2003 Ram 3500 4x4 Dually with the 5.9 Cummins
47re??
Backed up a slight grade in a driveway just like I did 3 times prior this morning and bang all reverse is gone...
I was empty with no load on the truck and only rolling about 2 mph...
At first I thought it disengaged from 4x4 back to 2wd high...but it was still in 4 wheel drive...
Made it around the block and parked it not knowing what else to do...
The 1-2 shift seemed normal but I wasn't going fast enough to check the 2-3...
After researching it it sounds like either the servo...servo arm or worst case scenario the reverse band...
Someone told me to test drive it and see if the 2-3 shift is normal and if so it is probably just the servo or the servo arm...
How do I diagnose where to start...
Any and all advise appreciated...