Notices
Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
Sponsored by:
Sponsored by: DashLynx

2002 2500hd 8.1 allison not shifting right.

Thread Tools
 
Search this Thread
 
Old February 9th, 2010, 9:54 PM
  #1  
CF Junior Member
Thread Starter
 
gerkendave's Avatar
 
Join Date: Mar 2008
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default 2002 2500hd 8.1 allison not shifting right.

My father just bought an '02 2500 4x4 with the 8.1 and the allison transmission, it was delivered today from florida. The problem is that the transmission does not shift, he bought this on ebay talked to the guy everyday and the guy assured him that the truck went through all the checks and was serviced regularly, as a matter of fact he had the whole truck checked over before he loaded it on the shipping truck. The speedo does not work and the abs, check engine and park brake lights are all on. Just wondering what your guys thoughts were on this, thank you in advance
Old February 9th, 2010, 9:56 PM
  #2  
CF Junior Member
Thread Starter
 
gerkendave's Avatar
 
Join Date: Mar 2008
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default

Oh also the truck only has 130k on it never had a 5th wheel or gooseneck, and the guy has a hypertech programmer on it, i've already returned the tune back to stock and still the same symptoms, the battery is also a little weak, don't know if that matters with these trucks or not, thanks again
Old February 9th, 2010, 9:58 PM
  #3  
CF Active Member
 
racerx55's Avatar
 
Join Date: Apr 2007
Posts: 237
Likes: 0
Received 0 Likes on 0 Posts
Default

If the speedo doesnt work that will cause it to not shift being that the ECU doesnt see that its moving, speed sensor in the trans for that one, or maybe they ripped a wire off transporting it somehow.
Its hard to say what exactly is wrong causing all the lights to be on, but one of those causes is most likely why it wont shift, not a problem with the transmission itself.
Try a reset of the ECU, then youll have to get it scanned to see what codes are coming up.
Old February 9th, 2010, 10:22 PM
  #4  
CF Junior Member
Thread Starter
 
gerkendave's Avatar
 
Join Date: Mar 2008
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default

thanks racer, i had the same thought on the shipping company maybe getting a wire pulled off loading it or unloading it on the truck. The truck runs a 315 tire so i'm not sure if that would mess with the abs light or not
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
thompjs
Tahoe & Suburban
7
July 6th, 2015 11:18 AM
Nyxian
Silverado & Fullsize Pick-ups
3
June 6th, 2014 9:14 AM
chrisz71
Silverado & Fullsize Pick-ups
0
August 14th, 2013 1:42 AM
maxxman04
Silverado & Fullsize Pick-ups
4
July 29th, 2010 7:46 AM
lilrock
Silverado & Fullsize Pick-ups
1
September 8th, 2009 9:09 PM



Quick Reply: 2002 2500hd 8.1 allison not shifting right.



All times are GMT -5. The time now is 6:53 AM.