I have an 04 and have jlp drop shackles and trac bars. I flipped the shim for my 04, still had a vibration, then I removed the shim.
My question is if my pinion angle was off before I installed the trac bars, would it still be off if I removed the shim? If I remove the trac bars would anything happen to the pinion angle? Also, can someone post a pic of how a 2 degree negative pinion angle should look.
Thanks,
Simon

 

https://www.f150online.com/galleries...w.cfm?num=7594
A few pics I took, will try to get some better ones tomorrow.

 

ttt

 

looks ok from the pics man

 

I am gonna get out there today and measure the angle.

 

Tranny (yolk) = 4 degrees

Driveshaft angle = 2 degrees

rear end (yolk) = 4 degrees




and i was told to subtract all the angles

4 - 2 - 4 = -2 (negative 2 degrees)

i hope thats right

 

the only thing that concerns me is that the rear end (nose) isnt angled down, i dunno if that matters or not

 

Thats my main concern. I will try and get under there today and will post later on.

 

anyone else comment on this?

 

Took some measurements.
Tranny yolk=4 degrees
Driveshaft angle=4 degrees
Pinion yolk= +2 degrees
What do I need to do?
If I do your calculations then I get a +2 pinion angle. So do I need a 4 degree shim?

 

i really wish someone would chime in on this, i think you should be ok with what you have. And not adding any shims.

I mean if you have no vibrations, and since you have tractions bars i wouldnt worry about anything, from you pics every thing looks ok to the naked eye

 

My only problem is the pinion is pointed up a little.
Any one else have any ideas?

 

mine points up a slight bit to, i wouldnt really worry about it, bu t then again thats me.

Hope someone can fill us in

 

Anyone else got any advice for me?

 

ttt