Transmissions and Drivetrain Need help with your trans? Problems with your axle?

700r4 upshifts when in 1st

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Old Sep 21, 2003 | 05:24 PM
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700r4 upshifts when in 1st

My old man has a rebuilt 700r4 in his camaro (zz502) and he said when he drops it into 1 and does a break torque a few seconds into it it is still shifting into 2nd Also when he is downshifting it won't go into 1st unless he's going slow. He thinks it's how the transmission is supposed to work but I never had that problem in my 88. Do any problems ring a bell to any of you or is that what a built 700r4 does?
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Old Sep 21, 2003 | 05:34 PM
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From: Vereinigten Staaten
Car: Take
Engine: Your
Transmission: Pick
Most stock 700's do this. If you are one of the unlucky ones that have this, a TransGo reprogramming kit will fix it for good
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Old Sep 22, 2003 | 07:47 PM
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hmm, learn something new everyday. Thanks will that work even if you don't have a computer?
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Old Sep 22, 2003 | 07:48 PM
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ecm i mean
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Old Sep 22, 2003 | 07:57 PM
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From: Pueblo Co
Car: 1989 C4
Engine: L98
Transmission: 700r4
Axle/Gears: 307
Yes, it will still upshift without the ECM. Its a function controlled by fluid pressure in the valve body. I dont know if my old 700r4 did it before the kit but if you remove the MTV up spring it usually takes care of the problem. Some transmissions still shift to second even with the spring removed.
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