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Unread 01-03-2014, 10:49 PM   #1
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Leaf Spring ID

Any accurate way to tell if my springs (79 CJ7, 304, TH400) are aftermarket or factory?
They are 2.5" wide.
The reason I wonder is they have a pretty decent arch and if they are stock they sure have held up well.
Is it common for aftermarket companies to stamp them/mark them in some way?
They have been rattle canned over.
The PO thought they had been replaced right before he got it and he only put about 5K miles on it when he owned it.

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Unread 01-03-2014, 11:36 PM   #2
only in a jeep cj
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1986 CJ7 
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If they are 2.5" wide up front, then they are not the original.
The later CJ springs ARE stamped with numbers that indicate soft/standard/Heavy Duty in soft and hardtop/4 and 6 cyl engines CJ-7/and Scrambler.....so yes, a lot of combinations.
The springs from the late 70s/early 80s are numbered as well, but I don't know how to decode those.

The OEM springs are stamped into the metal of the smallest leaf next to the center pin.
Aftermarket springs usually have painted numbers on the topside of the longest or main leaf.
If you post a picture of the spring pack binder, I can tell you a good probability if its OEM or not.

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Unread 01-05-2014, 11:55 AM   #3
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Correction- rears are 2.5", fronts are 2.0"
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Unread 01-05-2014, 06:17 PM   #4
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If they have marks from a metal break, they are Rough Country.....

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Unread 01-06-2014, 12:44 PM   #5
Corripe Cervisiam
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1985 CJ7 
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Originally Posted by bptactical View Post
...They have been rattle canned over...
I'm no expert, but if the original painted markings or labels are no longer visible, you might be able to narrow it down by looking at some of the other features of the springs:
  • Are the ends 'military wrap' or not?
  • What kinds of brackets are used to hold the spring pack together?
  • Are there any plastic/teflon pads/plates between the leaves?
  • Are the leaves tapered toward the ends?
  • Are the bushings original? If so, what color are they?

Providing some clear, detailed, close-up and wide photos might be useful here.
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