What is a good pinon angle? My truck's pinion angle is to high and shutters off the line....

Thanks Dave

 

Your pinion angle depends on what you use for traction control...If you use some good ladder or lift bars your pinion will be less...Like 2-3 deg neg....With out any it might be 6-7 deg neg...So that when your under power your pinion angle will be close to 0...Most companys that sell them will tell you the angle to run ...

 

I just have a 4" lift and a huge block with stock springs. I can move the pinion angle with my hands a lot just by rolling the tire so I am not happy with my current leaf springs.. Can we run a f250 spring setup on the 150's? Are they the same length?

 

Pinion angle needs to be equal and opposite of tranny output shaft angle. When you added the lift blocks, you didn't change pinion angle, but you gave the axle 4 more inches of leverage on wrapping the springs which is why its going out of spec.

I suggest either a proper lift, or putting some form of torsion limiting bars on it to prevent axle wrapping.

 

The trailmaster lift I have is a pile of junk so what can I do to correct the leaf springs in the back to make them like a proper lift would be?

 

you can get "slapper" bars that attach to the bottom of the axle and the front of the spring. When you accelerate, the torque will try to push the axle up, but the bars will hit the spring and prevent wrapping.

You could also replace the rear shackles with longer ones to lift 2", then use 2" blocks. That's a more sturdy setup. The shackles will affect pinion angle a little, but it hasn't been shown to negatively affect the whole setup. There are also kits that have springs with a different arch. They ride a bit rougher, but it keeps things correct and since the axle bolts directly to the springs they won't wrap much.

 

Ya my springs are warn out and I would like to get some slightly stiffer springs and more arc. Do the f250 springs fit?