OK so my sas is making some wired violent shaking from the right side if

1. I hit any bump between 5 and 20 mph or

2. go between 30-45 mph then it gos away

I took it back to the alignment shop and they looked it over , drove it and reset the alignment and they can't find anything wrong with it.

I checked all the lug nuts , tie rod ends just replaced less then a year ago and no play in them , bearing feels good no play when rocking the tire , rotated the tires just to make sure there is not any bent rims checked the tire balance.

Any ideas please help the violent rocking is getting annoying

 

I don't know from personal experience, but it seems that I remember a few threads were the same thing was happening and they ended up tightening their shackles.

Putting all TG stuff on my rig right now. Called to ask about the torque spec for shackles and they did not really give me an answer. So I tightened them down just until I could see the bushing starting to squish.

Your bushings could also be going bad. Seems to be another common thing.

Later

 

Re check the nuts on your u-bolts. They can loosen up occasionally and give you the death wobble.

 

Yep. Sounds exactly like your shackle and hanger bolts are loose.

Tighten everything up.

:wabbit2:

 

x3 on checking all bolts... sounds like death wobble to me.

 

OK thanks for all the help fellas I will do that this weekend and see where I end up again Thanks All

 

not sure what shackle kit you used for your SAS but after using a T-G kit on my truck found several reports that trail gear bushings don't have the best expected life span...I ordered a couple of extra sets just to have on hand.

 

Its a tg kit guess I will go check out the bushings thanks for the tip

 

check your knuckle caps too, the nuts can back off a little and cause a little play. i just hunted this down on my rig, had just a smidge of play and it would build off itself and shake violently unless i kept the hammer down or hit the brakes. 1. tighten shackles pretty snug, 2. check torque on caps top and bottom of trunion bearings, 3. if it still wobbles check the rotational preload of your wheel bearings. just a little play here and a little there can build off itself and shake pretty hard and make driving unsafe. oh and before i got my tires the front would shake and after a new set that were actually balanced its as smooth as a babies ass

 

A little update and a BIG THANK YOU to everyone I did tighten the hangers up 98% of the shake gone but I did see that the bushings are gone and need to be replaced so here's my next question.

Anybody know what size the 2nd gen sas kit bushings are and if there is a company that sells poly bushing to replace the TG ones?

 

send me a PM or email reminder and I will take a measure ment of my spare set when I get home..
Converting to Poly would be a good idea.

 

There are 3 different bushing sizes you will need to replace them all.

:wabbit2:

 

Will do thanks

Do you know them all and where or if there is anyone that makes the poly set for this set up?

 

just a little fyi from personal experience, i did a trail-gear sas in 08 got nasty death wobble couldnt figure it out. replaced shackle bushings. shackles were extremly loose. replace the upper and lower shackle bolts with a grade 8 bolt, the threads on the cheap china bolts actually strip and myne needed tightening about every 200 miles because the threads were actually stripping, crank the piss outta your 32mm pitman arm bolt, death wobble would make myne come loose. 3 years later ive replaced a tie-rod end (stripped out) replaced front springs with sky manufacturing springs (hd 5 inch tg springs were way soft for my stock 3.0 with no winch even mounted kept bottoming out bad), tg shackles, replaced bushings and all bolts with a boomerang set up from sky, (from bottoming out hard with tg's springs would run my shackle into my body mount. theres not much trail gear stuff left under the front end of my truck i hate to say it