Lift/Tires/Gear Advice?
JK Enthusiast
Joined: Mar 2010
Posts: 441
Likes: 1
From: Some Place in Africa
08 Sahara 4-door automatic. Thinking about 4" lift with 35s. I was told I would not have to re-gear or chip if I stay under 6" lift. Any truth to this? I plan on light offroading in the near future, nothing too extreme. Plus I love the look of the JK lifted. This is also my daily driver, as well as only travel on freeway once a month, about 400 miles roundtrip.
JK Enthusiast
Joined: May 2007
Posts: 389
Likes: 0
From: Virginia Beach
Out of curiosity, after re-gearing to 5.13 or 5.38s, is it necessary to run a Superchips "performance tune", or do you just use the Superchips to properly set the tire size/gear ratio (and if so, could the AEV ProCal be used instead to save another $150)?
JK Enthusiast
Joined: Jan 2010
Posts: 484
Likes: 0
From: Rapid City, SD
Regear to 5.13s--$1000-$1500
4 BFG KM2 35x12.50R15 tires--$800
5 steel 15x8 wheels with 3.75" backspacing--$220
Superchips Flashpaq tuner--$330
Find a used 35x12.50r15 for a spare--$50
Mount and balance tires on wheels--$75
That is $2500-$3000 for tires, wheels, regear, and tuner.
Then, sell stock tires and wheels for $500.
Net cost is now $2000-$2500.
Then either:
Teraflex 2.5" BB--$480
4 BFG KM2 35x12.50R15 tires--$800
5 steel 15x8 wheels with 3.75" backspacing--$220
Superchips Flashpaq tuner--$330
Find a used 35x12.50r15 for a spare--$50
Mount and balance tires on wheels--$75
That is $2500-$3000 for tires, wheels, regear, and tuner.
Then, sell stock tires and wheels for $500.
Net cost is now $2000-$2500.
Then either:
Teraflex 2.5" BB--$480
JK Newbie
Joined: Mar 2008
Posts: 79
Likes: 0
From: Las Vegas Nv
Bigred- Same rig here. DONT run 35s WITHOUT the 513s and the Superchip... you wont be happy.
Arist- You dont have to use the tune but I use the 89 and love the mpg and preformance gains.
The gears are a must for the 35s, no way around them and the Superchip is a must after the tires and gears. You will love it.
Arist- You dont have to use the tune but I use the 89 and love the mpg and preformance gains.
The gears are a must for the 35s, no way around them and the Superchip is a must after the tires and gears. You will love it.
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 165
From: Austin <--> Colorado Springs
If you have the money, and plan on wheeling semi-hard, replacing the front D30 with a D44 wouldn't be a bad idea, just depends on your budget and use. (Decide on this 'before' you spend money re-gearing the 30...)
JK Freak
Joined: Oct 2010
Posts: 827
Likes: 0
From: Deadwood, sd
Originally Posted by planman
Well...the horsepower and torque output of the JK at different rpms isn't really subjective.
Truthfully, with an automatic, 3.73s at highway speeds with 35s and the OD turned off is better than 4.10s with 35s because it puts you at about the same rpm as 5.38s with the OD on.
So, an automatic with 3.73s and 35s with the OD turned off will not overwork the transmission from constant downshifting like a rig with 4.10s or 4.56s does. There is a reason why it doesn't seem to bad.
Still, when you regear to 5.13s--or 5.38s if you install a D44 front axle--I can pretty much guarantee you that you will experience that it was the very best bang for the buck modification you will have done so far.
Until then, keep the OD off and run a Superchips towing or 87 octane tune--directed to the OP.
