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Old 10-23-2019, 01:07 AM   #1
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Holiday Rambler Owners Club
Join Date: Aug 2012
Location: Oak Harbor, WA
Posts: 82
Allison 2500 5 speed and Arens controller

The past three years have been a continuous learning experience. I have finally figured out how to use my transmission in the mountains only by reading the Allison Users manual for the 1000/2000 transmissions. I still have some more to learn.

My biggest concern was my inability to keep the transmission in the gear that I wanted when in the mountains. As I would head up a long complex grade the transmission would hunt between the top three gears. I would select 4 on the Arens controller and the Allison would go into 4th when it wanted to and shift back to 5th when it wanted to. In reading the user manual I learned that if I selected 3rd the transmission would not go above 4th. Not intuitive but ok. If you select 2nd it won't go above 3rd. So now when I start climbing a long hill I can select 3rd and I can keep the MH humming along at 55. That was great--me happy.

Another thing that has bugged me since the engine was replaced is that the transmission wanted to flair between 3-4th and 4-5th. Just by accident I learned that selecting economy eliminated the flair. I can now start from a stop at full throttle and the MH shifts exactly like I would expect. This is confusing and I will have to go see the Allison tech.

And the last crazy thing it the display. I installed the Silverleaf system and I use it to monitor what the ECU and TCU are saying. When I select 3rd on the keypad and the transmission is actually in 4th the Arens display reflect 3rd selected and 4th actual gear. But the Silverleaf says 4th selected 4th actual gear.

Any comments or experiences from others is appreciated.

Thanks,
John
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2006 Holiday Rambler Neptune 37' - New Source Engineering Trailing Arms and REK
2013 Chevy Sparc Toad
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