driveshaft alignment

Mpsoldier

Mpsoldier

That just happened!
Mar 10, 2010
646
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In my House
So I have an 01 dump truck 12' body all stock just a work horse that i picked up for bad injectors... everything runs good now but i have a vibration on take off, not while driving just take off. also when rear drive-shaft is removed vibration goes away. Pinion and output shaft angles are spot on same angle. Drive-shaft was fully rebuild new joints and carrier. Still same problem. Output shaft feels nice and tight and pinion does as well. Funny thing about it is the carrier bearing is offset to the passenger side, doesn't look modified in anyway but have never come across this before. Also don't see why they did that as there is plenty of room to run it straight.. before I go modifying this just wanted to see if anyone else has come across this.
 
Lmm25r

Lmm25r

dirtymax
Feb 14, 2016
8
0
0
Ma
have you brought in to get the driveshaft balanced? i had redone my driveshaft as well and had some vibrations around 50, then at 70-85, then at 95-110... driveshaft looked fine... but turns out it was so out of balance, it couldnt be fixed. had to buy a new shaft from GM. swapped it out and it was like a brand new truck. maybe pull the driveshaft and bring to your local driveline shop to see if its a-okay? however... i would think balancing wouldnt effect it at take off... never know though.
 
Mpsoldier

Mpsoldier

That just happened!
Mar 10, 2010
646
0
16
In my House
bump so no one has seen something like this before... i am thinking i will be straightening out the drive-line then. not sure what happened or how its like this but it doesn't seem right and have never heard or come across this.
 
Lmm25r

Lmm25r

dirtymax
Feb 14, 2016
8
0
0
Ma
I saw a forum somewhere when I was having issues with my driveshaft by just searching In A Google search before I had joined here... Was all about vibrations when taking off... Tons of guys saying to grease the slip yoke and it fixed their issue... I think some guys were having a clunking noise when stopping and going... However I don't see greasing the slip yoke as a good idea... I feel like it would mix in with the Tranny fluid. Wish I remembered where I saw it. There was some other info in there as well...
 
WVRigrat05

WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
Lmm25r said:
I saw a forum somewhere when I was having issues with my driveshaft by just searching In A Google search before I had joined here... Was all about vibrations when taking off... Tons of guys saying to grease the slip yoke and it fixed their issue... I think some guys were having a clunking noise when stopping and going... However I don't see greasing the slip yoke as a good idea... I feel like it would mix in with the Tranny fluid. Wish I remembered where I saw it. There was some other info in there as well...
Click to expand...

They were talking about the one at the carrier. My friends f350 was terrible about it.

I had to grease the one on my LLY all the time at the transfer or it vibrated at speed.
 
Mpsoldier

Mpsoldier

That just happened!
Mar 10, 2010
646
0
16
In my House
i am more interested in if anyone has ever seen a carrier bearing offset in the drive line. i have never seen this and i believe this is part of the problem. i will post a pic tomorrow
 
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