how do you figure out which u-joint is going bad? i have looked for rust dust near the caps checked for squeaking... nothing.. i am pretty sure it is a u-joint cause it is doing the same thing as it did when i first was looking at buying the truck, and i told the owner to fix it and he put a new ujoint in it and it stopped.... It was fine up until i put 2" blocks on the rear... Does anyone know if the blocks need any degree of pitch to them for the pinion angle? My friend machined them out of steel and he said something about maybe having to put pitch in the block but just told me to try it and see... What is going on is that from a dead stop, as i slowly let out the clutch there is a shudder... and it is only when i take off.. It cant be the clutch cause it immediately started doing it after i put the blocks on the rear.... both u joints on the back driveshaft are greasable but the one between the carrier bearing and the t-case doesnt... so i am leaning towards that one but not sure... Thanks

 

Lift blocks typically have the amount of "shim" required for the amount of lift...are you sure you got them in correctly??

Does it have a two piece shaft? This is a typical issue with a carrier bearing...

Duhh, I need to read...the angle of the last shaft may need changed...you may need to build a block for between the carrier bearing and frame.

 

They were made by a friend at a machine shop.. There is no shims or pitch.. Both ends are 2" tall.. I'm not sure which would be better to do.. Have a pitch put on the blocks or have a block made for the carrier bearing...

 

I would guess you will need to do both to get the correct pinion angle AND lower the operating angle at the carrier...just my thoughts.

 

sounds like your carrier bearing needs shimmed.
i would take care of it quick otherwise you'll
be replacing that dang thing in fast order.

 

just went and put 2 piece of 3/8" steel since i didnt have just a 1/2" piece and no more shimmy!!! whoo hooo! Thanks guys. I think i may still have him put some kind of angle in the blocks, but as of right now it is fixed!!