Allison 6sp: built trans poor shifting

paint94979

paint94979

Beer Nazi
Sep 18, 2006
11,715
8
38
37
Personally you might be over thinking your tuning... Put in a 100% stock TCM tune first.
 
paint94979

paint94979

Beer Nazi
Sep 18, 2006
11,715
8
38
37
I'm very happy for you... Unfortunately after 1.5 years of 12.1 @ 115-116 I tried a molested TCM boom 11.9 because I was able to get the TC to lock before 66mph
 
CaptPhil

CaptPhil

Active member
Sep 10, 2011
1,012
0
36
Delaware
hondarider552 said:
#becauseLLY :rofl::hug:
Click to expand...

:roflmao:That's true. Mine went from a 12.48 to a 12.11 with the ONLY change being pulling out the shitty LLY TCM OS and loading a basically stock 01 TCM OS with raised shift points. other dsp changes got me to 12.05.

Truck would not shift right at WOT with the LLY TCM tune.
 
mike diesel

mike diesel

I'm alright.
Sep 6, 2012
4,005
0
36
SLC, Utah
CaptPhil said:
:roflmao:That's true. Mine went from a 12.48 to a 12.11 with the ONLY change being pulling out the shitty LLY TCM OS and loading a basically stock 01 TCM OS with raised shift points. other dsp changes got me to 12.05.

Truck would not shift right at WOT with the LLY TCM tune.
Click to expand...

I have heard from several people that an lly os is terrible. I have not had a single issue with mine. Shifts absolutely perfect. Now I'm curious to try an 01 os to see the difference.
 
disposablehero

disposablehero

used soldier
Mar 29, 2014
179
0
0
I do have a bt lockup box so lock up is commanded at 95%+ and in second gear. Was hoping that would cure my shifting woes. It does lock the TC but didn't fix the shifts. I'll try to match the rpm to speedo. See what that does.

Here is a side by side acceleration test with a buddy. His TB ss ran a 13.6 on crappy tires. He got it dyno tuned and added cutouts plus got new rubber. So I'd imagine he is around a 13.3-4. We were well over available/4 on this run.

http://youtu.be/zgTI4HfAB9I
 
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