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Will the tranny hold??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Zack, May 31, 2000.

  1. Zack

    Zack 1/2 ton status

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    Okay guys I am thinking about getting a caddy 500 engine and building it up a little and sticking it in my blazer. The blazer will have a caddy 500, turbo 400 tranny (BOP blt pattern) NP205, dana 44 and corp 14 with 4.10 gears. Will the tranny be able to take all this torque? The torque will be about 517 ft lbs and have about 383 horses. I want to get this engine but don't wanna have to keep replacing trannies.. By the way I am a leadfoot so everytime i see a chick i am gonna roast em so take that into consideration!

    <font color=red>Zack Carlson</font color=red>
    <font color=yellow>Carlson@thestix.net</font color=yellow>
     
  2. Bigd

    Bigd 1/2 ton status

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    Of all the trannys you can use the 400 is the toughest and the strongest.If you do blow one you'll probably just have too have one rebuilt with performance in mind.
     
  3. Zack

    Zack 1/2 ton status

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  4. ken

    ken 1/2 ton status

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    Do chicks really dig it when you roast tires??? I thought only "Oakie" chicks liked that...well, anyways...the TH400 will be more than adequate for how ever big you build that 500 Caddy. There have been millions more hotter big block Chevies, up to 572 cubes, that have been mated to the 400 tranny. The tranny will not bolt up to a TH350 205 without an adapter. If you had a TH400 and 205 combo currently, you could remove the output shaft from the Chevy TH 400 and install it in the BOP TH400 tranny, which would then bolt to the 205.

    ken
     
  5. Zack

    Zack 1/2 ton status

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  6. turbo

    turbo 1/2 ton status

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    Nope
    350 is 4 bolts to rear extension or TC adapter
    TH400 is 6 bolts to rear extension or adapter.
    TH400 output shaft is larger diameter and higher spline count then Th350 output shaft.
    Therefore a input gear change in the TC is needed as well as the proper 6 bolt TC case adapter
     
  7. Casey 86K5

    Casey 86K5 1/2 ton status

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    You can get an adapter plate that will allow you to bolt your B.O.P style engine to a Chevy transmission. Jegs sells them for about $55. They are made by TCI.
     

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