Pinion angle.
 

I'm going to take another inch or so on the backend of my truck making the rake of 30inches in front to 31 inches in back. Presently it sits at 30/32.

My concern is of pinion/shaft angle. I was going to just grinf odd the mouonts for the leaf springs and put them 1 inch higher up on the frame rails ( both front and back )..

Any of you lowered peeps have any input to offer?
D.

I don't think you'd have any trouble with the pinion angle. It would effectively be the same as taking the stock lift blocks out, wouldn't it?

Unless you change the angle of the leaf, which it doesn't sound like you are, the pinion angle doesn't change. As long as the driveshaft isn't too long (an unlikely scenario), you should have no problems.

Perhaps he's asking about the angle between the driveshaft and the pinion? I could see that changing the way he is doing things. I think with only 1" of difference though, the change in the driveline angle would be pretty negligible.

you could adjust it by moving the front less than the back. his pinion angle is going to change. what does it look like now?

He says he's taking the same amount off both the front and the back. The angle change WILL be negligible -- it's be zero! :wink:

Or, to put it a better way -- although the angle changes, the DIFFERENCE in angle between the transmission (or transfercase) and the pinion will be zero. they will not change in relation to each other, and therefore there is no cause for any alarm at all.

All I can say is there was a change. I spray painted the frame rails, ground off the old rivits. I welded a 1.5inch 90degree piece of angle ontop of the frame rails. It fit below the bed perfectly.

I moved the leaf carriers/holders up exactly 1 inch..

I have vibration now after 45mph and the truck is having shims done and the driveshaft balance checked. It wasn't ' severe ' , didn't make any thumps, but it changed almost 3 degrees.

*IF* I had stock size wheels/tires, I might have been able to get away with this, but with my smaller tires, present leafs and now relocating.. one thing added to another and press-tola, vibration.

Tomorrow I'm moving the shock locations up some so I don't start overcompressing shocks as well.

I'm starting to get good with this mig welder since helping with Joe's springs. Its amazing what you can learn when someone shows you the basics and having prior knowledge of what fouls ;) .

Anyone still sell rattle-cans of sonic blue paint?
D.

Ya D, Wayne (graniteguy) sells them on his website.

http://underdog-performance.com/id81.html

Very odd that it changed. You must not have cut the two ends back the same.

Prob not enough of a change to make a difference, I had a 7 inch drop in the back and didnt need shims even if you get vibrations you can buy some shims to get rid of it.

Found out it wasn't just shimming. One of the parts of my Eaton Diff was hurting and I had a chipped tooth on my gear-ring as well. For the beating its taken, I'm not going to complain.

It rides MUCH nicer now then it did before ( I think new shocks helped some ) . I need 2degree shims and changed to a set of those beefy U-bolts as the axle was off anyway.

My whole axle needed a rebuild from drifting and just beating the piss out of it to begin with. I should rebuild it every 2 sets of tires, I've gone through 8 tires ( 4 sets ) since building it. ;)

you can get a set of 2 degree shims from styling concepts if you do not know where to get them, though I bet you do since you seem to know alot lol.

Mark..

Theres a local shop that makes leaf springs, hangers, coils.. Luke, Joe and i were there the other weekend getting U-bolts. They had shims there, 2$ each. :)

Thats so cheap good thing I never had to buy shims lol. Im not sure howmuch they are on styling but Im betting they arent cheap for what they are.

I have a 2/6 no pinion probs. Every truck is different as you know lol. I am agreeing with you here mark.

*IF* you lowered the back and the front the same, then the vibration should be minimal UNLESS it had prior wear and tear as you mentioned.

sounds like you got everything, right now im still waiting on $$$ to roll in so I can bag that shhhhhhh