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rear suspension upgrades
#1
I'm getting ready to redo the rear suspension are there any simple and relatively inexpensive upgrades I can do while I'm in there? I want to get a little better handling but still keep it streetable.

I was thinking of these:
175lb/in 4.5 leaf springs (maybe 195lb/in 5 leaf springs)
polyurethane bushings
KYB Gas-a-Just shocks

Thanks for looking

Jayson
[Image: 36319488731_8f2a376549_z.jpg]
73 Mach 1 Mustang
89 Dodge Shadow ES
94 Jeep Wrangler

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#2
I'd skip the poly bushings.If you do not want rubber try the global west pieces. The P.O. put poly spring bushings in my car ant it creaks and groans like crazy pulling in and out of driveways. I cannot keep enough lube in there to stop it. I do not have experience with the other parts.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
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#3
droptop73;27599 Wrote:I'd skip the poly bushings.If you do not want rubber try the global west pieces. The P.O. put poly spring bushings in my car ant it creaks and groans like crazy pulling in and out of driveways. I cannot keep enough lube in there to stop it. I do not have experience with the other parts.

That's what I had heard. I don't think I'll get them after looking at the price. $50 for the set of poly vs $15 for rubber.

Jayson
[Image: 36319488731_8f2a376549_z.jpg]
73 Mach 1 Mustang
89 Dodge Shadow ES
94 Jeep Wrangler

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#4
Get some under the wheel traction bars. The shelby style not the cheap ones. This will help with traction (no more wheel hop) and it also helps with braking (no wheel hop)

'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
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#5
will e;27690 Wrote:Get some under the wheel traction bars. The shelby style not the cheap ones. This will help with traction (no more wheel hop) and it also helps with braking (no wheel hop)

I used this set up

http://www.calvertracing.com/caltracs.php
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#6
That's a bit pricey for me at the moment. Off topic question: how can you tell what type of diff you have ie 9", 8".

Thanks

Jayson
[Image: 36319488731_8f2a376549_z.jpg]
73 Mach 1 Mustang
89 Dodge Shadow ES
94 Jeep Wrangler

  Reply
#7
TheJ;27706 Wrote:That's a bit pricey for me at the moment. Off topic question: how can you tell what type of diff you have ie 9", 8".

Thanks

Here you go
http://www.kevinstang.com/Ninecase.htm
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#8
TheJ;27556 Wrote:I'm getting ready to redo the rear suspension are there any simple and relatively inexpensive upgrades I can do while I'm in there? I want to get a little better handling but still keep it streetable.

I was thinking of these:
175lb/in 4.5 leaf springs (maybe 195lb/in 5 leaf springs)
polyurethane bushings
KYB Gas-a-Just shocks

Thanks for looking

Those springs are entirely too stiff. The factory Competition Suspension springs were in the 135 lb/in range. I would recommend the 71 429 leaf, which is universal spring #42547. You can get them from most any spring or Mustang shop. Mustangs Unlimited has them for $80/each. They are firm enough to control the axle, but not so stiff that they don't follow the road surface.

Poly bushings are fine in the shackle, but skip them in the eye. I used NPD's HD rear shackle kit on several of my cars and was very happy with them.

KYB Gas Adjusts in the front are a good idea. Some guys run the KYB GR-2's in the rear as they feel the G-a-J's are too stiff. I have Gas Adjusts on all four corners, but I'm also running 225/70R14 tires and I have original leafs. When I put in new rear springs later this year we'll see how stiff the GaJ's truly are.

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#9
these were the traction bars i picked up
http://www.competitionengineering.com/ca...Code=13116

and i used KYB GR-2's as well, and hd shackels


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#10
Tnfastbk;27692 Wrote:
will e;27690 Wrote:Get some under the wheel traction bars. The shelby style not the cheap ones. This will help with traction (no more wheel hop) and it also helps with braking (no wheel hop)

I used this set up

http://www.calvertracing.com/caltracs.php
Hey Roy,Calvert posted a picture of my car on their web site! First Ford up! I couldn't beleive it. Sorry for stealling this post but,the Calverts are worth every penny!


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