M939/A1/A2 ABS vs. Non-ABS Trucks - Page 8 - Steel Soldiers::Military Vehicles Supersite

Bighurt · 12-06-2011, 03:29

Quote:

Originally Posted by quickfarms

what year did they start adding abs to airbrakes?

1981

spicergear · 12-06-2011, 13:16

I think there are some things that are being overlooked. Take for example the REB kit that was available for the GMC 6x6 auto trans that converted it to full manual valve body. They made that transmission awesome but very, very positive to the point that you could stall it if you didn’t downshift for a stop.

On my M931A2 I will set the throttle faster while it’s cold because for the reason that it will drag then engine down to a point of near stalling as the shifting lags behind. Keep in mind that these trucks mostly had 15/40 engine oil in the Allisons which makes them act very differently. My truck after it warms up has much, MUCH better manners than when it does cold and will also come to a stop and take care of downshifting with not a hint of acting like it’s going to stall. The Allison is a very good transmission and I would be willing to bet that the guys that have already changed over to ATF from 15/40 won’t be telling us about their trucks stalling when stopping from the engine bogging down.

It's like thinking of a manual transmission... ...is it easier to stall your truck in 1st gear or 5th gear. 5th, right- so if the cold thick dumb oil is allowing the shifting to lag behind it stands a chance of stalling the engine as it drops to idle rpm and the tranny is still a few gears up.

emmado22 · 12-31-2011, 15:33

I hope someone downloaded all the stuff from https://www.absmodtrack.com/m939/upl...r%20Manual.pdf because now it is gone.... Right when we can use it the most.....

emmado22 · 12-31-2011, 15:33

I hope someone downloaded all the stuff from https://www.absmodtrack.com/m939/upl...r%20Manual.pdf because now it is gone.... Right when we can use it the most.....

emmado22 · 12-31-2011, 15:35

https://premiernorth.com/m939/upload...20Feb%2003.pdf