07-04-2016, 10:18 PM
Most Newells of your vintage used the Allison HT-740 which is a 4 speed. I typically only feel 3 shifts but you could be feeling a small bump as the torque converter locks up. I have been told that there were a few Newells built with the 8V92 and a HT-750, the 5 speed version of the HT-740 although I have personally never seen one. Newell has told me that the HT-750's tended to shift more abruptly so they stayed with the HT-740 until shortly after the change to the Series 60 when the 6 speed Allison was used.
1800-1850 at 65 mph is typically gearing in direct for the 8V92/HT-740 transmissions.
The Override switch is for the DDEC (Detroit Diesel Electronic Control). If the engine computer causes the engine to shutdown, pressing that switch will allow the engine to be restated to allow you to move the coach off the road. Be careful using that switch as you are now bypassing the safeties the engine computer uses to protect the engine from damaging itself.
1800-1850 at 65 mph is typically gearing in direct for the 8V92/HT-740 transmissions.
The Override switch is for the DDEC (Detroit Diesel Electronic Control). If the engine computer causes the engine to shutdown, pressing that switch will allow the engine to be restated to allow you to move the coach off the road. Be careful using that switch as you are now bypassing the safeties the engine computer uses to protect the engine from damaging itself.