pinion shims

[Ray McIntireJr]

When lowering the ST with the lowering blocks did anyone use pinion shims or are they needed?

 

[EddieS'04]

Not shure what a pinion shim is. I lowerd mine just using the blocks between spring and axle.

 

[Bill Barber]

?????????????????

 

[Michael Cacioppo]

Pinion shims are in the rear carrier and should have nothing to do with lowering.

 

[Dingo]

He's talking about triangular shims between the blocks and axle to correct the pinion angle.



And I'd use 'em if the block manufacturer suggests them.

 

[Bill Barber]

Have lowerd two gen 1 tracs, have never seen any shims

 

[Keola P]

In downtown Honolulu, lots of shims come out at night

 

[EddieS'04]

HST,that there is funny. We have a street downtown houston the same way.:lol:

 

[Gavin Allan]

We call 'em traction bars around here.

 

[Dingo]

Gavin, not the same thing. Picture a really flat metal doorstop.

 

[Dingo]

Kinda like this:



<img src="http://www.4crawler.com/4x4/ForSale/Images/Shim5.jpg">

 

[Ray McIntireJr]

Exactly Dingo. I'veread that they are nedded when lowering trucks or suvs that use leaf spring suspension in the rear. If the pinion angle is not correct it may cause vibration, thumping or rattling noise and premature failure of the u-joints.

 

[EddieS'04]

raym2, how much do you intend to lower it. I say they are not needed. Think about the fact that the truck has the ability to be loaded down. No correction is needed.



The only time I corrected angle was on some of the lowered cars I raced. Then pinion angle was critical to not blowing u-joints, due to axle wrap.

 

[Ray McIntireJr]

I'd like to lower it 2-3 inches all around. I emailed Todd and Dingo, heard back from Todd and he seemed to think it wasn't needed.

 

[Todd Z]

By lowering the ST your straighting ( lessening) the angle on the Cardan joints..... Your actually making it straighter....



I don't think there will be a problem on the ST, there should be no need for them...



Todd Z