Thread: Allison 6sp: Lbz 2wd to 4wd questions!
View Single Post
Old 09-09-2019, 03:20 PM
2004LB7's Avatar
2004LB7 2004LB7 is offline
Join Date: Dec 2010
Location: Norcal
Posts: 2,044


I think it was from being unable to send the 4lo signal down the can bus or whatever it used to tell the modules it was in 4lo. Unless you hooked up all of the components, switches, modules, etc 4lo was pretty much a no go unless you are fine running with ABS and other lights on

I think all the BCM, TCM and anything else involved is programmed with the 4WD calibration. It just never goes into it without all the required hardware

There are others here that understand this part much better than me. We should wait for them to chime in
2008 Chevrolet 3500HD DRW LTZ
285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L.

2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm
Reply With Quote