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700r4 won't upshift past second gear..

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Old 06-03-2014, 09:27 PM
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Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
700r4 won't upshift past second gear..

Like the title says, my 700r4 won't upshift past second gear, governor gear is in good shape.. shift linkage isn't the issue.. any other ideas? I'm planning to rebuild it but I'd like to figure out what is causing the actual problem so I don't have the same problem after putting it back togather..
Old 06-04-2014, 01:11 PM
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Car: '87 IROC
Engine: LB9
Transmission: TH700R4
Re: 700r4 won't upshift past second gear..

Need some clarification here.

When you say it won't shift past 2nd gear, does it just stay in second or does it feel like neutral when it shifts into 3rd?

Any recent modifications like a shift kit?

What's the TV cable connected to at the throttle body? Stock or aftermarket FI/Carb/TBI?

Was it shifting normally before?

Last edited by paulo57509; 06-04-2014 at 01:18 PM.
Old 06-04-2014, 02:35 PM
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Car: 1989 IROC LSX
Engine: 5.7 TPI - LS1 Forged by LME
Transmission: 700r4 - 4L60E
Axle/Gears: 3.23 - 3.73
Re: 700r4 won't upshift past second gear..

I would think shift solenoid without knowing anything else.
Old 06-04-2014, 04:19 PM
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Car: '87 IROC
Engine: LB9
Transmission: TH700R4
Re: 700r4 won't upshift past second gear..

Originally Posted by jazzdadss
I would think shift solenoid without knowing anything else.
There are no shift solenoids in a 700R4. Just one solenoid for TCC lock up.
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