Rear End Vibration

Good Morning!

I've got a 2018 TRD Off Road with a Rough Country 3" lift (RC coil overs in front), 33" Recon Grapplers on 20" rims. Road active suspension on the rear also. The truck has 68k miles on it.

So I get a vibration that seems to be coming from the rear when under load. If I'm not towing, it only appears when pulling out uphill or slightly uphill. It only lasts a few seconds. I tow an 18ft trailer with my KRX4 on it about once a month. It vibrates every time I accelerate from a stop when I tow, and only for a few seconds. I haven't checked the MPH when it stops, but I'm guessing maybe under 10mph.

Honestly I can't remember if it did it before the lift, but I don't think it did. I've had the lift for about 2 years. The RAS has been on since this past fall due to the drop in the rear suspension when I tow. It's not my daily, my wife drives it more than I do, but I'll try to get the MPH range of the vibration this weekend. Any advice would be greatly appreciated! Thanks!!

 

Sorry, I'm not gonna be much help in this matter. But welcome from TN!!

 

Carrier bearing? May need to shim it down to correct the angle for the lift.

 

Do you have a carrier bearing spacer installed? On a lifted truck you will get vibration when you accelerate from a dead stop if you don't have one.

 

Hhmmm, unless it came with the lift, which I didn’t install, then I’d say no.

 

It will look like this if you have one.

 

I’ll have to check. Been raining here in southern PA. Any recommendations on where to get these if I don’t have them? Thanks!!

 

Just went and looked, I do not have a spacer.

 

https://shop-coachbuilder.myshopify...kit-rear-lift-0-2?_pos=1&_sid=2d76807cd&_ss=r

 

Thank you for the info on everything!! I'll be towing the KRX next weekend and would like to fix this before then. I ordered the Rough Country set on Amazon. This should really have come with the lift kit...

 

I have one of those!! No vibration on take off.