Possible Allison bug in 139?
Possible Allison bug?
Flashed a tune in my AL5 (which has been perfectly successful many time before) that I made a few minor TCC release/apply speed adjustments to and now I have no TCC function when in tow/haul and I can't figure out why, didn't even make any adjustments to any T/H tables. After discovering I had no TCC function, as a test I reflashed the last perfectly working tune back in and still have no TCC operation in T/H?
It had been a while since the last flash on the trans and between those points I updated from build 133 to the current build 139. Could it be a bug in the build 139?
Should I try a full flash? Never had to do that on this trans before but I'm not sure what to do next.
I'm including the tunes. First one is the one I ran for over a year that worked fine. Second one is the one I flashed in with the current 139 build that'ss caused the TCC issue and I also included the stock tune just in case someone wants to compare the two previous tunes with the stock one.
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