[JMW1191]

I wanted to know if i could put the 5.5 in RE coil springs on my 09 jeep rubicon 4 door with a RE 4.5in long arm kit. Or would that not work? Let me know

[shockwave562]

I would think so. since you have all the upgrades there should be no difference, you already have long arms, and an adjustable trackbar I imagine. as long as your brake lines are long enough you should be good. I think the shocks for the 4.5 and the 5.5 are the same so you should be good there too. you might need longer sway bar links but I can't promise that. just a guess

my only question is what are you trying to run? 37" tires now?

EDIT* if you're going to do it yourself remember to readjust your track bar and center your steering wheel when you're done, you might also need to take it to an alignment shop to make sure your caster is still right on your arms

[JMW1191]

SO would i have to replace the coils? or just adjust everything to make it work? I know that there are the 3.5-4.5 coils and 4.5- 5.5 coils. I want to run 37's but still get good flex. What else could i do?

[igofshn]

Just replace the coils and dial in the control arms. You might have to adjust the track bars also.

[shockwave562]

New coils and adjustments and you'd have it.

Now since you've already got excelent flex with your long arm and 4.5 I'd reccomend a small body lift. 1.5'' ought to fit 37s

[shockwave562]

which coils do you have? the reason it says 3.5-4.5 is because 4.5 is the max lift they will have, if you have a 4 door and the lift has been on a couple of years it might be more like 3.5

[Imped]

You don't need more height for 37's. You need to use your HEAD. Taller springs will just give you more up travel. Up travel is totally irrelevant to flex. Droop is where it's at and with your current shocks, you'll have less of that with taller springs. If you want more flex, you'll need longer shocks (to allow more droop) and relocated brackets in order to accommodate longer shocks while still providing you with a decent 4-5" of up travel. I would outboard the rear shocks....then adjust the bump stops accordingly. Lifting your rig up another inch will just make an already high COG higher.

[shockwave562]

Originally Posted by imped4now

You don't need more height for 37's. You need to use your HEAD. Taller springs will just give you more up travel. Up travel is totally irrelevant to flex. Droop is where it's at and with your current shocks, you'll have less of that with taller springs. If you want more flex, you'll need longer shocks (to allow more droop) and relocated brackets in order to accommodate longer shocks while still providing you with a decent 4-5" of up travel. I would outboard the rear shocks....then adjust the bump stops accordingly. Lifting your rig up another inch will just make an already high COG higher.

well he's right in a sense, but I need to know which kit you have. if you have the 4.5-5.5 lift you can fit 37s already with no problem.

if you have the 3.5-4.5 then you will need larger coils to FIT 37s

That said both kits likely have the same shocks which means you are going to have plenty good flex, even after adding the larger tires

[JMW1191]

I have the Rubicon Express 4.5in lift heres the link:

Rubicon Express 4.5" Extreme-Duty™ Long Arm Suspension System for 07-10 Jeep® Wrangler Unlimited JK 4 Door - Quadratec

Ive only had the lift for about 3 months. I just want it a little bigger. It flexes like crazy.. but i was talking to a friend about puttin the 5.5 in coils on it, but wasnt sure if that was possible.. and if it would make a difference..

[Imped]

Answer a couple questions for me with logical answers, please.

1) Why do you need more lift when you already have enough?
2) What makes you unsure about it being "possible?"
3) How would 1" taller springs not make a difference?

[shockwave562]

Originally Posted by imped4now

Answer a couple questions for me with logical answers, please.

1) Why do you need more lift when you already have enough?
2) What makes you unsure about it being "possible?"
3) How would 1" taller springs not make a difference?

What he is trying to say in a very polite fashion is that you can fit 37s with your current lift. the RE 4.5 will accomidate 37s. just buy bigger tires and you're good to go.

Originally Posted by JMW1191

I have the Rubicon Express 4.5in lift heres the link:

Rubicon Express 4.5" Extreme-Duty™ Long Arm Suspension System for 07-10 Jeep® Wrangler Unlimited JK 4 Door - Quadratec

Read the link. it says right there that the lift can accomidate 37s. I don't think you need any more lift.

If you're dying for extra room for tires then get a body lift This one is $100 for 2 inches.

Performance Accessories 992 - Performance Accessories 2" Body Lift for 07-10 Jeep® Wrangler & Wrangler Unlimited JK with Automatic Transmission - Quadratec

again you don't need it for 37s... this is just if you want a little more space for tires, especially when flexing

[shockwave562]

by the way, RE doesn't sell 5.5" lift springs. some companies offer 5" springs and some offer 6" springs but REs biggest is 4.5

[JMW1191]

alright the only reason i would get more lift is so i would have more flex when i have 37's.

[shockwave562]

Originally Posted by JMW1191

alright the only reason i would get more lift is so i would have more flex when i have 37's.

you're not going to get more flex then you have. you're only going to be able to fit bigger tires. keep that in mind and good luck to you.

[Imped]

Originally Posted by JMW1191

alright the only reason i would get more lift is so i would have more flex when i have 37's.

Please read what I said above. Once you realize what "flex" is and where it comes from, you'll realize how ignorant your statement is. I'm not bashing you but you're clearly not comprehending what I'm saying. Flex DOES NOT=suspension height. It's literally irrelevant.