Originally Posted by tmmar
So are you saying that you don't have the 'mode' function on your 2500 trans? I thought that it was part of the Allison transmissions that were put in our chassis. I will have to take a closer look next time I take my coach out and check it out.
Take a look at page 23. This indicates that the 'mode' function is built into the 2500 trans.
No, no..... I DO have the function; I just can't use it. The tranny and the shifter haven't been "taught" to "work and play well it others".
According to Allison CS, EVERY 2500 MH goes out the door with the CAPABILITY of a "secondary shift pattern" (mode). It's up to FL to program it (enable it) when they build the chassis. For some reason they didn't do it on mine (probably a Monday morning or Friday afternoon chassis)!!
The shifter (up front) contains the actual mode button as you know. In my case that shifter is made by Arens (OEM'ed); although it's branded as Freightliner on the bezel.
So yes, I my tranny is mode capable, my shifter has the button but the tranny has never been told to "pay attention" to the mode button.
The whole set up is known as a "shift by wire" system BTW. There are no mechanical linkages from the where you sit back to the engine (at least for shifting). It's all done with electricity.
I guess I'm making too big a deal on this, but again I like to keep my RPMs down as much as possible unless pulling a pretty good hill. And with fuel at $4 per gallon, an extra 1/2 to 1 and 1/2 MPH is a 10 per cent increase. I also want get into 6th gear at around 62 MPH; not 68.
And as far as trying out yours, you should be able to just start the coach in neutral and press the mode button. If the little red light comes on you have it.
Thanks for the link and your interest in my problem. I'd already downloaded that PDF file. Some good stuff in there, eh?