where are you guys buying the shims? just installed a 1.5" drop shackle and am having a nasty vibration that fades in and out at high speeds

 

I got mine as a local spring and suspension shop. But tomorrow i am going to swap wheels and tires so see if mine goes away.

Dustin

 

let me know how it goes bro,unfortunetly i have to wait till prolly thrsday.

 

I only have 2 spare's and some 16's haha so i am going to try and find 4 random wheels that are straight and get a used set of good tires. So basically i walk to the back of the shop at work and see what i can find.

Dustin

 

Here's an update on my end guys...

Got to looking at things and I was not happy with the amount of play that was in the pinion yolk when I put it on . So I was looking at my impact wrench and noticed that it was not up to par. It was only rated for 275fptrq .
So I went out and bought a good sears one that was rated for 700fptrq.
I dropped the drive shaft , chalked the wheels and set the brakes. I put a pry bar on the yolk so that it would be stable. Tapped the yolk with a mallet a few times and then hit it with the impact wrench. The nut made a full turn and then I tapped it again and it made another turn. The play was gone from the yolk and it felt good and snug. I put the drive shaft back on and when for a drive and was happy to see it go past 85mph without and vibes. Took it to 95mph and then I noticed a very soft hum almost like it was when I had the stock 3.42 gears in from the factory and I took the speed limiter off.
So I checked everything out and went for another run ,this time I pushed it pass 95 mph and the vibe was just to about 100mph then it was gone and all was smooth up to 120mph when I got out of it "before I ran out of track ".
So I am thinking I will still get the shaft speed balanced to see if it will get the small amount of vibes left.

So I would tell all of you to check your pinion nuts to make sure that they are good and tight. It helped out big time

 

Hope you didn't put to much load on the pinion bearings...i would have done it a little different. Glad to hear something went well.


Dustin

 

Nope all you need to do is check the drag on the pinion with a torque wrench. You should be able to turn it at 25 flbs of trq.
What would you have done different?

 

Is that with out axles and tires? There is a spec just for pinion, and with pinion and rind and carrier.

Dustin

 

I may have some better news.Had tires balanced again and noticed the hubrings forced them selves to not sit flush on the back of the rim and throwing the lugs to flex it so it wasnt seating properly.So we trimmed them to fit perfectly inside and flush,also added 4* pinion shims and it seems to be much better,but tomm i have an appt to get tires roadforce balanced.But i also didnt get to see bed shaking as it was dark out.tomm is another day.

 

Went for a drive this weekend and noticed the right rear was bouncing while the driver side was vibrating so i jacked it up put it on stands and put it in drive took the wheels off and it seems the center hub looks like it moves up and down like it may be bent.Any way i can check to see if it is.