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V8 Colorado on 37s

7639 Views 27 Replies 10 Participants Last post by  DigEm
Hello 355 Fans,

I've been working for the last year or so on my 2010 Colorado Overland/Mild Trail/Daily Driver Project and was able to finally get it back on the road last Friday night!:th_woot:


Front HP Dana 44 re-tubed to passenger drop. ARB/4:88s
Rear SF 14 bolt with ARB (Both axles narrowed to 65" WMS)
3.8 Atlas T-case
12" ORI Struts
Metal Cloak JK radius arms
Xterra steering box (Soon to be ram assist)
K5 Blazer rear springs
37" Nittos on 17" Raceline beadlocks

I put a couple hundred miles on it over the weekend and it drives really nice.

This is where I need some help..

When I gutted the IFS and T-case I just unplugged the electrical connectors and let them hang. Now I need to figure out what I need to do to make the computer happy when it's in 4 low.

I ordered the Atlas with a switch kit so that I can get a contact closure when it shifts into low range, and I believe that the computer can be reprogrammed to accept the 3.8 gearing, but it would sure be nice to hear from someone who has done it, or has better electrical knowledge about how the electronic shift system works.

I've searched the net for any wiring info and didn't have much luck.

When I built the axles I went through a pretty good effort to make sure that I was able to have ABS sensors on all 4 wheels in hopes of preserving the ABS/Stabilitrac system. I can live without it, but I'd like to try to make it work since I have all of the components necessary.

I'm thinking that there should be a way to disconnect the electronic shift system and wire a signal through the T-case switch to let the ECM know when it's in 4 low.

Can anyone point me in the right direction?

Any help would be greatly appreciated.




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Impressive setup and great progress you've done there.
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