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700r4 vs th350

Discussion in 'The Garage' started by noho blazen, Nov 8, 2006.

  1. noho blazen

    noho blazen Registered Member

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    just woundering what to put in my blazer. right now i have a 392 stroker/700r4/241 man speedo/7'' in lift/38.5 boggers
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    the 700 and 350 trannys are basicly the same, the 700 is just a updated version with a lower first gear ratio and overdrive, if you have the 700 built right you shoudl be fine
     
  3. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    stick with the 700R4. more low end power and overdrive. nothing to think about. no swapping torque converters or tailshafts. My 700R4 holds up fine to 44's and trail use only. get a cooler, shift kit, and a better converter.
     
  4. KGsK5

    KGsK5 1/2 ton status

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    what kind of shift kit and converter are you running? my 700R4 is about to go and id like to fix it once and do it right.
     
  5. Avery4jc

    Avery4jc 1 ton status Premium Member GMOTM Winner

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    ditto

    -A
     
  6. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    trans specialty shift kit and a custom converter. my 700R4 was the first year. It has a different input spline then all the others. found that out the hard way. I bought a off the shelf one, installed it and had no engagement.

    I had to give them my stock converter so they could get the specs they needed. it was expensive. 2800 RPM stall, very tight. if you stand on the brake and slowly bring the revs up, when it hits, it hits hard and puts you in the seat.
     
  7. bowtiepower00

    bowtiepower00 1/2 ton status

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    The 700R4 is a good tranny if built right, but you can build a stronger TH350 for half the price.
     
  8. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    Please justify this. what makes it stronger? how is it cheaper?
     
  9. bowtiepower00

    bowtiepower00 1/2 ton status

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    The 350 is simpler, w/o a TV cable or lockup converter (in most cases). You can purchase a built 350 for under $1000, maybe a little over by the time you factor in a decent converter and big cooler. You can usually get one built locally for $500 or so. The 700 has the lower first and OD, which makes life on the highway easier. To build one capable of handling a torquey 392, you're going to have to build a pretty strong one, and a good lockup convertor (if so equipped). Bowtie overdrives and Art Carr build some of the best, they run $1500 plus. For heavy duty and towing use, a 400 is probably a better choice.
     
  10. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    a tv. cable couldn't be easier to hookup. a lockup converter is worth the one wire it takes to hook up. the fuel savings alone justify the few dollars more you pay to rebuild an extra gear.

    In stock trim the 400 is the strongest. After a rebuild the 700 is stronger then a stock 400. If the 700 wasn't strong they wouldn't have put it in corvettes. a 4L60E is basically an updated 700R4.

    The case could be made that a powerglide is a strong transmission and cheaper to rebuild then a 350. lets all move into the 20th century. Just the extra gear choices alone take some of the stress of the overall performance alone.
     

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