Just ordered some 3* shims w/bolts from summit racing. $28 shipped.

 

i just got your text. ******* htc hero bullshit phone

 

lol. no worries. I'll cancel my order with summit!

 

Rear pinion and trans tailshaft should be equal and opposite ideally. I think if you put the pinion anywhere from -1 to +1 it should be good (not including 0 degress so you have some angle on the u joint)

 

Drive Shaft Harmonics

Very good detail imho

 

Update. Got some shims from Bryan(Area47), installed the 4* and it reduced almost all of the the vibration. I think the rest are from just being lowered, a shortbed and missouri hwys. Thanks again for the input fellas.

Here's how it sits currently.

 

Did you check the degree the dshaft? What mph is the vibration at?

Mine is 45 then again at 55-70 then 120+ i think my dshaft is f***ed but the driveshaft shop says im crazy. Im going with a driveshaft specialties dshaft next year with my new upgrades

 

With the rear shimmed properly everything is in line. The vibration is more of a whole truck wobble. Vibration probably isn't the corrrect terminology. Like driving over really small speed bumps lined up. And it's very slight now.I had the same thing with my SSS. It was dropped too.

 

My drop was 4/7 and i couldn't fix the vibration issue ..but i know for a fact it was the driveshaft ..im going to put a 2 piece from the shop in san antonio texas ..and go back to the 4/7 cause right now I'm at at 3/6 with no vibrations at all..

 

put a good driveshaft in there, and have them set the pinon angle.


when i get enough time for my truck to be down im going to bring mine to someone to have the leaf perch cut off and redegreed to get rid of the flip kit and the shims