Ok I have been doing some research on this code as my dads threw it today and obviously under a hard run. It seems that under my research there were "several" instances where these trucks have a banks six gun on them. Is there something to this? Im still trying to learn allisons, is the six gun something that should throw this code so easy? It seems any time the truck is turned up on 6 it throws this code. Its not very often it gets flogged upon but when it does I guess this happens.

Or am I just being negligent and the trans needs built?

Also just talked to the old man again, and of course the tow haul wasnt on "well now that I think about it... No I dont think so... oops" So I that doesnt help but still.