I need Help for my project JK.
What gear ratio should I be running with 37” tires for performance back to stock ( daily driver, best overall performance ), if at 65 mph has 1850 RPM?
Specs : 08 Rubicon unlimited
2,8 l CRD engine L 4 ; 177 HP @ 3800 rot/min
460 NM @ 2000 rot/min
Automatic transmission 5 + 1 speed
Dana 44 front / rear 4.10
What size lift do I need to get in order to fit 37” tires ( best solution, no rubbing in off road)?
1. 4’’ standard lift kit + 1’’ Body lift ( not aesthetic )
2. 4’’ standard lift kit + 1-1 ¾ coil spacers
Which are the best Remote Reservoir Shocks ( maybe direct fit ), for this?
1. Fox Racing
2. Rancho RS9000XL
3. Rubicon Express
4. Bilstein
5. Others
Thanks for your help.

 

Axle ratio and tire size alone will put you at 4.88 gears to get back to "stock" when going from 32" to 37". Since the tires/wheel combo is likely WAY heavier, you'll more than likely want to go to 5.13, though.

Probably better off with a 4.5" suspension lift to clear the 37's. Lots of info to be had here. Seek and ye shall find.

 

I am running 35" tires and will be going to the 5.13. I wanted to set my self up to run 37" tires. Otherwise I probably could get away with running 4.88....

 

wait...what engine do you have? CRD L4??

You dont have a V6 like the rest of us?

 

For 37's, you should only consider 5.13's.

What are you looking to do with your JK? Are you going to be driving fast through the desert? or crawling over rocks etc?

 

Yes I am CRD engine 2,8 l , 177 hp, but good torque 460 NM/ rpm

 

TeraFlex has several different 4" kits that will work. Welcome to the forum!

 

I going to be driving in incline mud ( forest mountain ), snow in winter, and little rock crawling in summer. I also want to drive on road too. Stock features are perfect but over 37''.[IMG][IMG][/IMG][/IMG][IMG][/IMG][IMG]://i354.photobucket.com/albums/r437/Dan_Liviu/57.jpg[/IMG][/IMG][IMG][/IMG][IMG][/IMG][IMG][/IMG][IMG][/IMG][IMG]IMG]http://i354.photobucket.com/albums/r437/Dan_Liviu/IMG_7873_1.jpg[/IMG][/IMG]

 

Others pics :

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[IMG]IMG]http://i354.photobucket.com/albums/r437/Dan_Liviu/IMG_7873_1.jpg[/IMG][/IMG]