Allison Transmission Question
I'm still confused what it means when your shift control panel has a reading like 6 5 or 6 4. I was climbing a steep grade and it downshifted to 2 4. What does that indicate? I figured I just had ge...
Forum Discussion
Correct.
But when climbing (i.e. on the throttle) it will never read 2 4. If you are NOT on the throttle and have the exhaust brake ON and have a 2nd gear pre-select (the gear the transmission sifts toward with the exhaust brake on) that is reasonable.
It means the transmission will continue to downshift until it reaches second gear and will do so as soon as it can downshift a gear at a time without overspeeding the engine.
But when climbing (i.e. on the throttle) it will never read 2 4. If you are NOT on the throttle and have the exhaust brake ON and have a 2nd gear pre-select (the gear the transmission sifts toward with the exhaust brake on) that is reasonable.
It means the transmission will continue to downshift until it reaches second gear and will do so as soon as it can downshift a gear at a time without overspeeding the engine.
