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Unread 06-29-2010, 07:38 PM   #1
khill8469
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2005 TJ Wrangler 
 
Join Date: Apr 2008
Location: plaistow nh
Posts: 527
Replaced u-joint, now I get better gas mileage?

two weeks ago i replaced my axle u-joints and both wheel bearings and now im getting better gas mileage. Does this make sense or is it just a coincidence?

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Unread 06-29-2010, 11:36 PM   #2
troys96xj
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1996 XJ Cherokee 
 
Join Date: Nov 2009
Location: Ravenna , OHio
Posts: 481
Makes total sense.You have proper operating units now.There no drag from the bad bearings.Everything is smooth.
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Unread 06-29-2010, 11:42 PM   #3
Bigmanboog
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1999 TJ Wrangler 
 
Join Date: Feb 2010
Location: League City, TX
Posts: 22
the new U joints and Bearings will lessen friction which. the less friction, less engine strain, equals better fuel economy. I wouldn't be surprised if your gas milage increased by a few MPG but you have to rate Jeeps in FPG( fun per gallon) verses MPG because the FPG is always higher in a Jeep
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Unread 06-30-2010, 03:27 PM   #4
BlueFlame
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2003 TJ Wrangler 
 
Join Date: Mar 2006
Location: Oregon USA
Posts: 8,398
It is amazing how much energy is consumed with vibrations.
When I first got my jeep the suspension wasn't set up well, and I had rear driveshaft vibes.
Adjusting the control arms to eliminate the vibration 'felt' like it freed up a bunch of power, and made a difference in gas mileage too.
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Unread 06-30-2010, 09:05 PM   #5
khill8469
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2005 TJ Wrangler 
 
Join Date: Apr 2008
Location: plaistow nh
Posts: 527
i did it all for safty andy to get rid of a squeak that was dring me up the wall. but if i knew i would get so much better gas mileage i would of done it a long time ago.
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u-joint , u joint , mpg , gas mileage , tj , wrangler

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