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Worth rebuilding 700 R tranny?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by fortcollinsram, Nov 22, 2001.

  1. fortcollinsram

    fortcollinsram 1/2 ton status

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    It it worth rebuilding my 700 R4 tranny or should I look at a different tranny....I plan on rebuilding the engine to about 300+ horse power...would a rebuit 700 R stand up to that or should I look at a TH400 or similar tranny? Thanks for the help guys... P.S how much do you think I could pick up a 4L80E for at a junk yard? Later, Chris

    1987 Blazer K5, 4" Rancho Lift, 33" BFG AT, Dual Battery setup, AND MORE TO COME [​IMG]
     
  2. CaptCrunch

    CaptCrunch 1/2 ton status

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    getting a 4L80 to work will take some work as it is an electric controlled tranny. For a cheaper price I would get a TCI 700 or a Raptor 700R4. Both are bvery strong and many members have them. The combo you have planed is rather minor. One of my buds is a tranny revbuilder and he has a 700 behind his 500 hp BBC. Obviously he has quite a few mods but it can be done.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  3. 95 Silverado

    95 Silverado 1/2 ton status

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    it depends alot on how you use your blazer, if you do a lot of highway cruising to take advantage of the overdrive it is worthwhile. if the overdrive is not a big concern go with the stronger 400. A 700R4 can be built to survive, but a 400 can be built cheaper and it will still be as durable as the 700R4.The 4L80E would be quite expensive, as well as a complicated install as it requires it's own ECM and controls to work.
     
  4. Eric78K5

    Eric78K5 1/2 ton status

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    Have the 700R4 rebuilt using a good rebuild kit from company's like level 10, art carr, or TCI. I think you'll be much happier in the long run. And a 700R4 can be built to handle 450+ horsepower easily.

    Eric78K5
    K5-Because Size Matters!
     

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