We welcome h2co-pilot to the Exclusive.....

[PARAGON]

Originally posted by PARAGON:
I am in the middle of looking this up but a thought out loud.

If the CV is gone and you are in 4 LO, the computer is not registering any wheelspin at the tire when it should be, so now the ABS and <STRIKE>TC</STRIKE> lights on the dash are on. Maybe as a result of the CV being gone. So then, the Electronic Brake Control Module is telling the Transfer Case Control Module to not allow any shifting.

I called an talked to a H2 tech and he can't see how the two are tied electronically. Not being a big believer in coinkydinks I just can't reason that the two aren't related.

But there is a Transfer Case lockout feature that is controlled on the Transfer Case Control Module. The TCCM controls everything to do with the t-case and is tied to the Class II. I'm thinking maybe the BCM is telling the TCCM to engage the lock out feature which will not allow voltage to flow to the t-case actuator thus it won't shift out of 4LO.

All that said, once the CV is fixed and it's driven around a little to clear the code, I'm thinking the t-case should then shift out of LO.