Rear toe off

I don’t want to start a TW argument, but think it through. I’m still right. The wheel hub is pressed onto the axle and rotates. That joint, if offset like your show it, would vibrate like crazy as it spun around. I agree with everything else in the drawing.

 

you can move the axle some to adjust ride height in it that affects toe.

 

Toe is “cross eyed” or “lazy eyed”. It describes the wheels pointing towards each other or away from each other when viewed from the front.

That is why this thread is interesting, as there is no easy adjustment for toe on a solid rear axle. It is set at the factory when they cast, machine, and weld the rear axle tube and differential assembly.

It has nothing to do with leaf spring shims, or angle blocks.

Are you sure it is toe that is out?

 

i did a check myself.

 

THATS THE FRONT TIRE! YOU SAID REAR TOE. That’s a tie rod adjustment. If you work at firestone just align it then nothing is wrong.

 

That’s exactly what I was thinking.

 

Your rear to is out almost equal amounts in opposite directions. So it is neither toed in nor toed out. Sounds like how it was bolted to the leafs springs. It’s slightly canted. There is a lot of play in those leaf spring pins. That’s all it likely is.

 

the front is easy the rear is out but is greyed as you normally don't adjust it but you can see the middle number should be 0 for thrust angle

 

Just screw the toe rods in. Done. You’re less than a 1/4 of 1 degree out. That is an easy fix

 

As evidenced by his thrust.

 

going to try and move the rear axle some with it loosened and hope that is all it needs

 

Cool. Are you at the machine now?

 

ya in now trying to adjust it I'll post the results after

 

Gotcha, I was drawn towards the red.

 

ok with a few crappy ratchet straps got the rear thrust angle alittle better. I'm going to buy heavy duty ratchets or a come a long and try it again soon

 

Let it go, man. You are literally trying to get one fourth of one degree out of it. (assuming your machine is set up on a 1/60 scale, and not a 1/100 scale, which would be even less). It's a solid rear axle truck. It's NOT an F1 car, that might need that fine tune to take the 9th corner at Monaco 1/10 of a mph faster. Let it go.

Trying to pull that hard may damage something, or more likely, it will just pop back into the same spot, on the first big bump you hit. Consider what happens when the engine turns the driveshaft, which turns the differential, which turns the wheels. Ever heard of axle tramp? Or driven a FWD with unequal length half-shafts? You get a little torque steer. It's not worth messing with.

 

It holds it wherever it is. Doesn't mean it holds it perfect.

Isn't that within spec.? Everytime I've had a 4W alignment (any car) they tell me the rear is off but they can't fix it right, just shim it.
I always ask "will I notice" and never can.

 

The alignment in this picture shows the rear axle is not bent but it does need the u-bolts loosened and the axle re-centered the right side needs to go forward and the left needs to go back. neither need to move very much just moved on the centering pins . the total rear toe reads .8 of 1 degree a little toe in is good, as the front of tires try to spread as you drive forward . It's possible that the u-bolts are a little loose .

 

So reviving a thread from the dead here, but my rear toe, is indeed actually off apparently. Had some pulling to the right and had the truck aligned and the dude was like your front’s fine, but your rear toe is a little bit odd. Any ideas? I have been rear ended before, but it was over two years ago and the truck drove fine for 55k miles until this week, so i dont think the axle would bend over night?

 

When I raced cars I knew people that would bend and weld a live axle such that it had some negative camber. Sounds like this is just the factory version in a different plane. QC problem actually.