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built 4L60 in a 91 1/2 ton?

Discussion in 'The Garage' started by 91GMCSuburban, Feb 11, 2004.

  1. 91GMCSuburban

    91GMCSuburban 1/2 ton status

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    What are my options?
     
  2. 91GMCSuburban

    91GMCSuburban 1/2 ton status

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    Re: 4l80 in a 91 1/2 ton?

    OK, found a thread that basically stated 4L80e is an expensive option. So, how about tough built 4L60 (700R4).
     
  3. 91GMCSuburban

    91GMCSuburban 1/2 ton status

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    Re: 4l80 in a 91 1/2 ton?

    ttt
     
  4. dhcomp

    dhcomp 3/4 ton status Premium Member

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    People say they hold up alright if you run them from the start with a HUGE tranny cooler, but not sure if that was referring to stock or modified rigs...
     
  5. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    First off, is the tranny already blown or is it in good condition still? If it is I would run it until it does blow because the 87' later th700's are decent trannies.

    If it is blown then take it to a reputable tranny shop that knows WTF they are doing. You should already have a 10 vein front pump, I would use an aftermarket sun gear(this is a weak link, you loose rvrse, 1st, and 3rd when the splines break loose from the shell), extra clutches in the 3/4 pack, kevlar clutches and bands if needed, modified valve body for more flow, late model rear sprag(another weak link, odopted part from a th350 when it was designed), late model accumulater springs, a good blueprinted torque converter with a billet center piece, and your choice between a corvette servo or shift kit. This is all that is done to mine that I can currently think of and I am very confident in it's strength because it has seen some rough use and has never skipped a beat. /forums/images/graemlins/waytogo.gif To give you a ballpark idea, my th700 is probably about as strong as a th400 with a good shift kit. /forums/images/graemlins/thinking.gif

    Oh and don't forget to run a good sized stacked plate cooler ALONG with your factory radiator cooler.
     

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