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Old 05-05-2013, 06:02 AM   #1
Junior Member
 
Join Date: Mar 2011
Location: northeast ohio
Posts: 67
Car: 89 firebird formula
Engine: 5.7 carbed
Transmission: TH700R4
Axle/Gears: 9 bolt

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2- 700r4 trannys

Is there a "better" one in terms of years? I have one from a 1985 Camaro, and one from a 1991 Firebird. Also, i completely deleted the ecm, and wire harness, so i assume using the ALDL for the TCC lockup will not work,,,,correct?
Thank you!
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Old 05-05-2013, 06:50 AM   #2
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Join Date: Apr 2012
Location: Philadelphia,Pa
Posts: 134
Car: 1991 Pontiac Trans Am
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3:42

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Re: 2- 700r4 trannys

86-93,us considered the years gmt perfected the 700r4. Changes to the valvebody and added splines to input/output shaft from what I can remember.
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Old 05-05-2013, 06:52 AM   #3
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Join Date: Jun 2005
Location: Sydney, Australia
Posts: 1,365
Car: '86 TA
Engine: '74 350
Transmission: 700r4
Axle/Gears: 2.77

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Re: 2- 700r4 trannys

They were in continuous development thru the 80's, with some major changes in 87. Go with your 91.

The ecm will no longer control the tcc of course, but you should still be able to engage it by grounding the ALCL pin in 4th.
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Old 05-05-2013, 06:55 AM   #4
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Join Date: Mar 2011
Location: northeast ohio
Posts: 67
Car: 89 firebird formula
Engine: 5.7 carbed
Transmission: TH700R4
Axle/Gears: 9 bolt

Classifieds Rating: (-1)
Re: 2- 700r4 trannys

Quote:
Originally Posted by TreeFiddy View Post
They were in continuous development thru the 80's, with some major changes in 87. Go with your 91.

The ecm will no longer control the tcc of course, but you should still be able to engage it by grounding the ALCL pin in 4th.
Thanks for the info! So i can go the ALDL route with a switch even though the ecm and wire harness is gone?
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Old 05-05-2013, 10:09 AM   #5
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Join Date: Jun 2005
Location: Sydney, Australia
Posts: 1,365
Car: '86 TA
Engine: '74 350
Transmission: 700r4
Axle/Gears: 2.77

Classifieds Rating: (0)
Re: 2- 700r4 trannys

So long as the + feed from the brake switch to the tcc, and the return wire from the tcc to the aldl, are still there. Don't know if this is part of the removed ecm harness or not.
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Old 05-05-2013, 10:09 AM
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