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

700R4 acting wierd need input

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Old 12-10-2006, 02:38 AM
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Car: Red 1984 Z-28
Engine: 4.8 LS
Transmission: 4L60E
Axle/Gears: 3.73
700R4 acting wierd need input

Well I started my car up today and back out of my drive way to go to work. I put her into overdrive and start down the street. Its still in first and as I am going along, it just keeps climbing up the rpms. It usually shifts into second at about 1500-2000. Well it never did and went all the way to 3000-3500 and then shifted. Mind you this was at like 10-15 miles an hour. So what does it do, chirped my tires. "Wtf is wrong with my car now..." is all I can think. I get on the road and drive to work. None of the other gears did this. Get stopped at a stoplight, and it does it again as soon as I start driving again. Shifts from first to second at 3000-3500.

Then tonight as I am leaving work, it works just fine. Doesn't shift wierd, nada. So basicly all I want to know is what happened? Thanks guys!
Old 12-10-2006, 06:22 AM
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Car: 1985 IROC
Engine: 350 TPI (block was swapped)
Transmission: 700r4 w/corvette servo
Axle/Gears: no idea
Check the transmission fluid level first off. Other than that, the other guys on this board should help you out. I dont know much about transmissions.
Old 12-10-2006, 01:53 PM
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Car: Red 1984 Z-28
Engine: 4.8 LS
Transmission: 4L60E
Axle/Gears: 3.73
Hmmmm, usually if I have low tranny fluid, my transmission will slip. But in this case, it didn't. It had power all the way up to when it shifted. It was like I was manually shifting, but I wasn't. I will still check how much transmission fluid I have. Thanks.
Old 12-12-2006, 06:33 AM
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Car: Red 1984 Z-28
Engine: 4.8 LS
Transmission: 4L60E
Axle/Gears: 3.73
TTT Still need to know why it did this.
Old 12-12-2006, 07:51 AM
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Car: 1985 z28 camaro
Engine: 305 lg4,edelbrock,3"air cleaner.k&n
Transmission: turbo 700r4 w/b&m megashifter
Axle/Gears: Stock.
I had that same problem and it turned out to be a valve body sticking,which was causing it.

Alicat.
Old 12-12-2006, 02:10 PM
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Once in awhile this can happen from a small piece of debris that can hang up a 1-2 shift valve or other valve. If it fixed itself, I would not worry about it. What is the condition of the fluid? Was the fluid level low?
Old 12-12-2006, 04:30 PM
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Car: Red 1984 Z-28
Engine: 4.8 LS
Transmission: 4L60E
Axle/Gears: 3.73
Fluid is pretty new. Changed it out last time it went to the shop for the tailshaft housing seal to be replaced. It still has a small leak from the front of the transmission. The shop says they would have to drop the tranny though to put a new seal on. Other than that, the fluid might have been a little low. Thanks guys for the input!
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