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tranny blew up

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by tecton, Oct 2, 2003.

  1. tecton

    tecton 1/2 ton status

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    oh no!
    hehe...anywho, money is tight so im going from a 4spd down to a 3spd(turbo 350?). Anyway...what should i look to expect as to differences in the two performance wise?
     
  2. 84_Chevy_K10

    84_Chevy_K10 Banned

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    You should expect faster acceleration and not as good of fuel mileage with a TH 350. While it lacks the low 1st gear of the 700R4, the gears are closer together.
     
  3. MTBLAZER89

    MTBLAZER89 3/4 ton status Premium Member GMOTM Winner

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    I am getting ready to do this swap soon. I will let you know how it goes. Are you going to run the 208 or 241 still? That's what i am planning. I called Advance adaptors and they have a kit for $200 that gives you a longer output for the tranny and an adaptor so driveshaft lengths are not altered.
     
  4. tecton

    tecton 1/2 ton status

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    i hear its stronger, more reliable...is this true?

    and before, i could cruise at 65-70 around 1800 rpm...will this be possible?
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    1. Yes it's stronger and more reliable. Some may say that the later 700s are just as strong as the TH350 and that's all fine and dandy but a TH 350 costs $200-400 to rebuild vs. at least twice that for a 700R4.

    2. No you won't be able to cruise at 1800 RPM anymore unless you want to cruise at 40 MPH, but you should have never been cruising at that low of an RPM anyway so I doubt you'll care. You'll welcome the increase in power at highway speed.

    I suggest you flush your tranny lines throughly as well. Napa sells a flusher bottle.
     

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