Sorry if this has been asked in the past. I have a 2003 (built Sept 02) Ram 2500 with the 5.9L (250) Cummins SMARTY JR programmed with an additional 70hp for towing and the 47re 4 speed overdrive auto running 3.73 in the diffs.
My issue is with towing my 26' enclosed car hauler and steep grades. In 3rd gear the diesel is cranking 2300rpm at 60mph. In overdrive it drops to 1800rpm at the same speed however on hills I drop revs and running below that I'm worried I'll burn up that tranny. The problem is the big jump or loss in power between 3rd and 4th. Any suggestions for mods to the existing tranny to help keep it all together and not grenade the tranny?
Thx in advance.