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700-r4 lockup or non

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 85blazer350, Apr 26, 2002.

  1. 85blazer350

    85blazer350 Registered Member

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    Location:
    Grande Prairie,Alberta,Canada
    Ive just finished getting my trannie rebuilt (85) 700-r4 Now just have 1 more hour of work to do.The trannie guy said he could make it non-lockup with a cheater 2 t-converter for an extra $400 he said it would iliminate a lot of heat.Should I go with this or just leave it stock lock up.Any advise would be apprisiated. Im going to the shop on monday.
     
  2. Thunder

    Thunder 3/4 ton status

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    Leave the lock up style TC in it.
    Non lock up might work in some applications for a light car but not for a big heavy Blazer. Running it without a locked convertor will acually generate more heat when in overdrive because of slippage . Thats not what you want.
    You will also get better gas milage with a lockup convertor
    I think the tranny guy is giving you a line of BS to sell you a $400 torque convertor
    Heres a link with a lot of info on Lock up vs. non lockup: <a target="_blank" href=http://www.700r4.com/Tech/TCC/introindex.htm>700r4.com</a>
     
  3. ftn96

    ftn96 1/2 ton status

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    Ok, so if the TC is not gonna lock up and continue to slip, how is that gonna preoduce less heat? Ask the tranny guy that!
     
  4. bablazer73

    bablazer73 1/2 ton status

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    I think your tranny guy is a bit confused. or just b.s.ing to get mo money! the slipping of the converter is what causes the heat! no lockup in overdrive? way to much heat. will recook tranny.
     

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