My truck seems to shudder when there is pressure on the drive-line from a stop. It is a long box quad cab 2500 with the 5.7 and 545RFE.

When I push up on my yolk after the transfer case there is a little play there but no play in the U-Joints. I just got it back from the dealer, and they can't seem to find anything wrong with it. They say the yolk play is within spec from Dodge.

Trucks been great just the usual 3/4 ton stuff with a Dodge that can never be figured out. It seems like ever Dodge 3/4 ton I have owned has issues like this that no one can seem to figure out.

 

What does the rear diff look like inside? Has it been opened and inspected?

 

I have not open it up yet, but I only have 30K miles on the truck so I hope it would be fine. I have read on other posts and sites that even though my truck does not have the limited slip with clutches using 4 oz of Limited Slip Friction Modifier such as the one redline sales will fix this issue. It seems to be something to do with the LSD in the 2500 trucks.

I guess I will drain and replace my fluid in both the front and back and add 4 oz of this Limited Slip Friction Modifier to the back one.

Anyone else have some input on using this stuff?

 

Check the u-bolt nuts that hold the axle to the leafs

 

I used 4 oz of Limited Slip Friction Modifier from ATP, and that did fix it. I have seen this issue a lot on other forms where 3/4 tons are posted on more often.

 

Is your truck lifted? Could be from having tall blocks

 

All stock tires everything. The only thing that is not stock is the 14" magnaflow muffler.

 

Have you checked your front tires for tie rod, hub, and ball joint play? I had similar problem you describe and cured it with new tie rods. It always felt like I was on a washboard road when I was coming to a smooth stop.