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

700R4 2-1 downshift.

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Old Jun 4, 2011 | 11:14 AM
  #1  
chazman's Avatar
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
700R4 2-1 downshift.

Brief review. I bought my '83 Crossfire after the previous owner had a shop do a trans rebuild with a "Corvette servo". Upshifted earley and shifts were all stacked on top of one another. Adjusting the TV helped. But thanks to the help I got here, (no help from several local trans shops who were only interested in a rebuild), I had the governor replaced with a "Corvette governor" and we are 95% better.

Okay, fast forward. Sometimes it doesn't downshift from 2nd to 1st when you give it WOT the way that I think it should, and the car is caught flat footed, lugging in 2nd. My 2.93 geared Crossfire needs all the help it can get. Short of putting in a shift kit, how can I address this?

Oh one more thing...

I replaced the stock LU5 exhaust manifolds with L69 HO exhaust manifolds recently, and I may be imagining it, but it seems more noticeable now.

Last edited by chazman; Jun 4, 2011 at 11:36 AM.
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Old Jun 4, 2011 | 12:01 PM
  #2  
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From: Nowthen, MN
Car: 87 monte aerocoupe
Engine: 383 HSR w/ novi 2000
Transmission: Built 4l80e circle d converter
Axle/Gears: Currie 9" 3.89 gears
Re: 700R4 2-1 downshift.

I would try to tighten up the detent cable a little more. After my rebuild, I adjusted it per instructions, but he said to go tighter yet to fix the exact prob you are having because I had the same issue.
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Old Jun 4, 2011 | 12:12 PM
  #3  
Rob 70's Avatar
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From: Dunnigan, Ca
Car: F250,83 diesel, many more
Transmission: 4R100, 700R-4
Axle/Gears: 3.73, 3.42
Re: 700R4 2-1 downshift.

Tighten the cable a little more and that should fix it and make it hold the gears a little longer.
Rob
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Old Jun 4, 2011 | 12:48 PM
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chazman's Avatar
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Joined: Dec 2001
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 700R4 2-1 downshift.

Originally Posted by dellman83Z
I would try to tighten up the detent cable a little more. After my rebuild, I adjusted it per instructions, but he said to go tighter yet to fix the exact prob you are having because I had the same issue.
Originally Posted by Rob 70
Tighten the cable a little more and that should fix it and make it hold the gears a little longer.
Rob
Yeah, I think I'll try that.


Rob, it shifts up perfectly now. It's just the 2-1 downshift which I don't always get.
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Old Jun 4, 2011 | 01:06 PM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 700R4 2-1 downshift.

http://www.tvmadeez.com/article/index.php

Read and understand, all your questions will be answered
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Old Jun 4, 2011 | 06:03 PM
  #6  
Rob 70's Avatar
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Joined: May 2011
Posts: 29
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From: Dunnigan, Ca
Car: F250,83 diesel, many more
Transmission: 4R100, 700R-4
Axle/Gears: 3.73, 3.42
Re: 700R4 2-1 downshift.

I like the artical it does a good job explain how to set the cable up.
Rob
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Old Jun 4, 2011 | 06:25 PM
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sofakingdom's Avatar
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Car: Yes
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Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 700R4 2-1 downshift.

It also explains what's going on inside the transmission, and how all the other parts are supposed to work; which is a gold mine of knowledge, in addition to just how to set up the cable.

A good example of what the Internet COULD be if nobody but knowledgeable people were allowed to write such things.
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