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  Mustangsandmore Forum Archive
  '64 1/2 to '68 1/2 -- The Classic Mustang
  Rear shackles

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Author Topic:   Rear shackles
Dreamcometrue
Gearhead

Posts: 903
From: New-Brunswick,Canada
Registered: Apr 2004

posted 10-18-2004 11:35 AM     Click Here to See the Profile for Dreamcometrue        Reply w/Quote
Hi. Has anyone ever used longer shackles to increase the height of the rear of his Mustang?
Thanks, Rino

SundanceKid
Gearhead

Posts: 1302
From: UT
Registered: Feb 2001

posted 10-18-2004 02:53 PM     Click Here to See the Profile for SundanceKid        Reply w/Quote
That was standard issue in the 70's and 80's! Not the best way to raise the rear though. It causes all kinds of wierd movements in the suspension. If you do a shackle raise keep it below 2" and even with 2" of shackle lift your only going to gain about an inch in actual height.

68 Coop
Gearhead

Posts: 5847
From: Mesquite, NV. 89027
Registered: Oct 2004

posted 10-18-2004 03:06 PM     Click Here to See the Profile for 68 Coop        Reply w/Quote
I have the 3 hole on my car, and it sits too high for my taste. Gonna get rid of them, just waiting to do ALL the bushing at the same time.

------------------
William

68 Coupe
Stock 289
Edelbrock 600/RPM Intake
Ignitor/Flamethrower
Thorley's with Da Bomb's
C4
2.79's out back(for now)
15"x7" AR ASTRO's(needin' new tires)
"Project Under Construction"

indyphil
Gearhead

Posts: 3394
From: Senoia, G.A. USA
Registered: Jul 2002

posted 10-18-2004 03:30 PM     Click Here to See the Profile for indyphil        Reply w/Quote
You may be able to get a different curve on your springs to achieve the same thing. Im not really into raising mustangs though - most folk are going in the opposite direction.

I actually bought the extra thick HD shackles for more stability. I cant imagine driving on stilts.

------------------
'68 coupe, '66 289 C code
engine, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm

ddenton749
unregistered
posted 10-18-2004 04:02 PM              Reply w/Quote
The other thing it tends to do if shift weight forward, which hurts handling and braking. You would be better off as indy says and re-arc your springs or put 5 leaf springs in.

------------------
'73 Convertible, 351C 2V
'91 LX Convertible 5.0
Member: Valley Forge Mustang Club
"Tank, I need an exit."

Fastymz
Moderator

Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001

posted 10-18-2004 05:26 PM     Click Here to See the Profile for Fastymz        Reply w/Quote
If you want a cheap fix until you can get new springs. You would be better off using some spring helpers. Made to help with tow load. They will raise the rear end alittle. I used them for about 2years. I think I paid $20 for a pair. I jacked the rear up first until the load was off the springs. Installed the over load, or spring helpers. It raised the car about 1.5".
I don't like the looks of the longer shackles. The spring helpers do make the ride alittle more firm.

I like the look of a NON lowered Mustang. Maybe I'm old school, but I still like the rear to sit alittle higher then the front.
You guys can have your weed pullers. I'll stick with my noise bleed.

------------------
SCOOP

oddly obsessed with big scoops on little Mustangs

65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc.

My Pics

68 Coop
Gearhead

Posts: 5847
From: Mesquite, NV. 89027
Registered: Oct 2004

posted 10-18-2004 06:15 PM     Click Here to See the Profile for 68 Coop        Reply w/Quote
I agree, I like the "Hot Rod" look too. I am going back to the stock ones, but might as well wait till the bushings are done.

------------------
William

68 Coupe
Stock 289
Edelbrock 600/RPM Intake
Ignitor/Flamethrower
Thorley's with Da Bomb's
C4
2.79's out back(for now)
15"x7" AR ASTRO's(needin' new tires)
"Project Under Construction"

[This message has been edited by 68 Coop (edited 10-18-2004).]

Dreamcometrue
Gearhead

Posts: 903
From: New-Brunswick,Canada
Registered: Apr 2004

posted 10-18-2004 06:27 PM     Click Here to See the Profile for Dreamcometrue        Reply w/Quote
Hi guys. Fastymz is right. I want a cheap fix. My rear springs are way too soft. Might even be the original ones. My tires rub when I hit a bump and I have 215/70r15 on 7" rims. Guess I might as well wait next year, I'll put new ones on. BTW I like the Hot Rod look too.
Thanks, Rino

Fastymz
Moderator

Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001

posted 10-18-2004 06:38 PM     Click Here to See the Profile for Fastymz        Reply w/Quote
This is what they look like. I got mine at PepBoys, but any big auto parts store will have something like it.

http://www.helpersprings.com/

------------------
SCOOP

oddly obsessed with big scoops on little Mustangs

65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc.

