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Old 06-07-2016, 07:15 PM   #15
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Our 2016 Journey with ISL9 / Allison 3000 must have a very conservative shift schedule programmed. If I'm not "loading" the engine, it will shift up through to 6th gear in no time. Probably around 35 to 40 mph. Of course, when applying a load (foot to pedal) it shifts or downshifts proportionally.
Not saying this is right, but it's the way this particular drive train is set up. I only have 2,500 miles on it so I'm still getting accustomed to the nuances. Not at all like what our previous CAT C-7 and Cummins ISB were like.

cheers,
Joopy
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Old 06-07-2016, 07:34 PM   #16
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Originally Posted by BillJinOR View Post
I doubt it's much problem putting it in 4 it'll rev higher and not go to 5 or 6 so your wasting fuel . Since you're burning fuel anyway just start the gen and run the house air .. I do that on any hot day anyway. I let the Allison do its thing. One other thought is the chassis ac should be working fine at idle .. Perhaps it needs a charge or service ??
dash ac doesn't work at 120 degree abiant and idling around at 600 rpms..
I always run the gen and all 3 airs..nice when you come out of the restaurant

what I'm saying about putting it 4th it doesn't over rev in city traffic and slows down way eaiser...in fact in stop real good with just the brakes... but I have big 4 piston disc

when i'm driving around stop and go it doesn't take much throttle with 1200 tq to move this little coach...
I say little cause it's only 34' and that what every one else says

looks huge to me...
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Old 06-07-2016, 07:38 PM   #17
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so I've been reading the Allison manual and it say to pick a lower gear for driving around slow...
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Old 06-07-2016, 07:47 PM   #18
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Hey whippersnapper.....I think you need to slow down and smell some roses
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Old 06-07-2016, 07:55 PM   #19
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Driving a DP in the city...

My Allisons have all shifted smoothly and progressed thru the gears while keeping the RPM within a programed +/- of the max torque. 6th engages between 58 and 62 depending on if there is a grade down or up. If yours is otherwise, something is amiss.
In city traffic, D is perfect. Braking downshifts the tranny at the correct points. If yours doesn't, something is amiss.
195 to 200 is the normal range in all temperatures. If not, something is amiss.
Best wishes for a successful resolution.

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Old 06-07-2016, 08:08 PM   #20
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I let the Allison decide what gear it wants to use. Which ever it chooses is fine with me.
I would do this as well.
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Old 06-07-2016, 08:11 PM   #21
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Hey whippersnapper.....I think you need to slow down and smell some roses
I was just down your way ,how you been,,.. hope all is well
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Old 06-07-2016, 08:14 PM   #22
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I would do this as well.
all them California drivers moved to vegas... they gas it to pass you then dive in and hit the brakes...I my self would rather know that I'm set up to stop sooner..
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Old 06-07-2016, 08:52 PM   #23
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Allison is a smart transmission. I put it in "D" and let it do it's thing!

Absolutely, unequivocally wrong! You cannot just put these big vehicles in D and expect to get the best performance out of them.

The flaw in your thinking is that the Allison cannot ANTICIPATE anything. It can only react to something that has already happened. YOU, on the other hand, CAN anticipate what's coming and put the Allison in the right gear for the situation.

I always use 3rd or 4th in traffic, depending on the speed. I have my Jake Brake programmed so it does NOT attempt to shift to a lower gear, so the Jake becomes very usable in traffic to assist in nice, gentle slow-downs and stops.
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Old 06-07-2016, 09:32 PM   #24
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Absolutely, unequivocally wrong! You cannot just put these big vehicles in D and expect to get the best performance out of them.

The flaw in your thinking is that the Allison cannot ANTICIPATE anything. It can only react to something that has already happened. YOU, on the other hand, CAN anticipate what's coming and put the Allison in the right gear for the situation.

I always use 3rd or 4th in traffic, depending on the speed. I have my Jake Brake programmed so it does NOT attempt to shift to a lower gear, so the Jake becomes very usable in traffic to assist in nice, gentle slow-downs and stops.
I kinda figured it this way...I would never put it in 6th going 40mph if it was a manual..i'm smart enough to know when it's in too low or too high of gear
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Old 06-07-2016, 09:41 PM   #25
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Originally Posted by Rich-n-Linda View Post
Absolutely, unequivocally wrong! You cannot just put these big vehicles in D and expect to get the best performance out of them.

The flaw in your thinking is that the Allison cannot ANTICIPATE anything. It can only react to something that has already happened. YOU, on the other hand, CAN anticipate what's coming and put the Allison in the right gear for the situation.

I always use 3rd or 4th in traffic, depending on the speed. I have my Jake Brake programmed so it does NOT attempt to shift to a lower gear, so the Jake becomes very usable in traffic to assist in nice, gentle slow-downs and stops.
Hi Rich,
How do you program your jake brake to NOT downshift when applying the brakes? Do you have a jake brake or exhaust brake? and can either be programmed to do that?

cheers,
Joopy
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Old 06-07-2016, 10:26 PM   #26
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Driving a DP in the city...

I took my coach to an Allison shop and had them reprogram which gear was selected when the Jake Brake engaged. Changed it from second to sixth. It took about 30 minutes and cost about $40 as I recall. It is absolutely the best modification I have done to our coach, and there have been many mods.

Now when I slow down with the Jake engaged, it will shift down to the next lower gear when the RPM drops to 1,000. It makes the Jake Brake much more usable in every situation.

Our coach has a 2-stage compression brake, not an exhaust brake. I think this can be done on any coach with an Allison transmission.
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Old 06-07-2016, 11:16 PM   #27
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dash ac doesn't work at 120 degree abiant and idling around at 600 rpms..
I always run the gen and all 3 airs..nice when you come out of the restaurant

what I'm saying about putting it 4th it doesn't over rev in city traffic and slows down way eaiser...in fact in stop real good with just the brakes... but I have big 4 piston disc

when i'm driving around stop and go it doesn't take much throttle with 1200 tq to move this little coach...
I say little cause it's only 34' and that what every one else says

looks huge to me...
Your ride height looks low. Maybe that's why you bottomed out going to needles. May want to check that out.
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Old 06-07-2016, 11:43 PM   #28
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Originally Posted by Rich-n-Linda View Post
Absolutely, unequivocally wrong! You cannot just put these big vehicles in D and expect to get the best performance out of them.

The flaw in your thinking is that the Allison cannot ANTICIPATE anything. It can only react to something that has already happened. YOU, on the other hand, CAN anticipate what's coming and put the Allison in the right gear for the situation.

I always use 3rd or 4th in traffic, depending on the speed. I have my Jake Brake programmed so it does NOT attempt to shift to a lower gear, so the Jake becomes very usable in traffic to assist in nice, gentle slow-downs and stops.
Rich

I have the 3000MH but on mine it does not show what gear I'm in while in drive. In city driving my coach shifts almost like a car. Not quite but close enough where it's not lugging or overreving. I'm not sure how shifting manually under these conditions given how mine shifts would improve anything. In the hills or more importantly the mountains it's pretty much manual shifting all the way. What am I missing?
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