Oct-12-2016 10:28 AM
Oct-12-2016 07:57 PM
Oct-12-2016 04:12 PM
Ivylog wrote:
Not sure how much more money I'd throw at this possible problem until it gets worse... if it does.
Oct-12-2016 04:02 PM
Oct-12-2016 03:55 PM
usersmanual wrote:DanK wrote:wolfe10 wrote:
Assume you have checked the Allison for diagnostic codes with the shift pad. Any codes?
Yes I have, and when it was at the Allison service center they had a computer hooked up while driving the coach and that didn't turn up anything.
try and drive it as I do mine. On a long loaded uphill pull I manually select the gear that works best and leave it there till I get near over rev and then manually select the next gear
or I back off a bit and just maintain constant same RPM
Oct-12-2016 03:00 PM
rgatijnet1 wrote:
Have you taken it to the Cummins shop to see if the engine control module is sending the proper signals to the transmission?
Oct-12-2016 02:57 PM
usersmanual wrote:DanK wrote:wolfe10 wrote:
Assume you have checked the Allison for diagnostic codes with the shift pad. Any codes?
Yes I have, and when it was at the Allison service center they had a computer hooked up while driving the coach and that didn't turn up anything.
try and drive it as I do mine. On a long loaded uphill pull I manually select the gear that works best and leave it there till I get near over rev and then manually select the next gear
or I back off a bit and just maintain constant same RPM
Oct-12-2016 02:42 PM
Oct-12-2016 02:34 PM
DanK wrote:wolfe10 wrote:
Assume you have checked the Allison for diagnostic codes with the shift pad. Any codes?
Yes I have, and when it was at the Allison service center they had a computer hooked up while driving the coach and that didn't turn up anything.
Oct-12-2016 02:13 PM
wolfe10 wrote:
Assume you have checked the Allison for diagnostic codes with the shift pad. Any codes?
Oct-12-2016 02:02 PM
Oct-12-2016 12:27 PM
DanK wrote:
It's doesn't feel like an injector misfire because it feels like the trans is going through the motions of trying to shift, but wont. Your theory of the engine governor telling the trans to shift, but the trans is saying no because it still feels the load is logical to me, and would fit what I'm feeling.
Oct-12-2016 12:17 PM
Oct-12-2016 11:54 AM
DanK wrote:
Thanks all for your input. I'll try to answer all your questions in hopes to find out what is going on.
1. Yes I have followed the recommender service intervals and have changed out the fluid to Transynd as well as both filters. I also checked the fluid and it is correct.
2. I would agree that the transmission should stay in the lower gear until I reach the top of the grade, but what happens is it tries to upshift but doesn't actually upshift. So it goes into that range between normal shifts, but doesn't actually shift up or down. When it get's in that range it tries to shift every 1-2 seconds, so it jerky (my technical term) while it's in the mode.
3. Pedel is completely compressed when it happens, but also will do it if not completely depressed.
4. Correct that the Allison service center was not able to diagnose, but they were also trying to simulate it and because they could not get the conditions right, were not able to track down the issue. The one thing they said was that they thought it was because the engine was not powerful enough, but the power has not changed since I purchased the MH and again this is a new problem that came up about 1000 miles ago.
Oct-12-2016 11:41 AM