Alison Transmission Question

[DandMBerk]

On our new Berkshire 390 TS we have a 340 Cummins with an Alison 2500MH transmission. On the Arens transmission control the select side says the transmission has six gears. On the monitor side the it has never shown to go higher than fifth gear. Is this normal?
Also the control has a Mode button. When I push this button a light comes on but nothing happens. What is its function? Of course I have read the manuals and looked on the internet but can't seem to answers. Any insight would be appreciated. Thanks...Donn

[milzat]

I found this on another site.

Re: Question re Allison Transmission

[DandMBerk]

I have read on the Allison site the following:

Q: What does the MODE button do?
A: The MODE button may allow the driver to enable a secondary shift schedule or other special function that has been previously programed into the electronic control unit at the request of the OEM. For example, the OEM for a motorhome may have provided a secondary shift schedule for improved fuel economy. The name of the special function (ECONOMY) should appear on the MODE ID label adjacent to the MODE button. Pressing the MODE button activates the ECONOMY shift schedule and illuminates the MODE INDICATOR (LED). Other special functions which may be activated by the MODE button are D1 selection or PTO enable. The MODE button is also used to view diagnostic code information.

How is the MODE button programed?

[milzat]

Originally Posted by DandMBerk

How is the MODE button programed?

It's a FLASH program.