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View Full Version : adjusting allison shift



dezzi
January 26th, 2010, 10:31 PM
Just wondering if their would be a way to make it shift a little harder on the up shift thanks.

bballer182
January 27th, 2010, 12:45 PM
Alli 6 speeds.

shift timing will quicken the shift effectively making it shift harder.

D5100-D5119
D5080 - D5099

be careful and think things through before you go messing with this stuff bad thing happen really quick if you don't know what you are doing.

D5120-5193 TAP presets
highly recommended not to be messes with unless you are a tranny builder.

MMLMM
January 27th, 2010, 01:42 PM
wont the shit speed relearn???

Why do you want it to shift harder? I would think speeding the shift up will only cause a tie up, which you will get a pretty firm bang from that I guess :doh2:

bballer182
January 27th, 2010, 02:23 PM
wont the shit speed relearn???

Why do you want it to shift harder? I would think speeding the shift up will only cause a tie up, which you will get a pretty firm bang from that I guess :doh2:

If you set base desired shift times D5080 - D5099 I can't see why it would relearn to anything other than the base desired shift times.

dezzi
January 31st, 2010, 04:20 PM
I checked the shift timimg and was told not to go below .2 seconds but looking at the setting it goes from 0% tps to 37.5% in the positive (0 ms at 0% than goes up to 90 ms and back to 0 ms by 37.5% tps) than from 43.8% tps to 100% it goes into the negative reading eg: 43.8% -50ms and by 100% it's at -200 ms. So alot of the readings are below .2sec(200ms) and don't know where to go from here.:help2:

justin123
February 1st, 2010, 09:27 AM
ive been told by many to not mess with the shift timing unless u wanna pick up parts on the pavement... idk i adjusted mine a hair but went back stock after talking to a few tranny people but i been thinking about reseting the trans to shift for like hard acceleration and turn adaptive learning off so it will shift by what it was designed to shift at under hard accel... idk if that makes sense but its a thought thats been crossing my mind the past 2 days havent looked into it yet... anyone have any insight on that plz share :-) thx

justin123
February 1st, 2010, 09:29 AM
I checked the shift timimg and was told not to go below .2 seconds but looking at the setting it goes from 0% tps to 37.5% in the positive (0 ms at 0% than goes up to 90 ms and back to 0 ms by 37.5% tps) than from 43.8% tps to 100% it goes into the negative reading eg: 43.8% -50ms and by 100% it's at -200 ms. So alot of the readings are below .2sec(200ms) and don't know where to go from here.:help2:

shift timing is adjusted in diffrent tables not just one for example say 3-4 at 100% is at -200ms well if u go to the 3-4 table...not the base shift table ... it may say +300ms under 100% throttle... that help any???