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500 caddy

Discussion in 'The Garage' started by blazersnburban, Dec 10, 2006.

  1. blazersnburban

    blazersnburban Registered Member

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    when you put the 500 cad in these trucks, what trans do you use? the b.o.p. trans that has a short tailshaft and converted to a 4x4 trans?:confused:
     
  2. mattman4x4

    mattman4x4 1/2 ton status

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    If I put a 500 caddy in my truck I would use a TH400, and NP203 (its what I have already)
    just my though!
     
  3. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Get a BOP TH400 that came behind them from the factory. Rob the tailshaft and tailhousing from your current TH400 and swap it in. Other than the bellhousing, there is nothing about a BOP TH400 that's unique.
     
  4. blazinzuk

    blazinzuk Buzzbox voodoo Premium Member GMOTM Winner

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    They make an adaptor that will mate a Chevy bellhousing trans to a BOP engine I have one on my buick motor (came out of a chevy truck)
     
  5. diesel4me

    diesel4me 1 ton status Premium Member

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    yup...

    Those adapters can be had from Jegs or Summit Racing for about 70 bucks..they work OK,no need to swap a different tranny in for a 500 Caddy..I'd be easy on the accelerator if you had a TH350 or 700R4 though,the torque monster 500 could shred one if you beat on it!..

    Actually,you can use the original Caddy TH400,if you swap in a short 4x4 output shaft and tailshaft..a few guys I know are running 472's and 500's in 2wd trucks using the Caddy's original tranny,they have a super long tailshaft with a different bolt spacing on the tranny mount,different bell housing bolt pattern to match the Caddy block--but other than that are identical to a Chevy TH400 ..the OEM Caddy tranny's are pretty beefy--they used extra clutches,knowing they weighed 3 tons,and were likely to see hard use..:crazy:
     
  6. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Yeah, we noticed the extra clutches when we were rebuilding mine...we thought the rebuild kit might have shorted us clutches but Terry counted 'em and sure enough, there was 1 extra clutch in each pack.

    Also, sorry, you don't need the adapter, but I got a my caddy motor and th400 for $200 so it was more feasible for me to swap parts between transmissions rather than buy an adapter plate and TRY to run a 700R4 behind that monster.

    I can't wait to fire it. :D
     
  7. blazersnburban

    blazersnburban Registered Member

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    thanks for the replies guys...thinking about building a 500 cad for torque and was curious what you were doing to put them in.
    i didn't think the bop trannies tailshaft bolted off like the chevy's, but if thats the case sounds pretty much straight forward!
     

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