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Old 02-09-2011, 04:27 AM
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1940 chevy suspension blues

I have obtained a 1940 chevy coupe 350/350 with a power disc brake kit on it as well as a ford taurus power steering rack. The shocks are unfortunately the original albeit rebuilt "knee action" shocks. The car dips and skips in a moderate turn, especially when a small bump is hit. Is there a simpler fix for this or do I scrap the work that has been done and get a mustang II? Any help or advice will be greatly appreciated.

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Old 02-09-2011, 09:23 AM
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The straight axle will never give you as nice a ride as an IFS will but swapping to a pair of conventional shocks shouldn't be that difficult. You'll need to weld mounts on the frame and design some type of mount for the axle or spring perch. All in all it shouldn't be that hard to do, and a lot less expensive than swapping in a Mustang II IFS. Considering the work that's already been done.... you already have disks and rack and pinion steering so if it was mine, I'd just figure out a way to mount a new set of conventional shocks and call it good.

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Old 02-09-2011, 10:08 AM
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thanks Centerline...would you remove the original shocks as well?
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Old 02-09-2011, 10:45 AM
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if you have a straight axle and rack & pinion steering; that is your problem.
the steering geometry is messed up as your suspension changes,
with a frame mounted rack your toe-in changes as your suspension goes up and down.
you will also have major bump steer
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Old 02-09-2011, 10:57 AM
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Quote:
Originally Posted by ogre
if you have a straight axle and rack & pinion steering; that is your problem.
the steering geometry is messed up as your suspension changes,
with a frame mounted rack your toe-in changes as your suspension goes up and down.
you will also have major bump steer
Not necessarily. It depends on how its set up. Here's a link to a pic of Deuce's Unisteer setup on his 3 window. It all depends on how its mounted.

Deuce's Journal Pic

That said, if its not mounted correctly then it definitely could cause a bunch of problems. An easier solution if this is the case would be to use a Saginaw power steering box or possibly one of the smaller Nova boxes and use a cross steer setup which would solve most of those issues.

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Old 02-10-2011, 09:45 AM
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centerline
wow. i had to look at deuce's setup for a while,
deuce has a rack& pinion and a tie rod on his front end.
the geometry just isn't possible, serious binding would occur.
then i went to the unisteer website.
it took me a while to figure out that the left side of the rack was a boot only, no shaft.
unisteer calls it cross steer.

mdstecyk
i suspect mdstecyk has no tie rod and is using both sides of the rack in place of a tie rod.
that would creat lots of problems.
post some pics of your set up mdstecyk
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