Replaced u-joint, now I get better gas mileage? -

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post #1 of 5 Old 06-29-2010, 06:38 PM Thread Starter
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2005 TJ Wrangler 
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Location: plaistow nh
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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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post #2 of 5 Old 06-29-2010, 10:36 PM
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Makes total sense.You have proper operating units now.There no drag from the bad bearings.Everything is smooth.
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post #3 of 5 Old 06-29-2010, 10:42 PM
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1999 TJ Wrangler 
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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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post #4 of 5 Old 06-30-2010, 02:27 PM
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2003 TJ Wrangler 
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Location: Oregon USA
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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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post #5 of 5 Old 06-30-2010, 08:05 PM Thread Starter
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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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