Reply
 
Thread Tools Display Modes
 
Old 10-04-2018, 03:58 PM   #1
Bronze Member
 
valvegod's Avatar
 
Join Date: Aug 2018
Location: MI
Posts: 20
Default Any Interest in Chevy Express 10.5" Axle for Upgrade?

Anyone interested in a heavy duty 10.5" rear axle assembly (non locking diff) for their 2013-2018 Chevy Express 3500 Roadtrek? I picked up 2 which are basically new take outs (less than 5,000 miles) from a local GM program that I buy through. I am using 1 for my 2018, and have an extra. I also have access to 3 more. They are complete with rotors and sensors and calipers. This is the 3.54 ratio compared to the 3.42 that is in the 9.5" axle. You will need to have a dealer or programmer reflash for the axle ratio change which is a minor cost. These are impossible to find, as I have been looking for 2 weeks and all the salvage yards have them listed wrong and there is only 1 available in the country that I found. $1,000.00 plus freight or pickup in SE Michigan. I can also have the Carrier upgraded with an Eaton TRUETRAC if interested.
__________________

valvegod is offline   Reply With Quote
Old 10-04-2018, 07:47 PM   #2
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 7,131
Default

A point to note is that those ratios would be for the newer 6 speed models, not the 4 speed ones before 2010, which would take a 4.10 or 3.73 ratio. You could do a gear change, but I think you also would have to do a carrier change for that much ratio change.
__________________

booster is offline   Reply With Quote
Old 10-04-2018, 08:01 PM   #3
Platinum Member
 
Join Date: Nov 2015
Location: CA
Posts: 1,562
Default

Quote:
Originally Posted by booster View Post
A point to note is that those ratios would be for the newer 6 speed models, not the 4 speed ones before 2010, which would take a 4.10 or 3.73 ratio. You could do a gear change, but I think you also would have to do a carrier change for that much ratio change.
What does this axle change accomplish?
cruising7388 is offline   Reply With Quote
Old 10-04-2018, 08:13 PM   #4
Bronze Member
 
valvegod's Avatar
 
Join Date: Aug 2018
Location: MI
Posts: 20
Default

4:10 and lower take the same carrier so no change required if using on earlier models with 4L80e 4 speed.
valvegod is offline   Reply With Quote
Old 10-04-2018, 08:58 PM   #5
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 7,131
Default

Are they still using the Dana 70s and gov-lock if a locker?
booster is offline   Reply With Quote
Old 10-04-2018, 09:05 PM   #6
Bronze Member
 
valvegod's Avatar
 
Join Date: Aug 2018
Location: MI
Posts: 20
Default

To my knowledge they have not used a Dana in a long time my 2003 has an American axle 10.5 and these are all American axles. I do not know what they use from the factory for a locker these are open. Updating mine to a Eaton Trutrac
valvegod is offline   Reply With Quote
Old 10-04-2018, 09:28 PM   #7
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 7,131
Default

By 2004 they appeared to be using the Dana Super 70, or 70s model on the axle tag. I personally saw one in a 2004 anniversary edition a while ago that still had to OEM tag on it. I bought a 10.5" from a bone yard in Maine for our 07 190 and it was a Dana. When I was looking for an axle, I found several references to AA axles in the vans, but never found one in my searches. All the 10.5" ones were Dana 70s on ebay and on Hollander. The previous version Express that had the drum brakes in the rear used a 10.5" that was said to be a corporate version, but it also could have been a rebadged AA.


If you have access to the parts books, it would be interesting to find out what came in what years.
booster is offline   Reply With Quote
Old 10-06-2018, 01:06 AM   #8
Platinum Member
 
Join Date: Nov 2015
Location: CA
Posts: 1,562
Default

Quote:
Originally Posted by booster View Post
By 2004 they appeared to be using the Dana Super 70, or 70s model on the axle tag. I personally saw one in a 2004 anniversary edition a while ago that still had to OEM tag on it. I bought a 10.5" from a bone yard in Maine for our 07 190 and it was a Dana. When I was looking for an axle, I found several references to AA axles in the vans, but never found one in my searches. All the 10.5" ones were Dana 70s on ebay and on Hollander. The previous version Express that had the drum brakes in the rear used a 10.5" that was said to be a corporate version, but it also could have been a rebadged AA.


If you have access to the parts books, it would be interesting to find out what came in what years.
I understand Hondo's 4WD conversion on his 210 making practical use of the increased capacity of a full floating axle but if using the coach under conditions for which it was designed, this seems to me to be an expensive and laborious conversion to address a non-existent problem. How many people in the entire history of Roadtrek Chevy production have suffered rear axle failures?
cruising7388 is offline   Reply With Quote
Old 10-06-2018, 01:11 AM   #9
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 7,131
Default

Quote:
Originally Posted by cruising7388 View Post
I understand Hondo's 4WD conversion on his 210 making practical use of the increased capacity of a full floating axle but if using the coach under conditions for which it was designed, this seems to me to be an expensive and laborious conversion to address a non-existent problem. How many people in the entire history of Roadtrek Chevy production have suffered rear axle failures?

Our 9.75" axle failed twice within the first 20K miles in our 2007 190P.


With the full floating 10.5" axle our rear hubs, wheels, and tires also run much cooler with less pressure change from the extra heat.
booster is offline   Reply With Quote
Old 10-06-2018, 02:08 AM   #10
Platinum Member
 
Join Date: Nov 2015
Location: CA
Posts: 1,562
Default

Quote:
Originally Posted by booster View Post
Our 9.75" axle failed twice within the first 20K miles in our 2007 190P.


With the full floating 10.5" axle our rear hubs, wheels, and tires also run much cooler with less pressure change from the extra heat.
The two failures were identical?
__________________

cruising7388 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 05:33 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.