Alison transmission
 

Alison transmission

Started by tekebird, April 15, 2007, 06:41:39 PM

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tekebird

Question:  Ont hte Push Button Allisons.

From N the back arrow is Reverse.

What is the forward arrow sequence of shifts.....I don't recall and am looking at a bus that the display is inop

TomC

Typical is R-N-D-3-2-1 for an Allison HT740 4 speed.  The shift is 1st converter, 2nd converter, 2nd lockup, 3rd lockup, 4th lockup.  All start in 1st and whatever gear you select will be the ultimate top gear.  WARNING-if you overspeed in say 2nd gear, it will upshift to 3rd, even 4th to save the engine.  Good Luck, TomC
Tom & Donna Christman. 1985 Kenworth 40ft Super C with garage. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Jerry32

If you have a pushbutton allison you have R & D and arrows  and N.
1988 MCI 102A3 8V92TA 740