05 6.0 with 4.5'' lift - Ford Powerstroke Diesel Forum

Suspension & Steering Discuss OEM & aftermarket suspension, lifts, air ride suspension, shocks, steering components, etc.

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post #1 of 16 Old 08-19-2013, 01:24 PM Thread Starter
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05 6.0 with 4.5'' lift

i have a 4.5'' lift with 35x12.5r20 dick cepek tires, I want to put 37''s on it though, can I get them on with the lift I have and just trim the bumper or do I need more lift? if I need more lift how can I lift it more with out having to buy a whole new lift?
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post #2 of 16 Old 08-19-2013, 01:55 PM
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'Welcome to the org.

Not to be a jerk, but going from 4 to 6 or 6 to 8 gets beat pretty regularly. Yes, you need a 6 inch lift to run 37s if you don't want to trim. Another option, after it's lifted, is to put some square tube between the frame and bumper. I did this when I was running 14.5 wide tires.

An add-a-leaf out back a taller coil and a 6" lift drop bracket for your trailing arms should get you there.

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Last edited by Karls03; 08-19-2013 at 08:29 PM.
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post #3 of 16 Old 08-19-2013, 08:26 PM
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with the right wheel specs you can get 37's to fit with some trimming. So based on the wheel you want to run will decide the hight you need to clear 37's. stay with a 9" wide wheel on a 12.50 tire with a + offset around 18. check out carli suspension threads as those guys run 37's on 4.5" lift

2013 F150 FX4 EcoBoost fully loaded with the app pkg on Icon 2.5" coilovers
06 F350 Lariat-PMF 8" on 37'sSold
09 F350 ccsb Pmf 7" on 37's Sold
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post #4 of 16 Old 08-19-2013, 10:02 PM
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The Carli guys recommend 37"s with there 4.5 lifts. You can run 37's but the max rim width they recommend is 9" with a 5-5.5" backspacing. This is actually the exact set-up going on my truck as we speak but it will be 10-14 days till mine comes out as it is getting studded and extensive motor work as well.
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post #5 of 16 Old 08-20-2013, 07:11 AM
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It's all in how the lift is setup and what wheel and tire you go with. We fit 37" x 13.5" tires on our 4.5" kits all day. Hell, I ran the 37" x 13.5" on my 2.5" lift and they ran great with a bit of trimming. Full I would've eaten some fender at full compression, though.
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post #6 of 16 Old 08-20-2013, 07:23 AM
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A 13.5 will fit on a 9" rim, but it should be noted that over about 30 psi, you're going to start wearing more on the center than across the tread. I run my 315s at 40 psi on a 10" wheel to maintain an even tread wear pattern.

Wider wheels will put more tread on the ground, but will require more lift to clear them. Considering how much 37s are, I'd mount them on a 12" wheel to maximize my investment to the pavement.

However, if you're going to run a fat 13.5 inch tire on a thin 9 inch wheel to minimize lift requirements, then do yourself a favor and use the chalk method to determine what your best psi will be. I promise it will be no where near the 50 psi max on the sidewall.

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Karl and his 2003 6.0

Barefoot Accelerator Pedal
TRICO Force wiper blades
Yellow Military Aircraft Valve Stem Caps
Offensive "Stick Family" Decal
Big Ol'Honkin 1 1/4" Shank Receiver Hitch


WHAT!?! I was trying to list stuff that everyone else
hasn't already listed for their truck!




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post #7 of 16 Old 08-20-2013, 07:39 AM
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Personally on the 05-07 with 4 to 4.5 " of lift we like to see 35's unless you are using fiberglass fenders to minimize rubbing and maximize usage. On the 08 and up platforms, on 4 to 4.5" lifts with 37's function awesome!

Good luck with your build...

JP


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post #8 of 16 Old 08-20-2013, 09:24 AM
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post #9 of 16 Old 08-20-2013, 01:28 PM Thread Starter
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My rims are 5.5 backspacing, i thought about adding an add a leaf in the rear but i didnt know what i would need to put up front with the coil spring to give it an extra 2" lift in the front. Would it hurt to put a coil spring spacer or use a leveling kit block on the front?


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post #10 of 16 Old 08-20-2013, 01:29 PM Thread Starter
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I also have 20x9 rims


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