I'm actually pretty sure I'm at factory spec @35. But ill confirm and maybe go down to 32 at the lowest. Couldn't do it on the way to work a monsoon rolled through.

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Put fixed length front LCAs from JSPEC and caster went back to 4.2 degrees on Our TF leveling kit

 

i just put the same kit on my jku two week ago. i went with 33x12.50x15 tires. goodyear duratracs. i noticed a little floating too. i have been running 35psi in my tires. a friend told me to go down to 32psi. when i did it felt like i hooked a trailer to the back. and my milage went from around 16.8 to the mid 15's. went back to 35 and the mpg came back and so did my performance. the problem with that kit is that it is made to run with a stock length shock which meens they are extended almost all the time. as a result they are not as tight laterally. if i would have known about this before i might have went with the 2.5 coil lift with shocks. not that i don't like the lift , it's just that i am going to have to spend more money on shocks to fix the problem and i will have about the same amount of money in the 1.5 kit as the 2.5 by the time i'm done. i plan on getting a set of old man emu nitrocharger sports in the 0-2" lift length. by the way teraflex told me that a alignment would be a waste of money because it was not needed with this kit. i havn't had it checked so far.

 

Can you advise the jspec part #. And were you experiencing the same thing before you upgraded lcas?

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Thanks. I went and bought Rubicon take off shocks when i bought the lift. In hindsight i should have just bought new, proper height shocks. Thanks for your input.

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It seems you did about the exact same as me. TF leveling kit, rubicon shocks, etc. My jeep drives like crap, but I am 'used to it' now I guess. Lots of wandering and I've tried all sorts of tire pressures. I did put on an adjustable front track bar and that helped, but didn't solve the problem. I'm going to try shocks next as I think mine are pretty much crap anyway and I know that at least it won't hurt matters any...

 

JSPEC1620. 3/8 inch longer than stock

 

Guys, check your caster numbers. As you lift, the axles shift to one side and the pinions tilt up, lowering the caster. The higher you go, the 'flightier' the handling gets. You only went up 2", but that is 2" higher than stock, and is likely what you are feeling.

Some alignment shops offer 'free' checks. Or find the DIY alignment writeup (up in the writeups area - index stickied at top). Using an angle finder won't be anywhere near as accurate as a shop, but it will give you numbers for comparison.

As far as the alignments go - Unless you add components, the shop can 'not' adjust the Caster. They can 'not' adjust the Camber. They can 'not' Center the axles.

They 'can' adjust the Toe, but it should not have changed. (Unless you bent something?)
They 'can' center the steering wheel. (5 minutes and a wrench. Steps are in the writeup)

If you decide to adjust Caster, your choices are: Cam Bolts, Brackets, new Fixed arms (longer lowers or shorter uppers), or Adjustable arms (either upper or lower).

 

To the OP, good info right here! ^^^^ Light on caster can directly cause a flighty steering feel, best bet is to start there.

RK

 

Yessir, excellent, Thanks.

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