4low and tow/haul are reversed
I had read about this in a post before over at DP, but I made some changes to the shifts in 4X4 low range(table B) and found out that they change the shifts in tow/haul mode. And judging by the shift points it looks like the tow/haul shifts(table D) are actually 4X4 low. This was with an 02 OS in an ALLISON TCM for the DURAMAX. I switched back to the 01 and I will try and see if it is the same way or not.
OS-15172881 calibration-15172884
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
Well I checked my 01 OS and the 4X4 low and tow/haul are all reversed in it as well. I just have to remember that schedule B is for tow/haul and schedule D is for 4 low. Also as far as I can tell in all of the LB7/LLY TCM OS's I looked at the 2 are reversed if I compare the shift points in each OS.
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
Yeah the tables are not accurate. I mentioned this to Ross and Paul at SEMA. Table A is correct, but that's it. Tables B and up are messed up.
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