Rear end "whirring" after lowering...

[67special]

I flipped the rear spring perches, put it back together and now it sounds like the rear end is....whirring,..buzzing,...vibrating...(almost like a 10 speed bike when you dont pedal). It does that through all three gears, and when it gets to about 55-60 the vibrations start to rattle somthing. Ive also noticed it does this more when I accelerate.
Now, I know I changed the pinion angle ALOT, and ive ordered shims to correct that.I really hope that is the problem. Anybody else have any ideas?

[BobbyFord]

Incorrect pinion angle IS your problem. You want 4-5* of pinion angle, opposite the trans angle.

[67special]

I sure hope so Bobby.....I figured its the only thing that changed. Oh and the way I flipped it moved everything about a 1/2" back(as well as about 8"up!!)

[Bullitt390]

Whoa! You're pinion angle is nasty!

Josh

[westco]

67special....will that clear the bed?

[67special]

I dont kno yet if it will clear the bed...It'll be close or I might have to trim those perches a little. I got a set of 4* shims today,so tomorrow I'll slip those in. If that fixes my vibration problem, I'll put the bed back. I'll post some pic's when i'm done or if I have to trim those perches. I do not want to butcher the bed, but I will massage it a little if i have to. Wish me luck!

[BobbyFord]

Two and a half inches is about the distance between the bed and the frame in the shackle area.