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

700R4 shift points

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Old Aug 9, 2009 | 11:41 AM
  #1  
70StingrayL46's Avatar
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Joined: Jul 2009
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From: Midwest
Car: 86 T/A T-top, LG4, auto
Engine: 305 LG4, CC Rochester 4BBL
Transmission: 700R4
Axle/Gears: also; 70 Vette, L46, 4 spd
700R4 shift points

Anyone have any idea's on how to adjust the shift points? My 700R4 is shifting 2/3 too late (too high a RPM) at WOT. Manual shifting obvisously doesn't help any because I'm not trying to get it stay in gear and shift at a higher RPM but at a lower one. The transmission is in good shape otherwise and shifts fine during normal driving. The only changes made to the drivetrain are a change from 2.73 to 3.42 rear gears but I'm unaware of how this could make a difference. Most of my other cars that I have worked on in the past have been manual transmissions so I'm a little out of my element here.
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Old Aug 9, 2009 | 06:39 PM
  #2  
Pro Built Automatics's Avatar
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Joined: Jul 1999
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From: Calimesa, California, U.S.
Re: 700R4 shift points

Where is it shifting now? And where do you want it to shift at? Dana
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Old Aug 9, 2009 | 10:49 PM
  #3  
skirkland1980's Avatar
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From: morrow, ga
Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: 700R4 shift points

make sure that tv cable is properly set. i have the same problem. i drag raced mine for the first time and it didn't want to shift. cost me the race cause i was winning
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Old Aug 10, 2009 | 02:37 PM
  #4  
Chris Etemadi's Avatar
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Joined: Oct 1999
Posts: 548
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From: Dallas, Texas
Car: 1991 Z28
Engine: 5.3 Gen III SBC
Transmission: 4L80E NTC 258mm Stall
Axle/Gears: Trick Chassis 9" 3.50 S-Strac
Re: 700R4 shift points

Mine will not shift 2-3 at WOT when the cable is too tight. Just a click or two to loosen it up worked for me.
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Old Aug 11, 2009 | 10:40 PM
  #5  
ed o's Avatar
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Joined: Nov 2008
Posts: 356
Likes: 1
From: sacramento california
Car: 64chevelle/smokey trans am
Engine: 350 p600 pro charger/350
Transmission: 350/700r4
Axle/Gears: 3.36
Re: 700R4 shift points

you can't change individual gears shift points without affecting something else on an automatic unless it is computer controlled. you can make adjustments one way or the other to make things closer or better though. on a 700r4 the t.v. cable and governor springs/weights change the shift points. the t.v. is adjusted near the throttle body/carb, and the governor requires buying a kit for different springs and weights. both are easy enough though. NOTE"""""" there is a little spring that can be added to the t.v. and it can pull the cable more at idle and light throttle and collapses at wide open!!!!!!!!!!!!!!! a lot of people add this spring with a gear change....
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Old Aug 12, 2009 | 09:42 AM
  #6  
70StingrayL46's Avatar
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Joined: Jul 2009
Posts: 10
Likes: 0
From: Midwest
Car: 86 T/A T-top, LG4, auto
Engine: 305 LG4, CC Rochester 4BBL
Transmission: 700R4
Axle/Gears: also; 70 Vette, L46, 4 spd
Re: 700R4 shift points

Originally Posted by Pro Built Automatics
Where is it shifting now? And where do you want it to shift at? Dana

Currently it is shifting at about 4900 RPM at WOT. I would like that to be about 4400 or 4500...
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