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700R4 into my 3/4 ton Burb (big deal or not?)

Discussion in '1936-Present Suburban' started by 2nova2, Dec 6, 2002.

  1. 2nova2

    2nova2 Registered Member

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    Just like the subject line says, is it a big deal to swap to a 700R4 to my 3/4 ton Burb? Currently a turbo 400.
     
  2. Muddytazz

    Muddytazz 1 ton status

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    Personally, I would leave the th400 in there.
     
  3. u2slow

    u2slow 1/2 ton status

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    If you do, you essentially need a matched transfer case, (spline and adapter are different from TH700 to TH400) and possibly different length driveshafts.
     
  4. 2nova2

    2nova2 Registered Member

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    Thanks guys i think the 400 stays for now sounds like to much trouble.
     
  5. nevercomplete

    nevercomplete 1/2 ton status

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    Are you just looking for overdrive or what? The 400 is a lot stronger than the 700R4. I have a 700R4 in my sub, I would like to have a 400 for the strength, but I love my overdrive. Maybe someday I'll drop in a 4l80.
     
  6. 2nova2

    2nova2 Registered Member

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    Yea i was hoping to get the Rs down for economy, but i do tow and don't want to sacrafice reliability. Thanks for your comments /forums/images/graemlins/burb.gif
     
  7. nevercomplete

    nevercomplete 1/2 ton status

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    If you want over drive, you could try a 4l80. It's pretty much a 400 with an extra gear. I believe it was even offered on the '91 3/4 ton subs. This is what i want to do.
     
  8. BurbLover

    BurbLover 1/2 ton status

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    Just my $0.02 but I recently went from a 700R4 to a TH400. I currently tow a 17' camper, but am looking to upgrade to a bigger unit. The 400 is stronger & better designed for towing. After all, the overdrive is kind of a waste for it. Anyway, I'd agree with the other & stay with the 400.
    /forums/images/graemlins/burb.gif
     
  9. nevercomplete

    nevercomplete 1/2 ton status

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    I guess it depends on how often you tow and what exactly you tow. You could always go with a gear vendors overdrive, but they cost an arm and a leg.
     

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