Hello everyone, sorry if this is in here somewhere, have looked and found allot of valuable info but just not exactly what I need. I installed 2 inch lowering shackles on my 2010 F150 SCAB. I forgot to check the stock pinion angle beforehand. Well after doing this I now have a very slight vibration at approxamately 18 MPH. On a scale of 1-10 probably about a 2,but it IS there. My pinion angle is now 1.5 degrees negative. I know it hasnt changed drastically but I know it did some and am thinking this is my problem. Sooooo my question is what is the stock pinion angle, so I can know which shims to get to correct this?

Thank you,
Dirtjunkie

 

-1,5deg is it the pumpkin angle or the pinion one?
pinion angle is the angle between the pumpkin and the drive shaft.

there was a shim on my 07Fx2 from OEM. (2" shackle from the factory)
Pretty sure you can have it from ford directly.
didn't mesure mined sorry.

If I remeber correctly the pinion angle should be around ~5deg to avoid any vibration.
that's what I put when I dropped mine and it's good since(except a slight one when going off a stop while towing my toyhauler but that's a bit of axle wrap.