susanvenditte@gmail.com Report post Posted November 7, 2018 I have a 2018 motorhome with an Allison transmission and Cummins diesel engine (340HP, 6.7L). The coach has 8,000 miles on it. My last two trips, the transmission light indicator has popped on after I travel 100+ miles. I then lose power. I was using the cruise control and would leave the cruise control on, even when it was not in use. When I removed the cruise control, the transmission and power all seemed ok. Until my last trip, when on the last mile of the trip (this was a 360 mile trip), the transmission indicator light popped back on and I started to lose power again. I also flat tow a 4,400 pound cross over vehicle. My trips have been in the Texas hill country and in Colorado. So there is never many flat surfaces. I typically would use the cruise control for the majority of my travel. I expect I need to take it to an Allison deal for service. There is a fright liner service center near me for this. I assume the warranty may need to be used. I am asking if anyone has had similar experiences or has any suggestions on service. thank you Share this post Link to post Share on other sites
wolfe10 Report post Posted November 7, 2018 susanvenditte@gmail.com, Welcome to the FMCA Forum. Don't know which Allison transmission/shift pad you have, but if yours has the ability, have you checked for diagnostic codes from the shift pad? Check in your Allison owners manual or on Allison on-line. Share this post Link to post Share on other sites
wildebill308 Report post Posted November 7, 2018 Welcome to the forum. I would think this is a warranty issue. Where are you located and what coach do you have? Bill Share this post Link to post Share on other sites
susanvenditte@gmail.com Report post Posted November 7, 2018 Hi Bill, I have a 2018 Forrest River Legacy, model 34A. I am located north of Austin TX. thanks! Jeff Share this post Link to post Share on other sites
wildebill308 Report post Posted November 7, 2018 Hi Jeff, Nice coach. I would take it in as a warranty item. I haven't dealt with any of the Allison shops there as I am in the FortWorth area. Someone may come along with a suggestion. Bill Share this post Link to post Share on other sites
five Report post Posted November 8, 2018 My suggestion is that if it's an Allison issue, don't take it to Freightliner. Share this post Link to post Share on other sites
wildebill308 Report post Posted November 8, 2018 I would call Inland Truck Parts and talk to them. 9000 E. Highway 290, Austin, TX 78724 inlandtruck.com (512) 454-1488 I don't know what your requirements are for geting it done as a warranty issue and would check on that. Inland is where I would recommend if you were up here, it is where I would go. Bill Share this post Link to post Share on other sites
