Express, Savana & G-Series Vans Offered in both a full size van, or a large box truck, the Express is the modern GM workhorse.

Chevrolet Express
Platform: GMT Van

1991 g20 transmission overdrive problem

Thread Tools
 
Search this Thread
 
Old December 28th, 2021, 9:45 PM
  #1  
CF Beginner
Thread Starter
 
6kranch's Avatar
 
Join Date: Dec 2021
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default 1991 g20 transmission overdrive problem

Hi,
Last winter we rebuild our transmission on our 1991 g20 (Beauville) van since then i am missing the over drive. When i am driving up 100km/h and move from overdrive to regular drive no change in the RPM.
Fresh filter when rebuild the tranny and fluid level is up . It been working before i used a different tranny in the meantime of the rebuild.
Running out of idea why.
I did read that maybe a faulty temper sensor may cause problem is that true.
Thanks for ideas where to look .
Old December 29th, 2021, 3:51 AM
  #2  
CF Pro Member
 
William Kisselstein's Avatar
 
Join Date: Aug 2013
Posts: 602
Received 78 Likes on 74 Posts
Default

Is the TV cable set properly?

1991 is before electronic control of the transmission, so sensors and the like won't have any effect on it.
Old December 29th, 2021, 6:43 PM
  #3  
CF Beginner
Thread Starter
 
6kranch's Avatar
 
Join Date: Dec 2021
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default

not sure about it. How can i find this out or set it proper?
Thanks
Old December 29th, 2021, 9:04 PM
  #4  
CF Pro Member
 
William Kisselstein's Avatar
 
Join Date: Aug 2013
Posts: 602
Received 78 Likes on 74 Posts
Default

I don't know how you could even rebuild the transmission and not understand the TV cable or how it works.
Old January 19th, 2022, 12:12 AM
  #5  
CF Active Member
 
ray caldwell's Avatar
 
Join Date: Feb 2020
Posts: 136
Received 12 Likes on 9 Posts
Default

TV cable should be set with foot pedal. If shop set it by opening throttle with hand,then it may have been overset. Remove doghouse, mash tv adjustment button. Floor the pedal,release button. Easy peasy
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dave de VA
Express, Savana & G-Series Vans
9
March 18th, 2018 3:04 AM
Bew Hatesyou
General Tech
1
December 1st, 2017 9:46 AM
shadetreestewart
Express, Savana & G-Series Vans
5
July 14th, 2015 8:06 PM
iflytb9
Other
2
May 12th, 2014 8:36 PM
lunabyrd
Express, Savana & G-Series Vans
0
February 5th, 2011 4:51 PM



Quick Reply: 1991 g20 transmission overdrive problem



All times are GMT -5. The time now is 10:18 AM.