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02-05-2009, 11:55 AM
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#1 | |
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Registered User
2006 TJ Wrangler
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mpg with 4.88 in Rubicon
i am going to put 4.88 gears in my 06 rubicon with the 6spd trasn and was tryin to get a idea on what my fuel economy was going to be. i have 35s
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02-05-2009, 10:01 PM
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#2 |
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Registered User
2005 LJ Wrangler
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i was about to post the same as well. also what would power be like vs stock 31s and 4.10s? i dont wanna loose my power nor RPM's be crazy
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2005 Unlimited Rubicon Hard N Soft Tops, Clayton Long Arm on RE Coils, Warn Bumper/Tire Carrier, Warn Winch N Bumper, Currie Steering, JKS Quicker Disconnects, JKS Front Trac Bar, Bilsteins, CO2 System..Yada Yada Yada |
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02-06-2009, 08:21 AM
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#3 |
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Fish fear me
 
2003 TJ Wrangler
Join Date: Jun 2005
Location: willamette valley oregon
Posts: 890
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4.88's and 35's put you right back in the torque zone of the stock set up. They work perfectly together. increased rolling and wind resistance will hurt your milage by about -2 mpg. My guess is you'll end up with 13 mpg avg. I get around 11-14 depending on how I drive, which usually is like I stole it. Build it, and buy a $500 Honda for commuting to work.
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2003 Lt. Khaki Rubicon automatic Supercharged 4.7 stroker w/ Hesco aluminum head 70mm F&B throttle body Kieth Black forged 944 pistons Comp Cams custom ground camshaft 505 Performance PCM Split Second Engineering fuel/timing management Tom Woods CV driveshaft 50 lb/hr Trick Flow injectors 4" Full Traction LA with Bilstein 7100's JKS 1" MM,BL. TeraFlex engine and steering armor 4.88's w/ 35 " Toyo Open Country m/t's Moser Chromoly axle shafts front, Superior D44 rear Warn 9.5ti on a M.O.R.E hi clearance bumper Reid racing knuckles, Warn premium hubs PIAA 525's, and 510's XBOX Gamertag- ISHAGDyurGURL For SALE-- standard drop pitman arm redrilled with new 1 ton GM tye rod end (bottom mount). Perfect $30 |
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02-06-2009, 11:31 AM
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#4 |
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Registered User
2006 TJ Wrangler
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Ya i plan on gettin the $500 honda soon
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02-06-2009, 12:30 PM
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#5 | |
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Just violated my Parole
 
2012 JK Wrangler
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with the pressure in my tires a bit higher than they should be and pure interstate cruising i can pull a steady 17 MPG
city though, 13-14
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USAF Blue Crush Build Quote:
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02-17-2009, 08:52 PM
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#6 |
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Registered User
2006 TJ Wrangler
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what pressure do u run your tires?
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02-18-2009, 11:33 AM
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Just violated my Parole
2012 JK Wrangler
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28 PSI generally
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USAF Blue Crush Build Quote:
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02-20-2009, 06:03 AM
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#8 |
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Member
1997 TJ Wrangler
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I'm also looking to replace stock gears with 4.88s. I have 33s on a stock suspension jeep. 2.5 liter engine. Stock 5 speed. Problem now is it is incredibly weak in 5th gear. I'm told this gear selection would be better than 4.56. I too want to keep decent mpg, since it is a daily driver and the majority of the time I am on paved roads. Any thoughts? Thanks for bringing up the topic.
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02-20-2009, 07:26 AM
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#9 | |
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Registered User
1997 TJ Wrangler
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Quote:
same set-up here but with 3.75 inches of lift, any thoughts? |
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