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Unread 02-10-2013, 06:08 AM   #1
yayaisland
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CJ5 rear leaf spring installation

I purchased the ProComp 4'' front and rear leaf springs and U bolt package the other day for my 76 cj5 and I am not sure witch shims to put on. The U bolt package comes with 4 shim plates 2- 2 1/2 degree shims and 2- 2 degree shims. The jeep already has a 4'' lift on it but I just wanted to upgrade her from old parts to new parts. Also as far as I can tell just by looking at it there are no shims currently on the rear springs.
Dose anyone have a better idea than me??

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Unread 02-10-2013, 06:19 AM   #2
skizriz
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Whichever shim needed, if any, to give you the proper pinion angle.
There's tons of good reading on pinion angles.

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Unread 02-10-2013, 08:52 AM   #3
LimeLite
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Are they all the same width? 2 may be intended for the front. Are they steel or aluminum? I had aluminum on mine and they got pretty tore up, I ended up getting some steel ones. Just a word of advice, if you're going to wheel it.
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Unread 02-10-2013, 09:43 AM   #4
bligon64
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What are you planning on doing with your old spring/ how bad of shape are they in?
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Unread 02-10-2013, 12:19 PM   #5
yayaisland
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The shims are aluminum and when I took the first leaf off there was no shim what so ever on it so I believe the other side won't as well.

The springs are really not bad at all from what I can tell. I just wanted to swap them out for piece of mind since #1 I'm not sure how ruff the previous owner was on them and #2 I have a jeep run to go to next month and don't want a busted leaf or u bolt to be a problem.

Just ran into a problem. Dropped the first leaf and the original u bolts are flat towards the top and then round off. The u bolt kit I bought from ProComp are fully round and do not fit around the axel I told the guy at 4wheel parts that mine were flat and he said it would be no problem. Well... it is a problem due to the fact that I know for a fact that even if I do get them on, they wont fit into the mounting plate.
So now I have that dilemma to work on. Oh, plus I can't find any flat u bolts online either.
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Unread 02-10-2013, 12:22 PM   #6
yayaisland
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.
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Unread 02-10-2013, 12:23 PM   #7
yayaisland
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Quote:
Originally Posted by bligon64 View Post
What are you planning on doing with your old spring/ how bad of shape are they in?
Was goanna throw them away. Why do you ask?
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Unread 02-10-2013, 12:48 PM   #8
yayaisland
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Quote:
Originally Posted by LimeLite View Post
Are they all the same width? 2 may be intended for the front. Are they steel or aluminum? I had aluminum on mine and they got pretty tore up, I ended up getting some steel ones. Just a word of advice, if you're going to wheel it.
The 2 1/2 ones are 2 1/2 wide and the2 are 1 3/4.
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Unread 02-10-2013, 03:29 PM   #9
bligon64
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Well if there still usable I wanted to see if youd be willing to sell them/ ship them.
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Unread 02-10-2013, 10:43 PM   #10
LimeLite
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Quote:
Originally Posted by yayaisland View Post
The 2 1/2 ones are 2 1/2 wide and the2 are 1 3/4.
sounds like 2 are for front and 2.5 for rear then. I'm pretty sure when I was complaining to their customer service rep about my horrible shackle angle and the consequent inverting of them, he mentioned something about using the front shims (which I hadn't)
You can find a lot of debate in the archives about using them on the front, but if you do, you should probably use steel, and take the leaf spring center pin out and make the shim part of the spring pack, so it doesn't spit out on ya.
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