Poor downshift with Cruise Control Cummins 275

[EasyDoesIt]

I have just taken possession of a 1998 Winnebago Chieftain with a Cummins 275 in the Freightliner Chassis and Allison 6 speed tranny. I know the 275 is not the powerhouse some of the newer coaches have BUT. I find that I cannot run the coach on cruise control with the selector in 6th gear as it will slow down to under 1400 rpm before downshifting on any grade. Even in 5th I must manually downshift if 4th is required. It seems to shift properly when not on cruise control. Is this normal or can it be reprogrammed?

[EasyDoesIt]

I have just taken possession of a 1998 Winnebago Chieftain with a Cummins 275 in the Freightliner Chassis and Allison 6 speed tranny. I know the 275 is not the powerhouse some of the newer coaches have BUT. I find that I cannot run the coach on cruise control with the selector in 6th gear as it will slow down to under 1400 rpm before downshifting on any grade. Even in 5th I must manually downshift if 4th is required. It seems to shift properly when not on cruise control. Is this normal or can it be reprogrammed?

[gmanatl]

I have a 1999 Chieftain with the Cummins 275 and Allison 3060 6 speed transmission. It is the same coach. If you get into hilly country you need to take the transmission out of economy mode and then it will shift down as necessary. In economy mode the transmission is designed to hold itself in the higher gears as long as possible. Try this and see if you can tell a difference. Good Luck!