South Carolina BS thread under new MANAGEMENT and lives in SC

axle shims, skinny part fwd, or fat part fwd? i see both on here all over the place, and both claim their opinion is correct..........so, maybe one side one way, other side other way

 

Morning, folks!

 

meh, yeah, ive got some, more for finding the right answer when the time comes that I want to deal with it. another thread dude has vibes, said he put skinny part fwd.

 

Morning y’all happy freaking Tuesday

 

hahaha, yes, u-bolts tight, check, torque, drive a bit, check, torque again

I think fat port fwd too. its a tough think-through this early for sure

 

The idea is you want to match your driveline angles. When you lift your angles become larger, so putting the skinny side forward would tilt the pinion up, lowering the driveline angle.

 

Agree with concept, but wouldn't we want to tilt the pinion up a bit, I feel fat part fwd would do this

 

Negative fat part forward would tilt it down.

It's never gonna be perfect anyways. On take off there will always be axle wrap unless you install a drag bar whatever it's actually called.

 

#airhands lol

 

This is correct and what I’ve been adjusting for the past few days. Actually removed my 3degree axle shims in favor of just a CB drop. From what I gather, it’s best to match the angle (within 1 degree to allow for needle bearing rotation) of the front and rear half of the driveshaft. The pinion angles of the tcase and rear diff SHOULD be parallel, or close to it. I do mainly hwy miles so any and all vibrations are important for me to eliminate.

Max

 

I am going to get one in the next batch! I really like the way they look

 

Skinny part forward will angle the pinion towards the ground increasing your u-joints angle, fat part forward will decrease the u-joint angle and point the pinion towards the t-case

 

Or you can do what I've done in the past and make a laddal bar and put it on a shackle like the leaf springs so it can move the way a leaf spring set up moves. There are also "slapper" bars and other such devices like caltracs that help with axle wrap.

Many ways to skin the axle wrap problem but none are really perfect.

 

You got that backwards if the skinny part is

Yes match the drive line angles but you have the shim angles backwards.

Fat end towards the back rotates the pinion towards the ground thus decreasing pinion angle and increasing the u-joint angle.

 

Fat end back lowers the back of the diff away from the leafs pointing the pinion up(SUA)

 

Yeah disregard what I was saying I was think SU set up

 

See above ^^^^ was thinking a different set up. Working on designing something right now hahaha so that was on my brain

 

CB drop is snake oil. Toyota set the t-case and CB u-joints to the correct angle. dropping the CB introduces more misalignment into that forward section.