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

lock up issues or unlocking issues

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Old 07-13-2011, 11:27 AM
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Car: 91 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: 3:73
lock up issues or unlocking issues

noticed the other day while in D once i let off the gas pedal going eg. 70k the rpms will drop to 900. once i hit the gas again it will return to the normal respective rpm. Now i also try this in OD and have no issue, if im crusing at 100k and let off the gas my rpms will stay where they should be eg. 2300rpms. this must be an electrical issue or silinoid? dont have much experience with transmissions. btw its a 700r4
Old 07-13-2011, 11:36 AM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: lock up issues or unlocking issues

In drive it's a problem with the overrun clutch, nothing to do with the TCC.
Old 07-13-2011, 11:38 AM
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Car: 91 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: 3:73
Re: lock up issues or unlocking issues

so it a transmission issue? what needs to be fixed?
Old 07-13-2011, 12:52 PM
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Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: lock up issues or unlocking issues

Transmission issue. Dana visits this board from time to time but he's a busy guy. You can contact him directly at http://www.700r4l60e.com/

They have Forum over there, online support form, and a tech line.

https://www.700r4l60e.com/store/help...us&mode=update

Dana is a great guy at troubleshooting stuff over the phone and he will sell replacement parts seperately so you only need to buy what you need not full kits.
Old 07-14-2011, 12:02 AM
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Car: 91 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: 3:73
Re: lock up issues or unlocking issues

well finally fixed my fuel problems this evening.
I do plan on bringing the car in for a check up tomorrow to the trans shop they built up my 700r about 8 years ago. still runs great except this little issue.

another question i have is if im not getting wot shifts at 5200rpms anymore what might be the cause? govener spring and weights. do these things wear out? at the moment the shifts are firm but only 4600rpms
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