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  1. #51
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    Gail C. Cahall
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    Quote Originally Posted by superspirit View Post
    Awesome thread, Frank I thank you for all the information you have supplied. I have a question that has been partially answered in this thread but I need clarification for a 93. I am picking up a 93 truck with a bad 4l60e in it, I have a good 97 4l60e from a LT1 camaro. can I change the wiring valve body and separator plate from the 93 to the 97 and install the 97 trans in the 93 truck. I know this was answered for a 95 but need clarification for the 93. thanks in advance.
    You will have to change the pump assembly as well.
    Gail C. Cahall
    CAHALL PERFORMANCE TRANSMISSIONS

  2. #52

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    That's exactly what I thought would have to happen. thank you for the clarification.

  3. #53

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    Quote Originally Posted by Cahall View Post
    Yes. The '94 wiring harness has one less wire than a '95-up.

    Frank
    Frank, you can use a 95 trans in a 94 by adding the pwm wire from the pcm to the trans, and modifying the tune. 94- 95 pcms are the same.

    A 94 trans will work in a 95 with just modifications to the tune.

  4. #54
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    Nov 2012
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    Shaun
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    1994 Formula
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    Quote Originally Posted by steveh View Post
    Frank, you can use a 95 trans in a 94 by adding the pwm wire from the pcm to the trans, and modifying the tune. 94- 95 pcms are the same.

    A 94 trans will work in a 95 with just modifications to the tune.
    95 has pwm pump, 94 doesnt
    2021 Charger Scat 392
    1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot

    The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
    10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!

  5. #55
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    Gail C. Cahall
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    Quote Originally Posted by steveh View Post
    Frank, you can use a 95 trans in a 94 by adding the pwm wire from the pcm to the trans, and modifying the tune. 94- 95 pcms are the same.

    A 94 trans will work in a 95 with just modifications to the tune.
    Yes, the '94 and '95 PCMs have the same part number. The PWM function is part of the tune.

    Frank
    Gail C. Cahall
    CAHALL PERFORMANCE TRANSMISSIONS

  6. #56

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    Quote Originally Posted by SSlowBoat View Post
    95 has pwm pump, 94 doesnt
    Right, and difference between the 94 and 95 are the trans harness is 1 wire that controls the PWM solenoid in the 95 trans., and how the TCC tables are set up to duty cycle the 95 for the PWM.

    The pin is pin 6 in connector d, the blue connector on the PCM, to pin U on the trans. This ia a brown wire on 95's. Adding that wire on a 94 will allow usage of the 95 PWM trans when the TCC tables are modified to the 95 settings or whatever custom settings you want to try.

    It's a very easy mod to do.

    This is good info, opens up more choices for 94-95 LT1 owners. I run a 95 in my 94 this way. that I built, and it works great. I race weekly with my car.

  7. #57

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    Frank, can you edit the first post in this thread with this info for the 94-95 years? When I decided to build my new trans with the 95 core after I determined all I needed to do was add the wire and change the tune, I searched to see if others had done this and found nothing (probably because of my search strings), and found most say it can't be done.

    Thanks for sharing your many years of experience publicly. I learned a lot from your posts when i researched building my trans.

  8. #58
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    Shaun
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    @Cahall...
    2021 Charger Scat 392
    1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot

    The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
    10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!

  9. #59
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    Sep 2015
    Name
    Ed
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    1995 Camaro
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    Champlain, NY
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    Frank

    Read through all the posts and have one basic question. When replacing the 4L60E in a 1995 LT1 "F Body" can a 2WD 4L60E from a 1995 truck, Caprice or van be used?

    Thanks
    Last edited by 4586; 09-22-2015 at 07:44 AM.

  10. #60
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    Erik
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    79 Chevy G20
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    I have a 79 Chevy G20 van with a 400 and 3 speed trans. Am looking at a 85 700 R4 from my neighbor, would this be a direct fit or is there complications to be had?

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