Jump to content

New Spring advice front and rear, Height of fenders, Passenger side rear is lower by 5/8" now....or maybe a bit lower.


Recommended Posts

After 50 years it could be a million things causing the height to be slightly different side to side…..if you get it close, like 1/2” (your number may be different)or so or less no one will know save for yourself :) Some say that after 50 years the torque that is applied from one side of the car vs another will cause the chassis or other suspension related parts to take “a set” or bend a bit……so it can and could be a myriad of things. Agreed that air shocks are really a last resort as they really throw something of a wrench 🔧 into the works as to how your springs actually do their job. My rear springs came from EATON. The front springs were on back order for months….so I went with some 600 pound springs from Scott Drake which have worked wonderfully on a bunch of cars for me (springs for this year model but NOT as specific as they would have been via Eaton to be sure:)) I will post pics when completed. Also my front springs needed new perches which I replaced.

 

Best,

Brad

 

My Original (from High School!) 1972 Mach 1 / 2014 F150 / 2018 Porsche Panamera

 

 

 

Link to comment
Share on other sites

Thanks for the info. I don't know alot of detail about what was replaced on my car before I got it but I'm sure that some of the rear body parts were. If air shocks are out, how about using custom length shackles to slightly raise and even up the rear? Any other ideas?

Link to comment
Share on other sites

1 hour ago, Idaho Chris said:

After 48 years, my '73 sat slightly low on the driver's side.  I didn't measure it, but it could certainly be noticed looking straight on from the rear.

I replaced the springs with Eaton springs and new stock length Eaton shackles.  Now the car sits even side to side.  Eaton makes three different springs for our cars; Standard, Competition and Boss.  I installed the Competition springs and I am happy with the selection.

As far as the typical rear squat our cars have, I corrected that at the same time by cutting 1/2 coil out of the front springs.  Photos show stance now.

 

20210825_140709.jpg

20210825_141814.jpg

20210825_140325 (002)a.jpg

Your ride looks outstanding!!

Edited by rio1856

Just remember John Wick didn’t kill all those people for a random car. It was a Mustang

Link to comment
Share on other sites

7 hours ago, Bufus said:

Thanks for the info. I don't know alot of detail about what was replaced on my car before I got it but I'm sure that some of the rear body parts were. If air shocks are out, how about using custom length shackles to slightly raise and even up the rear? Any other ideas?

Eaton make a 1" longer shackle kit sold at NPD, but I guess at a pinch, you could make a set of custom shackles. Still may not be the correct fix. How does the car look from the back? Does it look "off", like it's sagging to one side? 

My guess is the springs are no longer the same arch, i.e. one spring has sagged more than the other. If your car body is not twisted and the rear frame is all good, then it has to be the springs. Nothing else make sense to me. 

Geoff.

 I learn something new every day!

Link to comment
Share on other sites

Well it has new springs front and rear. Now that I look at the back,  I can see it from there too. Check out the picture. This picture also makes me ask what size tires/wheels are yall using on your mustangs???20211011_181842.thumb.jpg.d34a32075f5733af3c94806b4d79f28d.jpg

Edited by Bufus
Link to comment
Share on other sites

11 hours ago, Bufus said:

....This picture also makes me ask what size tires/wheels are yall using on your mustangs???

My car leaned about the same amount as yours to the driver's side before I installed the new Eaton leaf springs.

As for wheels/tires:

I'm running Wheel Vintiques Magnum 500's; 15x8 rear and 15x7 front.

Tires are BFG 245/60R-15 rear and 225/60R-15 front.

Edited by Idaho Chris
 
"The biggest argument against democracy is a five minute discussion with the average voter."
 
-Winston Churchill
Link to comment
Share on other sites

13 hours ago, Bufus said:

Well it has new springs front and rear. Now that I look at the back,  I can see it from there too. Check out the picture. This picture also makes me ask what size tires/wheels are yall using on your mustangs???20211011_181842.thumb.jpg.d34a32075f5733af3c94806b4d79f28d.jpg

Holy heck batman! Do you have a "fat lady" sitting in the passenger seat?? 

That's some lean to say the least. You say you have "new springs", but what brand? Did you check them side by side before installing them? Is it at all possible you inadvertently have one spring standard eye and the other reversed eye. That's a real long shot but something is very definitely OFF!! As for tire size, I have to assume your rears are the same. I'm fishing for sure now, 

On mine, I have 14" Magnum 500's with 245-60-14 rear and 235-60-14 front on 8" and 7" rims. 

Geoff.

 I learn something new every day!

Link to comment
Share on other sites

The springs are from CJ Pony Parts. They are both the same. The difference on the back is 5/8".  If I change the shackles, will I have to loosen all of the bolts holding the leaf springs or can I just take the shackles off?

Edited by Bufus
Link to comment
Share on other sites

Just take the shackles off, after you support the car.

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

Link to comment
Share on other sites

This is bothering me somewhat as to what is going on. One thought I just had is this. When the car is up on jack stands, wheels off, can you measure vertically from the frame rails down to the springs. Either in front or just behind the axle. My thinking is if one spring has sagged, the dimension ought to be off by the 5/8" you are seeing. 

Going back to my own problems with rear springs and as I have commented on many times, I had bought a set of Grab-a-Track 4 1/2 leaf springs. The extra 1/2 leaf is supposed to help stop spring wrap up on my "one wheeler peeler" (open diff). The problem was they were way too high, lifting the rear by 1 3/4 inches. I had the springs de-arched, but then they started to reverse bend. I started to research and only found Eaton reveal the steel type they used. Even Dayton Springs, another huge US spring maker, did not give the steel type. What I did find is some aftermarket manufacturers use a steel know as 4140, whish is a pre-hardened steel used in tool making. It is not heat treatable beyond that. Eaton use SAE 5160 spring steel. That is why I would ONLY suggest Eaton Detroit Springs to anyone wanting correct rear springs. 

Geoff.

 I learn something new every day!

Link to comment
Share on other sites

Eaton supplies good kit. Great service and knowledgable staff also.

My Original (from High School!) 1972 Mach 1 / 2014 F150 / 2018 Porsche Panamera

 

 

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...