Questions

[Allison Expert]

I have been in the industry for 7 years, and specialize in the on-highway market. I have learned from the best and had training at the factory. I have access to the latest information from Allison, and am here to help answer any and all of your questions. Thanks, and look forward to speaking with you.

 

[dbarton291]

RE: Questions

Allison Expert - 12/1/2009 2:39 PM

I have been in the industry for 7 years, and specialize in the on-highway market. I have learned from the best and had training at the factory. I have access to the latest information from Allison, and am here to help answer any and all of your questions. Thanks, and look forward to speaking with you.

Great and welcome. Are you currently working at an authorized dealer or distributor? Your expertise should come in handy.

 

[H2H1]

Re: Questions

Thanks for the offer, I have an Allison tranny in my South wind, SO FOR NO PROBLEMS so let hope it stays that way
:laugh:

 

[Freeway Pete]

RE: Towing with a GMC 3500 Diesel

I tow a 12000 pound 5th wheel over the mountains on Vancouver Island annually. The GM brocheur says that the engine develops 650 ft/lbs of torque at 1600 rpm. I am wondering if I should shift the Allison transmission into 4-Low to tow the trailer up the steep hills, which would bring up the rpm to around 3000 rpm; or should I leave the transmission in 4-High, and keep the rpm closer to 1600 rpm, where the maximum torque is delivered.
Peter

 

[Grandview Trailer Sa]

Re: Questions

If you go into 4-Low, you will be in 4 wheel drive. You don't want to do that on a paved road.

Your transmission will pick the best gear to get over any hill. IF you want to manually adjust your RPM, go to the M position on your gearshift and use the +- button to change gears in the Transmission.

 

[LEN]

Re: Questions

When you shift from 4-high to 4-low you are not shifting the Allison transmission, you are shifting the transfer-case form high to low. Low is normally used for off road, gravel, ice or snowy roads or where xtra traction is needed at a lower speed not for highway travel. As Ken said leave the Allison transmission to do its thing or shift it to a lower gear to a better RPM for conditions.

LEN

 

[Allison Expert]

Re: Questions

You should be using the tow/haul mode on the shift selector. I appoligize for the delay. Have not been on in a while, but will make sure I get on at least once a week. dbarton291: yes, I do work for a dealer. We are a full service/overhaul dealer for Allison.....

 

[C Nash]

Re: Questions

Well Allison expert it would help to get a little quicker answer. 4 months is a long time to wait for expert answers.