OK, so I fitted the other TCM (thingy that bolts to the side of the transfer case) thanks to hotqld and left my non-reflashed TCCM (thingy under the rear seat) in. The 'Service 4WD System' stayed on the dash and although the LOW light came up on the dash, it wouldn't engage into Low4. Tried my GDE tune box on it and no fault code came up.
Then tried my flashed TCCM with hotqld's TCM. 'Service 4WD System' is no longer on the dash...until Low4 is selected. Low4 would not engage and the 'Service 4WD System' stayed lit up on the dash.
Unbolted hotqld's TCM and installed my original one. Also swapped over the flashed TCCM to my second hand non-reflashed one. 'Service 4WD System' appeared straight away on the dash, but Low4 engaged every time.
So, I am back to square one, in that I have my Low4 back but that fu*&@ng 'Service 4WD System' is back in my face. Might have to use some trusty duct tape to cover the warning sign up.
Has anyone got any ideas??????????? before I go mad
woops, too late.
Cheers, Craig