Transmission compatibility....

What engine is in the Ram? The Durango's 5.9L has the 46 RE trans behind it. Are they both 4x4?

Don

Not sure what engine is in the Doge Ram but it has Hemi on the side of it & yes they are both 4x4

If the truck says Hemi, then it has the 5.7L engine, and the 545RFE trans behind it. That trans won't bolt up to your 5.9L.

Don

Might be a pretty simple fix...you need to drop the pan and inspect things.
NO REVERSE (D RANGES OK)
1. Gearshift Linkage/Cable Mis-adjusted/Damaged. 1. Repair or replace linkage parts as needed.
2. Park Sprag Sticking. 2. Replace overdrive annulus gear.
3. Rear Band Mis-adjusted/Worn. 3. Adjust band; replace.
4. Valve Body Malfunction. 4. Remove and service valve body. Replace valve body if any valves or valve bores are worn or damaged.
5. Rear Servo Malfunction. 5. Remove and disassemble transmission. Replace worn/damaged servo parts as necessary.
6. Direct Clutch in Overdrive Worn. 6. Disassemble overdrive. Replace worn or damaged parts.
7. Front Clutch Burnt. 7. Remove and disassemble transmission. Replace worn, damaged clutch parts as required.

Gotta love the "when it breaks, throw it out" society we have now. Just fix what you have. "But the mechanic will charge me more than a used transmission costs." Uh huh. And then you get another basket case to figure out.

If you do drop the pan, don't forget the likely long overdue band adjustments spec'ed at every 30k.

Don