So I just bought my truck about a month and a half ago and recently the rear end shudders while slow acceleration and while turning slow, and it’s starting to bother me, so if anybody has had this problem and knows what it is I’ll that would be nice!!!

 

Truck info wouldn't hurt.

 

I don't even need to know the info to bet he's got a limited slip rear end and when he turns the clutch packs are causing the shudder. Just like mine did until two days ago. I'm betting someone drained and filled the rear differential and didn't use enough friction modifier inside it. Hence the clutch packs rub. BUT info would confirm this, hoss!

 

It’s a 2011 f150, sorry guys thought I posted that!!

 

But wait, what kind of rear end? Not open diff I hope

 

What do you mean by open diff?

 

If its a limited slip 9.75 rear axle that is pretty normal for them, my 05 did it for the ten years I owned it. Fluid changes, friction modifier ect, nothing fixed it so I just lived with it.

 

How is can I tell what axel it is, my stickers are all wore off

 

I had this same exact problem with my 2003 F150. Ended up having to replace the rear differential with a brand new one which made the problem go away. Due to the labor involved, the shop would not use a used one.

 

So trucks have three main types of rear differentials. Open, limited slip (if they still make/call it that), and electronic locking with an open diff. Open allows the rear tires to independently turn and thus making a nice, smooth, shudder-free turn. Limited uses centrifugal forces to divert torque to the non-slipping wheel due to physics. They use clutch pads to do this, which need a special additive to work smoothly. Take a look on your door driver's side, you'll see a white sticker. Take a pic and send it here my friend