BAD vibration after raising ride height

[jacobm24]

In august I had a 2.5" leveling kit installed on the front of my 2wd f-250 and I didnt like how it still looked like a low rider compared to my brothers 4wd f-350. Today I installed an add-a-leaf kit (2.5") in the rear leaf springs and it looks great now but I have a serious vibration when accelerating up to about 20 mph. Is this a problem with the drive shaft length? Can I put shims under the carrier bearing to help out with what I am assuming is my drive shaft being too short? ( I saw this in a different thread but I couldn't remember what the reason it was done for.)

any input is appreciated guys, thanks!

[Zaairman]

Yes, you need to shim down the carrier bearing.

[jacobm24]

Originally Posted by Zaairman

Yes, you need to shim down the carrier bearing.

Thanks bud. I'm planning on just fabbing my own shim since I don't plan on lifting my truck any higher and I have the spare metal/time to do it. From what I've read, I think I'll need about 1/2" or 3/4" of a shim and I'm just going to use some spare 1/4" pieces I have laying around. hopefully this take care of the problem.

[jacobm24]

Forgot to ask.. Can I do this with the drive shaft still in place and just unbolt the carrier bearing?

[the trav]

yes you can do it with the driveshaft in place

[Zaairman]

It's as easy as it sounds... Unbolt the carrier bearing, insert shims, and bolt it up. It helps to have a friend to hold the driveshaft, but a jack and a block of wood would probably work too.

[jacobm24]

thanks guys! ended up taking 3/4" of shims so I got to play with the acetylene torch a few times!