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Unread 06-24-2013, 09:48 AM   #1
jrv8984
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Rpm at 65 mph

When you are cruising at 65 mph, what's your tachometer reading. I am around 2300 rpm. It seems high to me.
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Unread 06-24-2013, 09:51 AM   #2
twistedlizard72
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My WK has a Superlift and 285/70's (speedo corrected) and turn about 1700 to 1800 RPM at 65.
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Unread 06-24-2013, 10:21 AM   #3
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Unread 06-24-2013, 11:50 AM   #4
NDSU_Bison
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That's about right. My stock 2008 CRD is at 2,000 RPM at 55 MPH which is the speed limit for the freeways on my daily commute.

I'm looking forward to trying out the 8 speed tranny on the 2014 ecodiesel if they ever start building them for American dealers.
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Unread 06-24-2013, 01:00 PM   #5
Zlartibartfast
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jrv8984 you are reading it right - ~2.3K RPM @ 65 MPH. The stock rear gear ratio in the WK CRD is 3:73 which is great for towing. @ 85 MPH it will be over 3.5K RPM.
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Unread 06-24-2013, 10:19 PM   #6
chevra
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Ya mine is around the same as that. Would be nice if it was a bit lower to increase the fuel mileage but they are right the 3:73 ratio is great for towing. Anyone ever hear of anyone swapping to a different rear gear ratio in a WK? Just curious.
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Unread 06-25-2013, 08:43 AM   #7
Jeepforthewin
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Quote:
Originally Posted by chevra View Post
Ya mine is around the same as that. Would be nice if it was a bit lower to increase the fuel mileage but they are right the 3:73 ratio is great for towing. Anyone ever hear of anyone swapping to a different rear gear ratio in a WK? Just curious.
No one currently makes different gearing for us Wk guys People have said a couple companies are thinking about making better gearing but nothing official that i know of.
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Unread 06-25-2013, 09:17 AM   #8
Zlartibartfast
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I believe fishinbama made a successful rear end swap to a 3:07 ratio
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Unread 06-25-2013, 11:10 AM   #9
chevra
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I believe fishinbama made a successful rear end swap to a 3:07 ratio
Is there a thread on that, be nice to see how it was done and what the results were.
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Unread 06-25-2013, 11:59 AM   #10
Jeepforthewin
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There is a thread on it. Once you read it though it may change your mind though. If you have a 4x4 you might as well forget about it but if you have a 2wd then you could possibly do the swap. Only bad part is if you read though his thread over the swap his computer flipped out and threw his Wk into limp mode because his transmission was throwing gear ratio codes. I'll look for the thread and post a link to it for you
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Unread 06-25-2013, 12:02 PM   #11
Jeepforthewin
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Here's the thread! The bulk of the thread his him changing to 3:21 but at the end he swaps them out for the 3:07 http://www.jeepforum.com/forum/f67/c...leted-1127766/
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Quote:
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Jeep's prefer the company of other Jeep's over that of other vehicles.
Quote:
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