Im want to run 35" tires on my 08 four door rubicon with a 6 speed. Im looking at both the Teraflex 2.5" coil lift and the 3" kit. My question is do I have to have flex arms? This is my daily driver and need good road mannors,so whats everybody think?? Flex arms or not?

 

For a 2.5? Not really. When you get around 4" you will probably want front lowers to adjust castor, if you have a 2 door, you would also want rear uppers to adjust pinion.

 

We put the 2.5 TF on the OnlyRedHeads JK a couple of months ago with stock arms and all is fine. He is running 35 Mickeys on the stock wheels and it looks great.

He lives in South County, I am sure if you ask him he would be happy to show off.

I am running the 4" TF and would hate to think how bad it would be on stock arms. I have replaced all 8 arms.

If you get into the 3" sizes front lowers may be needed to correct castor and rear uppers may be needed to correct rear driveline angles. But you could be fine. This is a gray area ( kinda like todays weather) so there are no for sure answers.

For the price and the capabilty of doing some good offroading plus improving the stance the 2.5 TF is the way to go without needing to make a lot of extra corrections. Besides it can but installed in one day and your back on the road.

Big Green Jeep Off Of Hanover Rd.

 

2.5 here with OEM arms... I did add the front adj trac bar though

 

X2

 

2.5" you dont need control arms...........that said they are an awesome investment and well worth the money on any ride hieght!!!

 

for the 2.5" no. now the 3" TF kit will give you more toward 5" up front and 4" in the rear. yes you will need at least a pair for both front and rear and front drive shaft. the 2.5" is good to go as it sits nothing needed for that lift. This is what TF told me.

 

With the 6-speed and only 2.5" lift on an unlimited, you're probably going to be able to run stock driveshafts a long time, so I'd just spring for front lowers to dial in my driveability.
Or, if cash is tight, a set of FT uppers will allow you to increase your caster to a very driveable setting.

Either way, it'll be $200-300 well spent.

 

Your best bet would be to install your lift and have the alignment checked. I installed the TF 2.5 BB and found my caster was 2*. Was very flighty and followed the ruts in the highway badly. I don't know if the caster was off prior to the BB. Currently running OME hd springs and the TF adj lca's set at 5.7* and driveability is much improved.

 

I have the teraflex 3" kit with full flex arms. I drove the jeep with the front lowers about 5/8" shorter than my final setup (but still longer than stock). The Jeep drove like poo poo. With the lowers lengthened to get the caster back it's like a night and day difference.

With the teraflex 3" kit you'll probably only have 1*-2* of caster after the lift with the stock arms compared to 5* stock. Can it be driven that way? Sure. But'll the ride will be WAY better with the lower arms and 6* of caster.