8" lift w/ 38 questions - Ford Powerstroke Diesel Forum
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post #1 of 23 Old 03-15-2009, 09:18 PM Thread Starter
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8" lift w/ 38 questions

can i run an 8" lift with 38 15.5 tires without rubbing...if so will i need to upgrade anything like gears an such?..
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post #2 of 23 Old 03-15-2009, 09:49 PM
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i have 8inch with 38x15.5x20, i can get a lil rub when stuffing them in a turn, but not bad.. i plan on going to 430 gears

2005 sd,cc,lb. afe intake , magnaflow 4in, 8inch lift 38x15.50x20s mickey t atz,,20x10 mht wheels,bushwacker flares
zoodad done.autometer z, sct canned tunes till studs get done
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post #3 of 23 Old 03-15-2009, 09:50 PM
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changing the gears will help keep tranny temps down and mpg up

2005 sd,cc,lb. afe intake , magnaflow 4in, 8inch lift 38x15.50x20s mickey t atz,,20x10 mht wheels,bushwacker flares
zoodad done.autometer z, sct canned tunes till studs get done
SOLD

looking for a new project
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post #4 of 23 Old 03-15-2009, 10:04 PM
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Quote:
Originally Posted by busa View Post
i have 8inch with 38x15.5x20, i can get a lil rub when stuffing them in a turn, but not bad.. i plan on going to 430 gears
yous is not leaf spring setup... so his is a lil different....

but to answer the OP question yes you will rub your leafs...

even with super wide off set you will rub... a 15.5 tire is just too wide.. just learn not to turn all the way.. its what most of us do... and yes you will have to regear... for that size 4.56 is a good setup....

hope this helps

-Raul


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post #5 of 23 Old 03-15-2009, 10:52 PM
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whats your rpms at highway speads with 456 raul? i didnt think that he might have front leafs as well

2005 sd,cc,lb. afe intake , magnaflow 4in, 8inch lift 38x15.50x20s mickey t atz,,20x10 mht wheels,bushwacker flares
zoodad done.autometer z, sct canned tunes till studs get done
SOLD

looking for a new project
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post #6 of 23 Old 03-16-2009, 09:45 AM
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it will rub, gears are NOT NEEDED but you might want them for more low end grunt. Some guys have been driving around with 37 - 38s with stock gears for years. i think there's even a guy here running 46's with stock gears.

with 4.56s and 38s you'll run approximately 65mph at 2000rpms and 80mph at 2500rpms
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post #7 of 23 Old 03-16-2009, 09:50 AM
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i have a 02 with leaf springs..and my toyos are 13.5 in wide..and mine rub..the leaf springs kinda wear a lil mark into the inside and it gets easier to turn but its still noticable and u can deff hear it

2002 F250 183K and countin!
Quadzilla intake
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8 inch lift
18in KMC Revolvers
37in Toyo MTs

MBRP exhaust real soon!
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post #8 of 23 Old 03-16-2009, 10:44 AM
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i have 8" and 38x15.50s and they rub, im bout to go up 2 more inches.



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post #9 of 23 Old 03-16-2009, 10:54 AM
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I have an 05 CC with 8" Fabtech lift and 38 15.5 Toyos...Never even been close to rubbing... Every truck appears to be different on here because of the wheel backspacing and what not... I am thinking about getting some 40's under my 8"...
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post #10 of 23 Old 03-16-2009, 11:02 AM
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Its all in the offset of the wheels... I am running 37's on a 4" lift with no body rub... Springs yes, but no body. You can lift it 20" and run 37's with the wrong offset and rub... The width of the tires is killing you... 15.5 is WIDE!

01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
Joe



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