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post #1 of (permalink) Old 03-08-2005, 08:24 PM
Nuggetruck
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YJ spring over conversion

What driveshaft mods need to happen if I do a spring over conversion, if I want 35 inch tires, what gear ratio would be good?
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post #2 of (permalink) Old 03-08-2005, 09:01 PM
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Re: YJ spring over conversion

Well an SYE kit is a must. 4.56s should work out well with 35s
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post #3 of (permalink) Old 03-08-2005, 09:05 PM
 
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Re: YJ spring over conversion

I'd say 4.10s...

I had 4.10s on my 33's and the jeep was worthless on the highway.

I'm now at 3.55 with the 33s and its perfect for a daily driver/trail truck.


As for the SYE.. highly recomended.. but if you SOA, and dump as much height as you can, (low profile spring pads, stock shackles) then you can get away with a 2" skidplate drop.. but i wouldn't wheel it like that, because you will throw the yoke on a regular basis.
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post #4 of (permalink) Old 03-08-2005, 09:22 PM
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Re: YJ spring over conversion

Unless you have a auto, Don't go less than 4.56 if you want to drive it anywhere. If you have an auto I can't tell you.

You will want a DC shaft for the rear, and if you move the axle forward 1 inch then the front shaft will not need modified.
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post #5 of (permalink) Old 03-08-2005, 11:40 PM
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Re: YJ spring over conversion

how many inches of lift can I get with a spring over, what size tires could I clear? without having to do a body lift?
post #6 of (permalink) Old 03-08-2005, 11:55 PM
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Re: YJ spring over conversion

Don't you own a Rubicon?

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post #7 of (permalink) Old 03-09-2005, 04:43 AM
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Re: YJ spring over conversion

If I remember right stock springs give about 5 inches of lift. So what 33's easy???
Soa with 2 inch lift springs clear 35's Beautifuly, Little fender trimming helps.
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post #8 of (permalink) Old 03-09-2005, 06:50 AM
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Re: YJ spring over conversion

If you are going SOA with your stock springs then you should expect about 5-5.5" of lift. I think that with a SOA on stock Springs with correctly installed bumpstops running 35's is not out of the question. If you go SOA with 2.5" springs, you could be up in the 36,37,38" tire range.

Mach2 nh has a really nice YJ set up on SOA, maybe he will post a photo of it.

If you plan on going any bigger than 33" tires you are going to be taxing your stock axles, and damage to them is not a matter of if, but more of when.
Also, if you are going to SOA on Stock springs, you are going to need some sort of traction bar to hinder spring wrap, otherwise your rear driveshaft won't last very long, and nether will your springs.

I would say that going with a SYE is a must, and then getting a CV style drive shaft... A good hit for this is to look for a late 80's Waggoneer in a Junk Yard. Grab the front drive shaft out of it, and have it retubed.. That will make a good rear for you.

Does your Jeep have a 6 cyl, or a 4 dinger in it. If you are going with 33-35" tires, I would say 4.10:1 R&P if you have a 6 cyl, and 4.56:1 if you have a 4 dinger.
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post #9 of (permalink) Old 03-09-2005, 07:10 AM
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Re: YJ spring over conversion

[ QUOTE ]
...if I want 35 inch tires, what gear ratio would be good?

[/ QUOTE ]

<font color="red">Go here first!</font> <u>Calculators</u>

It's always best to do your own math. Keep in mind how and where you want to use the Jeep. Off road only you can use a lower ratio. If you also want to run comfortably on the highway overdrive and a matching gear ratio would be recommended.

Good Luck

[img]images/graemlins/40BEER.gif[/img]
Dale
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post #10 of (permalink) Old 03-11-2005, 09:32 AM
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Re: YJ spring over conversion

say I just did the spring over, and didn't add extra lift with 2.5 inch leaves, I could do a body lift add a little height, but it sounds like my axles won't like 35's that much ne ways.

the rubicon belongs to my friend, he just wanted to get some info. I'm glad your so concerned about it though, ha
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