700r4 guru
Thread Starter
Instructor
Joined: Aug 2001
Posts: 102
Likes: 0
From: canada quebec
700r4 guru
need help
i have a 84 vette with a rebuild 700r4 on.
my problem is when i m in OD (4th speed)
and go over 1/2 throttle the trans down shift in D(3rd gear)
at any speed
tv cable?
any idea
84 vette 93lt1 motor carbed.hedders
99 vette wheel
308rwhp 344 rwt
12.89@108 mph
i have a 84 vette with a rebuild 700r4 on.
my problem is when i m in OD (4th speed)
and go over 1/2 throttle the trans down shift in D(3rd gear)
at any speed
tv cable?
any idea
84 vette 93lt1 motor carbed.hedders
99 vette wheel
308rwhp 344 rwt
12.89@108 mph
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
The trans shop probably just swapped a generic 700R4, off the shelf, rather than rebuild your Corvette core. The Corvette version of the 700R4 is the only 700R4 that will stay in overdrive at WOT. If the trans shop won't make it right, B&M and probably others market the GM 3-4 shift sleeve that has to be installed into the valve body to allow WOT in OD.
RACE ON!!!
RACE ON!!!
Racer
Joined: Jul 2001
Posts: 399
Likes: 1
From: Toronto Ontario
Originally Posted by CFI-EFI
The trans shop probably just swapped a generic 700R4, off the shelf, rather than rebuild your Corvette core. The Corvette version of the 700R4 is the only 700R4 that will stay in overdrive at WOT.
This issue has been beat to death on the forum...I'm on my 8th 700R4. My original 700R4 never stuck in 4th under WOT. None of the original trans rebuilds did either. I bought a "new" 700r4 from GM...it stayed in 4th at WOT. That trans was toast in less than 6 months. They replaced it under warranty. The "new" transmission didn't stay in 4th under WOT at operating temperature but would stay there when it was cold. GM won't touch this issue...don't get me started
After talking to a few people and reading posts about it, I would say the answer is ... it depends. It appears as though that part of the transmission design is sensitive to production tolerances, wear, fluid viscosity and temperature. You're lucky if you have one that sticks in 4th at WOT!
Burning Brakes
Joined: Sep 2004
Posts: 869
Likes: 1
From: Bradford Pa
it sounds like if i have any 700R4 issues i can turn to pete.....btw...i'm not THAT far away from you actualy...up in bradford pa here...
hopefully with the 2k i dropped on the mad dog unit ... it stands up to the 427 going in...
hopefully with the 2k i dropped on the mad dog unit ... it stands up to the 427 going in...
