# Drive shaft vibration? **URL:** \ **Category:** Shift518 Automotive\ **Created:** [April 20, 2009, 5:12pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647 "2009-04-20T17:12:38Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 5:12pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/1 "2009-04-20T17:12:38Z")
So when i lowered(5/8) my truck it had a small vibration in the rear wheels,basically the pinion angle is off,Plus the bed shaking from start to 65 is a dead giveaway.I crawled underneath of it and took a measure ment of the driveshaft and came up with 2\*.Then i unbolted the shaft and took a measurement of the yolk and came up with -3\*.This is where im stuck.What is degree pinion shim would i need.I also jacked up the rear end and had wifey put it in drive running and the damn rear end wobbled so bad.Any clue? ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 5:46pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/2 "2009-04-20T17:46:14Z")
are the u bolts tight ? is it a 1 piece or a 2 piece shaft ? ---
**Author:** ![RTrac1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rtrac1/32/6312_2.png) [@RTrac1](https://forums.speedlife.net/u/RTrac1)\ **Post date:** [April 20, 2009, 5:46pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/3 "2009-04-20T17:46:37Z")
what kind of truck, is it just plain ol ujoints or is there a double cardan in there on one end? if its plain ol ujoints on both ends, the flange on the differential should be the same angle as the one on the transmission or transfercase ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 5:48pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/4 "2009-04-20T17:48:46Z")
> [@FS Brand new car trailer and utility trailer](https://forums.speedlife.net/t/fs-brand-new-car-trailer-and-utility-trailer/17235/3): > > what kind of truck, is it just plain ol ujoints or is there a double cardan in there on one end? > > if its plain ol ujoints on both ends, the flange on the differential should be the same angle as the one on the transmission or transfercase ummmm no .there is always a diff thrust angle on them ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 5:52pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/5 "2009-04-20T17:52:40Z")
> are the u bolts tight ? is it a 1 piece or a 2 piece shaft ? 1 piece drive shaft. > what kind of truck, is it just plain ol ujoints or is there a double cardan in there on one end? > > if its plain ol ujoints on both ends, the flange on the differential should be the same angle as the one on the transmission or transfercase 07 silverado 2wd,rear flip kit came with 1"lowered shackles too.I thought the saddles that the axle sits in have offset pegs to align DS but i guess not.The u joint are in great shape too.pic is when its parked ---
**Author:** ![RTrac1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/rtrac1/32/6312_2.png) [@RTrac1](https://forums.speedlife.net/u/RTrac1)\ **Post date:** [April 20, 2009, 5:56pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/6 "2009-04-20T17:56:02Z")
[http://www.4xshaft.com/driveline101.html](http://www.4xshaft.com/driveline101.html) should apply to lowered trucks too ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 6:01pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/7 "2009-04-20T18:01:50Z")
it looks by the pic ya posted the yoke is at a upward angle id dive the nose down a bit in most cases -2 deg is what ya want ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 6:08pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/8 "2009-04-20T18:08:01Z")
Was gonna say before it got posted to check tire balance but this happened with my old wheels/tires too so they are out. 88 so with the driveshaft bein 2\* and addin a 2\* shim which is at -3 i measured would make the yolk at -1 or even zero under load. ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 6:09pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/9 "2009-04-20T18:09:06Z")
should put ya close to that ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 6:09pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/10 "2009-04-20T18:09:27Z")
you have a magnetic angle finder? ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 6:09pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/11 "2009-04-20T18:09:44Z")
Also being that small of a degree really can cause so much vibration.damn ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 6:10pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/12 "2009-04-20T18:10:36Z")
> you have a magnetic angle finder? > > * * * Yes thats what i used for my measurments. ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 6:11pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/13 "2009-04-20T18:11:15Z")
> [@so i quit smoking.....](https://forums.speedlife.net/t/so-i-quit-smoking/17266/8): > > Also being that small of a degree really can cause so much vibration.damn it dont take much to bind up ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 6:14pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/14 "2009-04-20T18:14:41Z")
driveshaft(phone pics in rain) ![http://file048a.bebo.com/15/large/2009/04/21/01/8662774463a10653439818l.jpg](http://file048a.bebo.com/15/large/2009/04/21/01/8662774463a10653439818l.jpg) yolk ![http://file048a.bebo.com/15/large/2009/04/21/01/8662774463a10653439872l.jpg](http://file048a.bebo.com/15/large/2009/04/21/01/8662774463a10653439872l.jpg) ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [April 20, 2009, 6:15pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/15 "2009-04-20T18:15:13Z")
This reminds me I got to check mine…I get a little vibration around 70mph ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 6:18pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/16 "2009-04-20T18:18:07Z")
ya wanna measure the tail of the tranny and the yoke of the diff for ref not th shaft ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 6:24pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/17 "2009-04-20T18:24:16Z")
So i got to crawl under there tommorow and drop the ds and measure the tranny tail.Should i keep the truck level again or is it gonna mees up if i go higher in the rear or side to climb under it? ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [April 20, 2009, 6:25pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/18 "2009-04-20T18:25:29Z")
always measure at ride height and load ,never trq or measure susp components unloaded ---
**Author:** ![MikeyB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mikeyb/32/6448_2.png) [@MikeyB](https://forums.speedlife.net/u/MikeyB)\ **Post date:** [April 20, 2009, 6:31pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/19 "2009-04-20T18:31:03Z")
just so im not completly dumb,i donot need to check the front while it is running do i.That may be a problem.LOL ---
**Author:** ![underboosted](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/underboosted/32/6424_2.png) [@underboosted](https://forums.speedlife.net/u/underboosted)\ **Post date:** [April 20, 2009, 6:31pm UTC](https://forums.speedlife.net/t/drive-shaft-vibration/243647/20 "2009-04-20T18:31:52Z")
mine in my 94 silvarado was off a tiny bit.It killed U-joints every 6 months. [Next page](https://forums.speedlife.net/t/drive-shaft-vibration/243647.md?page=2)