Question about 1994 Chevrolet S-10

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A buddy brought me his headache.Its a 1994 GMC jimmy with the 4.3 vortec 4X4 that had a 4L60E he swapped out the 4L60E for a 700R4 from an earlier chevy.the tranny modual plugs are totally different.How do I get this 700R4 to shift the way it should?? thankyou

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  • napboy01 Jun 05, 2009

    nothing has been swapped out on this thing,what i got is a connector that hooked to a 4L60E and all the commputer stuuf is for that tranny,is there parts that i can pull off the donor truck to make this all work????? thanks !!

  • yadayada
    yadayada May 11, 2010

    did you swap out te PCM and the wiring harness, contact painless wiring for a workaround.

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  • Expert
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Get the correct TCM.

Posted on Jun 03, 2009

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  • Chevrolet Master
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The 700R4 is controlled by vacuum lines and throttle cable kick down linkage (TV) and need to be re calibrated to the engine as to being 4.3 or 5.0 to 5.7. Best thing to do is to get a transmission shop that knows how to custom install transmission like a speed shop. The TV cable adjustment on the 700R4 needs to be perfect. TV cable is used to set part throttle shift points, line pressure and if not set right will burn up the clutch plates due to low line pressure. Good luck and hope this helps. you going to need tools that most of us don't have, like to be able to measure and adjust the line pressure at different RPM. If you need more information, keep me posted and be glad to help.

Posted on Jun 03, 2009

  • Harvey N Tawatao
    Harvey N Tawatao Jun 06, 2009

    Sorry no, the 4L60E is electronically controlled by the ECM. The transmission has electric solenoid to shift the gears which is controlled by the ECM which get's readings from the TPS, CKS and CMS. The transmission's shift points and fluid pressure is also controlled by the ECM.

    The 700R4 is controlled by the TV cable from the throttle body or carb and through Vacuum pressure which needs to be set buy a really good transmission shop. It need to be near perfect or the transmission will burn it self up as to why GM went with the 4L60E around the late 1990 and that's is why most will swap transmission in to hot rods with the old 3 speed 350 or 400 turbo transmission.

    Good luck and keep me posted

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