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Discussion Starter · #1 ·
How can you tell if you need new leaf springs, is there a way to look at it or what. I'm not sure if I need new or not. A friend at an autoshop told me I did but I what a second opinion.

Thanks John
65 Coupe I6
Inline Power

· Registered
3,604 Posts
The best way to tell, is the front of the car is higher then the rear. Looks like your car is doing a wheelie!
If they are the original spring the probably need replacing. I would do a matched set of front and rear spring from or any of the popular Mustang vendors.


1966 Mustang Coupe, 302 custom roller cam, holley 650dp,
1966 coupe and 1970 sportsroof
5,554 Posts
I just bought a matched set of 620 coils and 4 and a half leaves from Mustangs Plus. I can't recomened what it feels like yet because they ain't fitted yet, but the service was great and the springs have a lifetime garuantee....



· Registered
2022 Mach 1
638 Posts
If you fill up your gas tank and you lose your rear wheels in the fenders, then you need new rear leafs....If you hit a bump, and your backend goes way up and then slams back down, you need new rear leafs....

That is what made me realize mine needed to be replaced. I ordered the 4 and a half leaf spring kit from MustangsPlus....My original ones were 4 and a half.....

68 Diamond Blue Coupe
Sprint Promotion A
289 2bbl with a C4

College Station, TX

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· Premium Member
6,487 Posts
I had put a set of booster shocks in the rear many years ago to try and lift the rear. It helped some. Last year I had the leaf springs replaced at my local mustang shop. For the first time in 26 years, the rear sits as high as the front, and without the booster shocks.
Now 293 ci (.030" bore) with Holley 450 and 295,000 miles
MCA #49294
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