12JKjeep

Just bought 37's. I have 2012 JKU 3.5" RK X factor lift installed, 4:88 gears, I already upgraded my front axle. Do I need to upgrade draglink and tie rod? High steer or flip? Fox ATS?And should I get chromoly shafts for the rear stock 44? And will my bump stops for 35's and stock fenders work with 37's and flat fenders? Or should I extend them? I only wheel about twice a month on medium to moderate trails nothing extreme. and only drive about 5k miles per year. Thanks

nthinuf

A flip will be for poor steering from the lift, not for the 37's. Steering components can be upgraded as they fail, or as money comes available. You may as well run the stock stabilizer until it fails, unless you have nothing else to spend money on.

The stock rear axle shaft flanges aren't really known for their strength with larger tires. Probably a good candidate for upgrade. 30 spline, you can re-use stock shafts as trail spares. Or 35 spline for the strength upgrade.

Bumpstops will depend, stuff the tires and see where you are. If the shock is acting as your bumpstop, or the tires are contacting the flares, you'll have your answer.

12JKjeep

I guess your rite I won't upgrade steering components till I see my stock ones starting to ware a a little. And for bump stops I will disconnect and flex it out and see if I get rubbing, are the shocks acting as my bump stops going to hurt them at all if that's the case?

nthinuf

Instead of the bumpstops coming together and stopping further compression, a bunch of the vehicle weight would be smacking down on a shock. Probably not the best plan for long shock life.

12JKjeep

that's what I thought.

RKracing

A flip kit does help on the lift. Your ball joints will go soon enough based on our experience.
The factory ball joints will loosen up and you will then feel the steering wheel play.

12JKjeep

Already planned on synergy ball joints within a month or two.

12JKjeep

Also forgot to mention I do get a little bump steer when hitting bumps around town. But it's not as bad at highway speeds witch is weird. Anything that would help with the bump steer.

roscoj

If your getting bump steer it's because your steering geometry is off. This is caused by lifting the jeep. Anything more than 3" it's recommended to get a drag link flip kit. With your 3.5" you would benefit.
Remember if you do the drag link flip you will need to make sure you have correct bumpstop hight. In most cases 3" is enough. This will keep your draglink from contacting the frame.

12JKjeep

yeah I was thinking about the Synergy High Steer Correction Kit for $299 should help