/nut just behind the cooler line ports of the transmission. Then again, it could also be a TH350C or a TH250C, with the lock up torque converter. I am Butch/56sedandelivery.
     
  11. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    I didn't realize they had the TH250 in 75...it could be.

    The lockups came along in 1979, so if it's one of them (with a 4 pin electrical connector near the shifter) it would have been swapped in.
     
  12. Paul B
    Joined: Sep 29, 2007
    Posts: 890

    Paul B
    Member

    I have a 250 out of a 74 nova it has a 350
     
  13. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    73 was the last year for Powerglide...
     
  14. flamin01a
    Joined: Jul 23, 2005
    Posts: 78

    flamin01a
    Member

    I have a 63 230 truck engine, and a 350 turbo trans from a v-8, can I put them together? flywheel, starter, etc?
     
  15. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    should work fine. Make sure the block is drilled for the starter before you get too far. Should be 2 or 3 bolt holes on the bottom of the block, on the pass side, at the back.
     
  16. belair
    Joined: Jul 10, 2006
    Posts: 8,801

    belair
    Member

    In case you guys haven't noticed, FOR THE MOST PART, (squirrel will know the exceptions) if it bolted up to the back of a SBC, it will bolt up to a 194, 230, 250 and 292. Once again, the interchangeabilty of Chevy parts makes life easy for us of the orange blood.
     
  17. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    The only differences have to do with the flywheel, the crank flange changed on small blocks in 86, and the 292 had two different designs, one normal, one with 3 dowels and 1/2" bolts. Also the 400 and 454 had weighted flywheels.


    And those early engine blocks that weren't drilled for starters.
     
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  18. belair
    Joined: Jul 10, 2006
    Posts: 8,801

    belair
    Member

    I told you...
     
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  19. jimmy six
    Joined: Mar 21, 2006
    Posts: 10,238

    jimmy six
    ALLIANCE MEMBER

    In 1970 I bought my mom a Nova with 250" 6 and automatic. It was a 200. It had 3 speeds and served her very well for 150k miles. I sold it to a friend whose daughter was going to college. It went on to run well over 200k miles with no major work of any kind. The trans recieved only oil and filter changes at 50k intervals.
     
  20. jimmy six
    Joined: Mar 21, 2006
    Posts: 10,238

    jimmy six
    ALLIANCE MEMBER

    Correction the trans was a 250...
     
  21. squirrel
    Joined: Sep 23, 2004
    Posts: 50,167

    squirrel
    Member

    huh, I thought they didn't make the TH250 trans until a few years later. Interesting.
     
  22. jimmy six
    Joined: Mar 21, 2006
    Posts: 10,238

    jimmy six
    ALLIANCE MEMBER

    Jim your right on that 250's did not arrive until 74. Must have been a 350.. No wonder it lasted so long with no problems.
     

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