Is this normal for Alcan leaf springs?

Front of the leaf springs are flat/have negative arch. I have some custom alcan springs for 500lb weight capacity over stock. I only have a camper shell and a full size spare on the back. Is this normal?

 

Mine arch upwards too and I’m 100% stock suspension.

 

May need to be rearched

 

Bummer. I paid good money for them and I’ve had them on the truck with much less than the capable weight for less than 3500 miles. The rear of the springs are arched and look fine. Truck rides well and I haven’t had any weird feeling about them. I just looked at them after loading the bed up with some gear out of the garage and realized they had that curve to them. I’m contacting alcan to see what they say.

 

Anybody have any experience with Alcan springs that can chime in?

 

Looks like maybe the pinion rotated up; pinion is in-line with the driveshaft. Hard to tell.

 

In that second pic, should that carrier bearing rubber be oily like that? The angle at the pinion flange is straight an an arrow.

 

So to answer the question, yes it looks like it is in line with the drive shaft. Should it be more flat to the ground (horizontal)?

 

It looks like the top pic in this image that I pulled from a post made by jberry813

 

You're going to have to measure the angles to get an accurate account of how the parts are in relation to one another. It's not something you eyeball.

There's 4 different ways to balance the angles on a 2-piece shaft; the pic you posted is a 1-piece shaft...

Your angles are probably closest to Method 3 in the link.

http://www.4crawler.com/4x4/CheapTricks/Driveline-101.shtml#2-Piece

 

Correct. Should the rear axle be angled up toward the drive shaft though? Looking at it from the side, it’s probably rotated clockwise(toward the rear of the truck). Should it be level with the ground?

 

No; closer to horizontal.
I think it's typically a 2-3 working angle.

How's the fit on the centering pin in the leaf perch?

It's like it's in a constant state of axle wrap.

 

That’s exactly what it looks like now that I’m actually looking at it. Sh*t. I’m not to familiar with this issue. What should I be concerned with here?

 

I'm guessing whoever installed them tightened the u-bolts while the tires were off the ground. You need to loosen them and re-torque them with the weight of the truck on the spring.

 

Well that doesn’t make sense. Seems like it would be hard to torque them down while it’s in the air.

 

I can see how that could cause this though

 

I’ll just loosen them up and see if everything starts shifting

 

I feel dumb asking...
Are they on backwards?

 

Not hard at all. They probably used an impact. I'd take it back to whoever put them on and have them fix it. That's some rookie shit.

 

Military wrap end forward. Looks right to me.