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Does anyone have SCANS of EM REAR suspension alignment instruction?
Posted by: MattNall ()
Date: November 14, 2020 06:02PM

As the subject says. I don't have a 1960 Chassis Service manual.

For our FAQ's

Thanks in advance!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
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How to align EM & FC REAR Suspensions
Posted by: Frank DuVal ()
Date: November 14, 2020 06:36PM

Rear Wheel Alignment

Toe In Adjustment

Due to the design of this independently sprung
rear axle and suspension it will be necessary to check
and adjust rear wheel toe-in. Be sure tires are inflated
to correct pressures.
: drive on type equipment is used, reverse the
ve icle and back it into position. See "Lifting Corvair
W h Hoist" in Section One. Toe-in (overall) will be
re: i as toe-out when vehicle is backwards, because
re: iings will be taken from the rear of the tires rather
th. 1 the front. A tram may also be used in a similar
SUSPENSION 3-5
procedure as that used on the front wheels except both
sides will be adjusted at the same time. It must be
pointed out however, that since the wheels are adjusted
by adding or removing shims at the front edge of the
transmission (with rear engine support loose), both
wheels are adjusted at the same time. With the design
of this suspension, it will be impossible to adjust one
wheel at a time as shims must be added or taken away
equally from each side. See Figure 3-35.
A shim added to each side will increase toe-in. Removal
of a shim from each side will decrease toe-in.
Shims must be added or removed in pairs. Toe-in
should be 0" to %" total toe-in.
NOTE: Due to manufaduring tolerances and
parts "stack-up" it is possible to have toeout
on one wheel and toe-in on opposite
wheel. In this instance, adjust the suspension
to bring the wheel with the toe-out as close to
specifications as possible but not letting opposite
wheel go out of specifications. If, ~or example,
one wheel toes-out by V4" then opposite
wheel must toe in enough to give 0" to V4"
overall toe-in.

Camber

The camber on rear wheels should be 11/2 0 + lh o.
There is no provision for adjustment of this item and
it is provided as a checking specification only.
If camber is not within limits, either the crossmember
is out of alignment with the body or has
become distorted due to coilision, etc. (see "Body
Dimensions and Checking Procedures" Section 10),
or else the control arm has become distorted, bent, etc.

Frank DuVal

Fredericksburg, VA



Edited 1 time(s). Last edit at 11/14/2020 07:38PM by MattNall.

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Re: Does anyone have SCANS of EM REAR suspension alignment instruction?
Posted by: Frank DuVal ()
Date: November 14, 2020 06:52PM

OK, here is better version:

Rear Wheel Alignment

Toe-In Adjustment
Due to the design of this independently sprung
rear axle and suspension it will be necessary to check
and adjust rear wheel toe-in. Be sure tires are inflated
to correct pressures.

If drive on type equipment is used, reverse the
vehicle and back it into position. See "Lifting Corvair
with Hoist" in Section One. Toe-in (overall) will be
read as toe-out when vehicle is backwards, because
readings will be taken from the rear of the tires rather
than the front. A tram may also be used in a similar
procedure as that used on the front wheels except both
sides will be adjusted at the same time. It must be
pointed out however, that since the wheels are adjusted
by adding or removing shims at the front edge of the
transmission (with rear engine support loose), both
wheels are adjusted at the same time. With the design
of this suspension, it will be impossible to adjust one
wheel at a time as shims must be added or taken away
equally from each side. See Figure 3-35.
A shim added to each side will increase toe-in. Removal
of a shim from each side will decrease toe-in.
Shims must be added or removed in pairs. Toe-in
should be 0" to 1/4" total toe-in.


NOTE: Due to manufacturing tolerances and
parts "stack-up" it is possible to have toe-out
on one wheel and toe-in on opposite
wheel. In this instance, adjust the suspension
to bring the wheel with the toe-out as close to
specifications as possible but not letting opposite
wheel go out of specifications. If, for example,
one wheel toes-out by 1/4" then opposite
wheel must toe in enough to give 0" to 1/4"
overall toe-in.


Camber
The camber on rear wheels should be 1 1/2 ° ± 1/2°.
There is no provision for adjustment of this item and
it is provided as a checking specification only.
If camber is not within limits, either the crossmember
is out of alignment with the body or has
become distorted due to collision, etc. (see "Body
Dimensions and Checking Procedures" Section 10),
or else the control arm has become distorted, bent, etc.



Hmm, of course I cannot attach a .doc file.angry smiley

Frank DuVal

Fredericksburg, VA

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Re: Does anyone have SCANS of EM REAR suspension alignment instruction?
Posted by: MattNall ()
Date: November 14, 2020 07:24PM

Thanks Frank!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Does anyone have SCANS of EM REAR suspension alignment instruction?
Posted by: junkman ()
Date: November 15, 2020 08:15AM

I was told that it is also necessary to loosen the engine mount, and bounce on the body to get the engine neutralized before taking the readings. Since the engine and transmission are set in rubber, it isn't a perfect world for alignment. Another former Chevrolet mechanic told me that the best method is to just put back the shims that were in it originally whenever possible.

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Re: Does anyone have SCANS of EM REAR suspension alignment instruction?
Posted by: corventure Dave ()
Date: November 20, 2020 02:17PM

If the two transmission mounts are not in good to excellent condition, any attempt to adjust tow is quite impossible. If the trans mounts move around and the engine mount is the only semi=firm mount, the rear wheel toe will constantly change with driving conditions.

Corventure Dave

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Re: Does anyone have SCANS of EM REAR suspension alignment instruction?
Posted by: joelsplace ()
Date: November 20, 2020 09:50PM

I've found that with sloppy mounts you can pre-tension them and they will work ok. It will take a pry bar and different shims but it works ok. Obviously the best solution is new mounts.

Joel
Northlake, TX
5 Ultravans, 113 Corvairs and counting...

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