My Caster readings...4" lift

[desertdude]

Posting this to see if we have a similar issue that can be discovered - On the subject of the steering pulling - after my 4" Slee lift I experienced pulling to the right - with new tires balanced - road force balanced again- tire swapping - all new trunion bearings - wheel bearings - bearing play re-checked - I still am experiencing the wheel pulling to the right ( Passenger side)


center hub to flare measurements Front 23.5" rear 23" - Below are my alignment figures:

 

[e9999]

Posting this to see if we have a similar issue that can be discovered - On the subject of the steering pulling - after my 4" Slee lift I experienced pulling to the right - with new tires balanced - road force balanced again- tire swapping - all new trunion bearings - wheel bearings - bearing play re-checked - I still am experiencing the wheel pulling to the right ( Passenger side)


center hub to flare measurements Front 23.5" rear 23" - Below are my alignment figures:

no wonder it's pulling, you got one of the ultrarare IFS 80s...

 

[FJBen]

Posting this to see if we have a similar issue that can be discovered - On the subject of the steering pulling - after my 4" Slee lift I experienced pulling to the right - with new tires balanced - road force balanced again- tire swapping - all new trunion bearings - wheel bearings - bearing play re-checked - I still am experiencing the wheel pulling to the right ( Passenger side)


center hub to flare measurements Front 23.5" rear 23" - Below are my alignment figures:

Was the steering wheel off-center after you put the arms on?

 

[sleeoffroad]

Desertdude, check your rear axle lower control arms. You might have a bent rear arm. Your DS tire is toe'd in and PS is toe'd out. This means you axle is sitting at an angle under your truck and pointing to the right.

 

[sleeoffroad]

Ben your steering wheel location is off because the axle was pushed forward and your draglink effectively became a little to short. Adjust draglink to center the steering wheel.

 

[desertdude]

Was the steering wheel off-center after you put the arms on?

Yes - As Christo advised - just adjust your drag link - takes a few minutes

 

[desertdude]

Desertdude, check your rear axle lower control arms. You might have a bent rear arm. Your DS tire is toe'd in and PS is toe'd out. This means you axle is sitting at an angle under your truck and pointing to the right.

This alignment came right after the install (no wheeling) back in March - I will take a look and post back

 

[Nay]

Desertdude, check your rear axle lower control arms. You might have a bent rear arm. Your DS tire is toe'd in and PS is toe'd out. This means you axle is sitting at an angle under your truck and pointing to the right.

That is the exact same thing that jumped out at me. The rear axle is off the perpendicular plane.

Nay

 

[XXXR]

So you guys got me wondering about a few things. I started a thread a while back regarding steering adjustment after my OME 2.5 lift including the caster correction bushings. Well, I'm certain now that its caster.

Ran the measurements and found the front end at camber -.1 on the left and +.2 on right. Caster is 1.2 on right .6 on the left.

I was wondering why the truck felt a little twichy after the lift. So I gotta pull the bushings out again?

I think adding the extra 1.25 spacers AFTER installing the bushings may have thrown everything off.

Suggestions?

 

[desertdude]

Desertdude, check your rear axle lower control arms. You might have a bent rear arm. Your DS tire is toe'd in and PS is toe'd out. This means you axle is sitting at an angle under your truck and pointing to the right.

Hopefully this hijack will light up something for Ben a well

Checked the rear lower control arms with a straight edge - they are perfectly straight - measured the distance RLCA center bolt to center bolt - same measurement ( both sides) - checked measurement from the center bolt to approx. same spot on the rear axle housing - got the same measurement (both sides)

For the alignment challenged -where /what to check next to correct this?

 

[landtank]

DesertDude, have you adjusted the panhards yet?

 

[desertdude]

DesertDude, have you adjusted the panhards yet?

Yes I did - they are or were within an 1/8th" I can recheck to be sure they have not moved

 

[landtank]

I only ask because, back in the day when I was on a rack we would align the vehicle to the rack by gauging one front and one rear tire to a beam of light. If the panhards were not adjusted and a similar setup was used to straighten a vehicle to the machine then it would be on crooked.

Maybe someone knows how that is done on todays machines.

 

[Tools R Us]

Are your rear upper arms adjusted to the same length?

 

[desertdude]

Are your rear upper arms adjusted to the same length?

Yes -

 

[Jason Andrews]

I would check the rear uppers again also. It will cause a pull if they are off just the smallest bit and your caster is not high enough.

 

[Walking Eagle]

I did not add the arms dimensions, however that drawing is to scale. I know the numbers are right.

I wasn' saying it wasn't to scale or the number weren't right, I'm just limited to what I can calculate w/o the #'s. I wouldn't expect you to post up the dims - makes it easier for anyone to do their own.

 

[landtank]

I didn't use any fancy autocad software, just a simple trig equayion for figuring the angle of a right triangle and cam to the same conclusion.

(INV)SIN of (lift in inches)/33

33" is what I got for a distance from the center of the rear bushing to the center of the axle. There is some fudge factoring in there but it was close enough for me.