Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Non Posi-rearend in a K2500 Suburban?

Thread Tools
 
Search this Thread
 
Old March 4th, 2014, 2:17 PM
  #1  
CF Beginner
Thread Starter
 
Rutnstrut's Avatar
 
Join Date: Feb 2014
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default Non Posi-rearend in a K2500 Suburban?

Why in the hell would GM do this? My 97 K2500 with towing package, comes from the factory as a one wheel wonder. Why would you build a heavy duty truck and not make it posi? Is there any benefit to having it be a non posi rear end. Other than the fact that the GM limited slips were not that great.
Old March 4th, 2014, 4:19 PM
  #2  
Administrator
 
73shark's Avatar
 
Join Date: Apr 2006
Location: KC, MO area
Posts: 10,900
Received 155 Likes on 153 Posts
Default

I believe the G80 Eaton locking (not clutch-type) rear end is an option for the lower models and standard on the LTZ. At least that's the way it was on the GMT900s.
Old March 4th, 2014, 5:46 PM
  #3  
CF Pro Member
 
intheburbs's Avatar
 
Join Date: Aug 2013
Location: SE MI
Posts: 997
Likes: 0
Received 20 Likes on 18 Posts
Default

Personally, I love the G80 locker. However, it's a bit on the fragile side and doesn't tolerate a lot of abuse. If you're the type that likes to do a lot of smoky burnouts or donuts, it's likely you'll break something. Moreso on the 3/4 ton trucks.

Chevy doesn't do Positraction-style rear axles in the trucks - meaning limited-slip with clutch packs. The G80 is a true locking differential. There is a difference.
Old March 4th, 2014, 5:58 PM
  #4  
Administrator
 
73shark's Avatar
 
Join Date: Apr 2006
Location: KC, MO area
Posts: 10,900
Received 155 Likes on 153 Posts
Default

Tested mine the other day when there was still some snow in the middle of the street. With one rear wheel on the snow and the other on pavement, it accelerated normally w/ no wheel spin on the snow. This was in 2WD. A posi rear would have accelerated at about half normal.
Old March 4th, 2014, 6:36 PM
  #5  
CF Senior Member
 
Joe In NY's Avatar
 
Join Date: Mar 2013
Posts: 406
Likes: 0
Received 1 Like on 1 Post
Default

Why not? The auto locker on our 07 is quite nice I must say. Turn traction off and as soon as you start spinning it locks up instantly. Great for drifting
Old March 5th, 2014, 11:18 PM
  #6  
CF Beginner
Thread Starter
 
Rutnstrut's Avatar
 
Join Date: Feb 2014
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

I don't have the G80 in my truck, just a plain jane one wheel wonder. This thing is the most uncapable truck I've owned. It gets stuck in two wheel drive on a flat surface and packed snow. The tires are in great shape also, so it's not like I have bald tires.
Old March 6th, 2014, 1:18 AM
  #7  
Super Moderator
 
SWHouston's Avatar
 
Join Date: Jul 2011
Location: Houston TX. USA
Posts: 1,545
Likes: 0
Received 1 Like on 1 Post
Default

Vehicles which carry heavy loads operate more efficiently with open type differentials.
It doesn't matter how new or how much rubber you have on a tire, if it doesn't have the proper tread (like for snow), any vehicle can have limited traction. That includes 4WD's and or with some sort of limited slip Diff.

If you want your Truck to deal with Snow, then put Snow Tires on it (at least on the rear).
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jrsavoie
Silverado & Fullsize Pick-ups
0
February 24th, 2010 2:38 PM
ibmer
Tahoe & Suburban
7
August 21st, 2009 10:01 AM
313hitman
General Tech
4
March 5th, 2007 2:44 AM
313hitman
General Tech
0
January 28th, 2007 1:17 AM



Quick Reply: Non Posi-rearend in a K2500 Suburban?



All times are GMT -5. The time now is 11:32 PM.