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1985 suspension alignment

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Old Oct 4, 2013 | 09:28 PM
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Default 1985 suspension alignment

Can tire shops do a suspension alignment?
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Old Oct 4, 2013 | 10:56 PM
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Originally Posted by sturmmorser2000
Can tire shops do a suspension alignment?
It depends on the shop, but yes. There's really nothing unique about a Corvette. It will need a 4 wheel alignment.
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Old Oct 5, 2013 | 04:17 AM
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When they align the tires is that aligning the suspension as well?
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Old Oct 5, 2013 | 10:36 AM
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Originally Posted by sturmmorser2000
When they align the tires is that aligning the suspension as well?
An alignment consists of adjustments for caster, camber and toe. On the front, caster and camber are adjusted by installing shims where the upper control arm bolts to the chassis. On the rear, camber is adjusted using the large bolt that attaches the arm to the differential. Toe is adjusted on the front and rear by removing the outer end of the toe rods from the knuckles and screwing the toe rod end in or out to lengthen or shorten.
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Old Oct 5, 2013 | 10:45 AM
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There is No "aligning the suspension". There is ONLY wheel alignment.

A 4 wheel alignment based off thrust angle is required.
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Old Oct 5, 2013 | 08:28 PM
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Originally Posted by leesvet
There is No "aligning the suspension". There is ONLY wheel alignment.

A 4 wheel alignment based off thrust angle is required.
What about adjusting the rear leaf spring?Or is that supposed to be fixed position?
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Old Oct 5, 2013 | 08:43 PM
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Originally Posted by sturmmorser2000
What about adjusting the rear leaf spring?Or is that supposed to be fixed position?
The rear spring is not adjustable. If you remove it, be sure to reinstall the shims on the differential mount the same way they came out.

Rear spring ride height can be lowered by purchasing longer bolts.
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Old Oct 5, 2013 | 08:53 PM
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Originally Posted by leesvet
There is No "aligning the suspension". There is ONLY wheel alignment.

A 4 wheel alignment based off thrust angle is required.
That is "often" debated - while the final desired spec is maybe wheel/tire alignment it's actually the adjustment of "suspension" components that provide the results. There's no "physical" adjustment that can be accomplished with the wheel/tire other than "balance" for normal day to day driving conditions. Worn suspension components and the replacement of such generally require the alignment procedure.

All alignment procedures are a change of the relationship of "suspension" components to one another. The result is wheel/tire placement but it's "suspension" changes that accomplished it!

Originally Posted by sturmmorser2000
What about adjusting the rear leaf spring?Or is that supposed to be fixed position?
The rear spring is adjusted for height control at the center mount to the differential cover. That is generally a "one time" procedure unless there's a desire to either raise or lower the rear, the bolts on the ends can be used to further "tune/trim" the height, that doesn't generally require an alignment!

Last edited by WVZR-1; Oct 5, 2013 at 08:58 PM.
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Old Oct 5, 2013 | 09:12 PM
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Granted its suspension that wears and causes the need for an "alignment", BUT, its a Wheel alignment that takes place....

this is done by adjustment of supporting structures that are PART of the suspension, BUT, the actual suspension has a design purpose of shock absorbing, leveling the chassis, maintaining tire contact with a varying road surface....up/down motions, NOT angular or lateral. That is steering or wheel position, hence the term 4-wheel alignment.

In almost 60 yrs I have never heard anyone refer to it as a "suspension alignment" because that's simply incorrect for the actions that take place in the alignment process. what's actually being "aligned" ? ?
Its wheels that get aligned.

Rear spring can be somewhat adjusted. That's NOT aligning anything. You can also adjust valve springs...and again, never heard of anyone "aligning their rockers and valves"....they always adjust them.

lets do this....call every shop in town and inquire about a suspension alignment. Count the responses...
1 huh?
2 what?
3 say again?
4suspension alignment?
5 you mean a wheel alignment, don't you?
6. lemme get the manager for you

the BIG money bet is on #1 by 10:1

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Old Oct 5, 2013 | 10:08 PM
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Originally Posted by leesvet
lets do this....call every shop in town and inquire about a suspension alignment. Count the responses...
1 huh?
2 what?
3 say again?
4suspension alignment?
5 you mean a wheel alignment, don't you?
6. lemme get the manager for you

the BIG money bet is on #1 by 10:1

Your way to "entertaining"!

And the response to (1) huh? - I know I've called the wrong shop or maybe the shop has "your cousin" on the phone! They need someone a bit more "professional" on the phone if in fact they do quality work. (2) & (3) you've got another cousin in town doing something he shouldn't be doing and finally if that's the response you got from any of the calls you just move on and find a maybe reputable shop. Obviously "the cousins" don't "geet it"!

(4) then I explain & he responds - judge from the response

(5) an opportunity for a conversation could be productive

(6) your "cousins" could learn from the experience - it could be their "first response when answering the call"

OP - your question wasn't foolish and with your present predicament I'd say it was a reasonable question. You're learning - that's good! There's no foolish question - maybe foolish responses to an intelligent question.

Hang in there!
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Old Oct 6, 2013 | 01:20 AM
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Thanks after I get it back from the shop i'm taking to the tire center and let them align it
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Old Oct 6, 2013 | 10:42 AM
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Originally Posted by sturmmorser2000
Can tire shops do a suspension alignment?
yes

to throw a little gas on the fire; i remember back in the day when all were call front end alinements.

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Old Oct 6, 2013 | 11:18 AM
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Originally Posted by garryowen
yes

to throw a little gas on the fire; i remember back in the day when all were call front end alinements.

I remember that too. But back then, the rear ends were fixed in place either by leaf springs or coils and 4-link bars and sometimes a panhard bar. No adjustments at all in the rear unless rubber bushings were shot and needed to be replaced (which isn't really a rear alignment)

But there are shops today that will tell customers they are doing a "4-wheel alignment" and all the shop does is to adjust front toe and maybe camber. That's called a "toe and go" and is a rip-off.
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Old Oct 6, 2013 | 11:39 AM
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Decent alignment shops will provide the before and after numbers. So you'll know it's within spec at all 4 corners.

What is odd about the 85 is the specs provided in the FSM that the alignment shops use. They actually specify positive camber at the rear. When I had mine aligned following a complete suspension overhaul I provided the shop with the specs I wanted them to use.
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Old Oct 6, 2013 | 12:14 PM
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Originally Posted by c4cruiser
I remember that too. But back then, the rear ends were fixed in place either by leaf springs or coils and 4-link bars and sometimes a panhard bar. No adjustments at all in the rear unless rubber bushings were shot and needed to be replaced (which isn't really a rear alignment)

But there are shops today that will tell customers they are doing a "4-wheel alignment" and all the shop does is to adjust front toe and maybe camber. That's called a "toe and go" and is a rip-off.
A "thrust angle" alignment regardless of the rear axle design uses the rear axle for proper comparisons and checks. A solid rear axle of any type can be adjusted/modified but NOT by simple wrenching. Corrections are done with frame equipment etc. Removing and replacing rear suspension arms with "adjustable" is often done. Primarily let's say on "lifted" trucks and SUV.

Why the "implied" rip-offs? Perhaps you've been a "victim"? Are there "rip-offs"? For nearly every service that is offered for nearly any product that you can think of YES there are "rip-offs" BUT there's also quality service that is explained to the consumer if: 1 - they'll listen 2 - maybe read what's presented

To many in "way to big a hurry"!

Last edited by WVZR-1; Oct 6, 2013 at 12:18 PM.
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