Free Horshpowa(well almost)

[Buddy@MPD]

You may have to adjust the rear with a shim. Depending on what type of lift you installed on your truck, the new rear blocks are designed to have the corrected angle built into them, if you had a kit that was like that. If not you will have to shim the rear so that you raise the pinion angle up. Someone correct me if im incorrect please.

 

[a_moore]

I found that I could adjust pinion angle several degrees +/- with the traction bars. You just need to watch out when you load the truck heavily if you are setup for alignment at empty condition, it will bind the springs up pretty good. A simple pair of channel locks and it was easily adjusted.

 

[Corb@CorbinShipping]

If someone was to say, raise the back end up 3 inches, via going to a 5 inch block instead of using a factory 2 inch. And the shudder started at low speeds, and then smoothed out through the rpm band, then reappeared over 100. Do you think that this is a shim issue as well? we have shimmed the carrier and have the drive shaft straight as it needs to be. But the low speed take off shudder is still there. We haven't got to the dif yet. But reading this makes me wanna go check it now.

 

[Erikclaw]

If someone was to say, raise the back end up 3 inches, via going to a 5 inch block instead of using a factory 2 inch. And the shudder started at low speeds, and then smoothed out through the rpm band, then reappeared over 100. Do you think that this is a shim issue as well? we have shimmed the carrier and have the drive shaft straight as it needs to be. But the low speed take off shudder is still there. We haven't got to the dif yet. But reading this makes me wanna go check it now.

I had the exact same thing after lifting mine, just not over 100mph though. I was the carrier bearing. I had it lowered like everyone says, adjusted it twenty times and it would never go away. I went to a drive line with a cv in it and the carrier bearing back to stock height. Shudder gone. Or a one piece drive line, but my drive line shop wouldn't build one for "safety issues" so I went with the cv.

 

[Corb@CorbinShipping]

I had the exact same thing after lifting mine, just not over 100mph though. I was the carrier bearing. I had it lowered like everyone says, adjusted it twenty times and it would never go away. I went to a drive line with a cv in it and the carrier bearing back to stock height. Shudder gone. Or a one piece drive line, but my drive line shop wouldn't build one for "safety issues" so I went with the cv.

About how much did that run?

 

[PsRumors]

Here is a great page to walk one through the measurements and gives quite a bit of explanations.

http://www.4crawler.com/4x4/CheapTricks/Driveline-101.shtml

 

[PsRumors]

And another from Federal

http://pirate4x4.com/tech/billavista/PDFs/Federal_Mogul_how_to_measure_driveshaft angles.pdf