rear alignment

[gary j zingle]

".........problem may be the rear bogies. Since I replaced
the bushings I have not had it aligned. I may have 4 wheels
all pointing in different directions. It could also be ride height.
I also replaced the ride height arms. She does run flat. The
side bumper trim is the same height front and rear."


Arch the ride height is critical. I think GM set the rear low
because they could not get enough caster in the front.
If the side bumper trim is the same height front and rear
then I think you will find that the ride height needs adjustment.

When I got the ride height adjusted the trim was lower
at the back.

Also, in my experience, the rear wheel alignment could
have some impact, especially when rut running. After
replacing all the front end parts and replacing my rear
bushings I had my local alignment shop set the front
end and give me readings for the back.

Since I am cheap and comfortable with getting underneith
I didn't have them do the shimming at the back. It took 3 rounds
of shimming and measuring at the back before I got it
where I wanted it.

Now that I have gotten it within spec it seems to drive
much better in the ruts.

Regards

Gary Zingle
1973 GMC 26 foot

 

[gary j zingle]

" If one wheel is toed out, and the other toed in, you're going around =
a =

corner. You need to position the wheels in the straight ahead position =

before aligning. In your example, the toe-in (or out) is in fact 0.
If the rear axle (axles in our case) are complementarily misaligned, (=
so

you seem to go straight down the road), then you will crab down the road
with =

little or no scrub, but somewhat poor handling, and you will take up more=
=

road than you should, width-wise."


Sorry Rick if I wasn't clear. I was speaking only of the rear. The
scrubbing
I refered to was related to the 2 pairs of wheels back there.

If both pairs had 0 toe and the pairs were not pointed in exactly the sam=
e
direction I believe scrubbing would result.

HTH

Regards

Gary Zingle
1973 GMC 26 foot