Switched to synthetics over the summer, now the temperature drops down to 10 deg (F) and I have a whine when I let off of the go pedal. Not sure if it is trans or rear end. Is this normal given the temperature? I went with Vavoline at the weights rec by Dodge.

 

welcome to dtr. please use the user cp(top left) of your screen and fill out your sig so we know what we are dealing with. year, trans, 4x4?, long bed, etc. it makes a difference.

 

2005, 4x4, 3:73 long box.

 

Might be the U-Joints causing the whine. If so, just replace them with some good greasable units.

 

since it is a long bed, it has a carrier bearing on the driveshaft. while you are looking at the ujoints, check the bearing, possibly it is going bad, or something may be caught in it. i found a ratchet strap caught on mine, and polished up the driveshaft. it wasnt my strap, wonder where it came from?

 

I had a carrier bearing go out on mine which made that whine noise right behind rear door, dodge replaced for free.