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Allison keep alive memory..
If you are running 15W40? Is it cold there? I could see it shifting a little rougher when cold. Have you forced the trans to relearn the shift points? If this was an A0 I would suggest you check the trans throttle position sensor on top of the engine, as that can cause harsh shifting. But... -
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Allison keep alive memory..
On the A1 24v battery is p115 pins 15 and 16. The wire numbers are both 136. it comes from CB43. And you pretty much have to have it available and the Allison TCU uses battery power as the source for its + output control signals like the one used to power the Neutral start relay K26. If it... -
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Allison keep alive memory..
Then yours should be 24V. I can look at the diag in a few hours to confirm wiring... -
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Allison keep alive memory..
On the A0 they feed 12v via the VIM to supply the battery voltage to the TCM. I believe that comes from CB22. They supply 24v ign to the TCM via CB79. I will have to look at a diagram this evening to be sure about wire numbers. They feed 24v battery and ign to the TCM on the A1... What truck...