My Pics

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 10-18-2004 07:06 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
I'll never forget the time a friend have a pair of those tall shackles on the back of his '72 Sportsroof and they collapsed on him, taking out his rear quarters.

Absolute total junk. They'll make your car handle like crap too.

------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

Bob429
Gearhead

Posts: 545
From: Watervliet,MI,USA
Registered: Jun 99

posted 10-18-2004 07:28 PM     Click Here to See the Profile for Bob429        Reply w/Quote
I did have shackles on the back of my car. It handled like crap. You can see them on my photo page. They were about 3". I removed them and put on a set of new leafs with original set of Standard height shackles. What a difference. I didn't realize how weak the old springs had gotten. The new springs raised my car about 3 " back to standard height and now it handles great. I would either buy a new set or have the old ones re curved and keep the original style shackle. Just my $.02

------------------
Bob
Member#39
71 J code
429 SCJ-R Sportsroof
C6 4:11
http://www.mustangsandmore.50megs.com/MembersPics/Bob429.html
2004 Pure stock muscle car Drags pics now on my page.

[This message has been edited by Bob429 (edited 10-18-2004).]

Dreamcometrue
Gearhead

Posts: 903
From: New-Brunswick,Canada
Registered: Apr 2004

posted 10-21-2004 08:06 AM     Click Here to See the Profile for Dreamcometrue        Reply w/Quote
Well I guess my best bet will be to get brand new springs next year. Thanks for your input.
Rino

Fastback68
Gearhead

Posts: 4511
From: Sucat, Paranaque, Philippines
Registered: Jul 99

posted 10-21-2004 08:28 AM     Click Here to See the Profile for Fastback68        Reply w/Quote
quote:
They were about 3". I removed them and put on a set of new leafs with original set of Standard height shackles.

Bob, do you mean they were 3" longer than standard shackles? Weren't the original ones at least four or five inches long?
Also Phil, you say you have extra thick shackles for stability. I think all mine are about a third of an inch thick. Would that qualify as thick?

indyphil
Gearhead

Posts: 3394
From: Senoia, G.A. USA
Registered: Jul 2002

posted 10-21-2004 09:18 AM     Click Here to See the Profile for indyphil        Reply w/Quote
I cant remember what thickness mine were. i think something like that, maybe 1/2 inch?

Mustangsplus sell them. And they came with Poly bushes as well. the stock ones were flimsy stamped affairs with a little ridge in them to create some strength. I dont like the crazy lowered look, but I dont mind an inch. My front is lowered about an inch and my rear is stock height with new springs.

the old springs were sagging badly. I guess its true that with time your rear end will sag and look unsightly...

------------------
'68 coupe, '66 289 C code
engine, edel 600cfm carb, performer intake, dual exhaust http://www.geocities.com/ottouk_77/68mustang.htm

68 Coop
Gearhead

Posts: 5847
From: Mesquite, NV. 89027
Registered: Oct 2004

posted 10-21-2004 12:57 PM     Click Here to See the Profile for 68 Coop        Reply w/Quote
I posted this in my thread, but NPD has replacement shackles with poly bushings. You can get either 3/8" or 9/16" adjustable. Throw in the front eye poly bushings, and you get the set for $60.00. They also have 4 and 5 leafs for less than $150. CHECK with these guys first, they sponser us. Just my .02 and I hope it all turns out the way you want it to.

------------------
William

68 Coupe
Stock 289
Edelbrock 600/RPM Intake
Ignitor/Flamethrower
Thorley's with Da Bomb's
C4
2.79's out back(for now)
15"x7" AR ASTRO's(needin' new tires)
"Project Under Construction"

Bob429
Gearhead

Posts: 545
From: Watervliet,MI,USA
Registered: Jun 99

posted 10-21-2004 09:36 PM     Click Here to See the Profile for Bob429        Reply w/Quote
Yep 3" Longer than the standard Shackle

------------------
Bob
Member#39
71 J code
429 SCJ-R Sportsroof
C6 4:11
http://www.mustangsandmore.50megs.com/MembersPics/Bob429.html
2004 Pure stock muscle car Drags pics now on my page.

Steve-UK
Gearhead

Posts: 392
From: Wickford, Essex, England
Registered: Jan 2003

posted 10-22-2004 04:34 AM     Click Here to See the Profile for Steve-UK        Reply w/Quote
When I first got my 66 coupe the rear shackles were 4" over stock, as the rear springs were bending the wrong way. The handling was horrific If you pushed on the trunk you could see the shackles move sideways. I changed over to G/W springs and Del-a-lum bushings, the change in the handling was great.

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