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Caddy 500 cu in how to adapt to chevy manual transmission

Discussion in 'The Hokey Ass Message Board' started by BIGRUDDER, Jan 12, 2009.

  1. BIGRUDDER
    Joined: Sep 6, 2007
    Posts: 21

    BIGRUDDER
    Member
    from SC

    I have a 500 cu in Caddy Motor and I would like to use a Tremec 5 speed manual shift.....does anyone know where I can find an adapter with the flywheel to do this with?
     
  2. twofosho
    Joined: Nov 10, 2005
    Posts: 1,153

    twofosho
    Member

    Look over at Cadillacpower.com/forum

    Someone over there will know.
     
  3. Juztyn00
    Joined: Jul 21, 2007
    Posts: 189

    Juztyn00
    Member

    Go here and get the flywheel and throwout bushing.

    http://www.cad500parts.com/catalog/page27.htm

    You need to machine out the crank a bit for a throwout bushing. I used a dremal with good results on my caddy 500.

    Then hop on ebay and find a BOP Adapter plate.

    Edit. I also had to "clearance" the original caddy starter A LOT to get it to fit under the manual chevy bell housing.
     
    Last edited: Jan 12, 2009
  4. cadtorque
    Joined: Jan 11, 2009
    Posts: 9

    cadtorque
    Member

    1st- you'll want to search for a buick, olds, or pontiac bellhousing. chevy is different and won't fit. MTS makes a nice flywheel (but you'll pay for it). you'll have to have the crankshaft flange machined for a pilot bearing, as no BBcaddy motors ever came factory with a manual trans. there are many other small but important details involved in this swap, but this should get you started.

    also, is it an aftermarket or stock manual trans? you may want to do some research on the torque/hp capacity of the trans. 600+ ft/lbs of a built up 500 in a heavy car will lay waste to most factory-stock 4 and 5 speeds.
     
  5. DRD57
    Joined: Mar 5, 2001
    Posts: 4,336

    DRD57
    Member

  6. bobbytnm
    Joined: Dec 16, 2008
    Posts: 1,783

    bobbytnm
    Member

    The BOP bellhousing show up on Ebay from time to time. The last time I saw one it went for a reasonable $50.

    The 500 is a fun engine

    Good luck
    Bobby
     
  7. superduper88
    Joined: Sep 13, 2007
    Posts: 214

    superduper88
    Member

    The others beat me to it, B.O.P. bell would be better than an adapter plate, IMHO, though both will work. Drill crank. Yep, guess it's been covered. BTW, cadillacpower.com is the place for caddy performance talk! I'm on that board too and there ain't nothing that hasn't been covered there, try a search for manual transmission swap. Theres a twin turbo setup floating around in the classifieds too, hint hint.....

    -John

    EDIT: Wait a minit, he said a Tremec 5 speed. Can those use a standard old school 4 speed B.O.P. bell? I don't know. Someone else???
     
  8. river1
    Joined: May 12, 2001
    Posts: 855

    river1
    Member


    i'll second mike for all the info you need.
    he's on the HAMB but i don't know his handle.

    later jim
     
  9. I put a Tremec in my 55. It will bolt up to an old school bellhousing. A Tremec is "conservatively" rated at 600 ft/lbs too.
     

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