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post #1 of 4 Old 09-28-2015, 05:53 PM Thread Starter
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13 jk overheating

Hi I have a quick question I've already taken my 2013 Wrangler 2-door to the dealer because it was overheating they have replaced a couple parts. It has 3.21 gears 35 winch and bumper and this weekend I went up to Big Bear and on for low the temperature rise of three quarters on the gauge temperature is fine and idol and city driver I Drive it all day in the problems so I'm wondering if the gears would make the temperature rises I am planning to replace the gears so I was just wondering if the gears would have and effect on the cars temperature

Last edited by Franciscoceb; 09-28-2015 at 07:37 PM.
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post #2 of 4 Old 09-29-2015, 04:47 PM
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When you say "overheating" what do you mean by that? The temp gauge, which is a complete POS, goes past the mid point??

I have a 2013 as with 37s and 4.88s. It can hit 241 degrees at high speeds on steep grades.

So yes, your 3.21 gears and 35s are not making things better. But these Pentacrap motors run hot. Its the fan controls that allow those high temps.

You could regear and have the exact same outcome.
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post #3 of 4 Old 09-29-2015, 08:03 PM
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yes the gears do have a big affect on the engine temp, but that doesnt mean it's the problem. either way 35's and 3.21 gears are making your engine work full time. regear or put your stock tires back on

MISHIMOTO IS JUNK
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post #4 of 4 Old 10-07-2015, 09:50 AM
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2013 JKU w/ 37's tires and 4.88 gears and my temp runs around 220-226 in the summer. Biggest thing I do is I remove the Electric fan and washout the radiator from inside of the engine bay.

Jersey Crew


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