C4 Front Suspension difference
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Pro
Joined: Dec 2008
Posts: 520
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From: Horseheads NY
C4 Front Suspension difference
I bought a 1957 project that the original frame was converted to C4.
I "believe" there's a difference between certain years.
How do I determine the difference in the two.
My frame where the two studs from the upper A Arm mount are not the same Heighth,the rear hole is lower.The front suspension that is complete and came with car has
The two holes for the upper A Arm are the same height
Any help would be great
Obviously this is for Resto Mod guys
Dave
I "believe" there's a difference between certain years.
How do I determine the difference in the two.
My frame where the two studs from the upper A Arm mount are not the same Heighth,the rear hole is lower.The front suspension that is complete and came with car has
The two holes for the upper A Arm are the same height
Any help would be great
Obviously this is for Resto Mod guys
Dave
Melting Slicks
Joined: May 2001
Posts: 2,749
Likes: 776
From: Dadeville AL
For early thru '87 uppers I believe the "flats" of the shaft are parallel to the ground and '88+ the "flats" are vertical to the ground. By flats I mean the surface between the mounting bores to the bolts.
Safety Car
Joined: Dec 1999
Posts: 4,400
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From: Lexington,NC,USA
C1 of Year Finalist (track prepared) 2019
The '84 C4's had an aluminum plate that was attached to the top of the lower A arm in front. The shocks and sway bar were attached to this plate. The later model's shocks and sway bars were attached directly to the A arm. Not sure when the change over was made.
Here is a picture of a '94 suspension.
Charles
Here is a picture of a '94 suspension.
Charles
Last edited by cbernhardt; Jun 7, 2017 at 08:39 AM. Reason: added picture
Safety Car
Joined: Oct 2016
Posts: 4,617
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From: Olive branch Ms
The a arms point lower in the rear on all C4s. It's called anti dive. As Charles says the early suspension has a plate where the shock attaches to the lower control arm, front. On the rear if the shock mount is straight up and down its later if it's angled it's early. On the rear if the emergency brake is made in the caliper it's later if it's internal and has the shoe type e brake it's early.
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Joined: Dec 2008
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From: Horseheads NY
