Rpm at 65 mph - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > Rpm at 65 mph

Dan's Old as Dirt Birthday Sale!GEARSHADE Pocket Tops in stock and available at ROCKRIDGE Yukon Ultimate 35 axle kit for c/clip axles with Yukon Zip

Reply
Unread 06-24-2013, 09:48 AM   #1
jrv8984
Registered User
 
Join Date: May 2013
Location: Philadelphia, PA`
Posts: 28
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.
Thanks
07 GC CRD 4x4

jrv8984 is offline   Reply With Quote
Unread 06-24-2013, 09:51 AM   #2
twistedlizard72
Registered User
2007 WK 
 
Join Date: Apr 2011
Location: Piņon Hills, CA
Posts: 241
My WK has a Superlift and 285/70's (speedo corrected) and turn about 1700 to 1800 RPM at 65.
__________________
Kevin K.

WANTED: Steel Armadillo Sliders/Rock rails.
twistedlizard72 is offline   Reply With Quote
Unread 06-24-2013, 10:21 AM   #3
modernblueWK
Registered User
 
Join Date: Jan 2010
Location: Gunnison, CO
Posts: 1,849
1850-1900
__________________
2008 WK 4.7 245/70-17 Grabber AT2 - Magnflow - JBA - G2 - Steel Armadillo - MLL's
Blue WK club #4
modernblueWK is offline   Reply With Quote
Unread 06-24-2013, 11:50 AM   #4
NDSU_Bison
Registered User
2014 WK 
 
Join Date: Feb 2008
Location: Oregon
Posts: 683
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.
NDSU_Bison is offline   Reply With Quote
Unread 06-24-2013, 01:00 PM   #5
Zlartibartfast
Member
 
Zlartibartfast's Avatar
2007 WK 
 
Join Date: Aug 2007
Location: Menchaca, Texas
Posts: 417
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.
Zlartibartfast is offline   Reply With Quote
Unread 06-24-2013, 10:19 PM   #6
chevra
Registered User
2008 WK 
 
Join Date: Jan 2013
Location: esterhazy, SK
Posts: 220
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.
__________________
{08 Grand Cherokee North Edition} {3.0L CRD} {17" XD Addicts with 245/70/17 DuraTracs} {Rusty's Strut Spacers} {GDE Eco Tune and DPF Delete}
chevra is offline   Reply With Quote
Unread 06-25-2013, 08:43 AM   #7
Jeepforthewin
Lucky Charms!
 
Jeepforthewin's Avatar
2005 WK 
 
Join Date: Jan 2013
Location: Jacksonville, Fl
Posts: 2,071
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.
__________________
2010 JKU - Stock for now
2005 WK - 6" lift, 35" BFG's, a lot more (SOLD)
Jeepforthewin is offline   Reply With Quote
Unread 06-25-2013, 09:17 AM   #8
Zlartibartfast
Member
 
Zlartibartfast's Avatar
2007 WK 
 
Join Date: Aug 2007
Location: Menchaca, Texas
Posts: 417
I believe fishinbama made a successful rear end swap to a 3:07 ratio
Zlartibartfast is offline   Reply With Quote
Unread 06-25-2013, 11:10 AM   #9
chevra
Registered User
2008 WK 
 
Join Date: Jan 2013
Location: esterhazy, SK
Posts: 220
Quote:
Originally Posted by Zlartibartfast View Post
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.
__________________
{08 Grand Cherokee North Edition} {3.0L CRD} {17" XD Addicts with 245/70/17 DuraTracs} {Rusty's Strut Spacers} {GDE Eco Tune and DPF Delete}
chevra is offline   Reply With Quote
Unread 06-25-2013, 11:59 AM   #10
Jeepforthewin
Lucky Charms!
 
Jeepforthewin's Avatar
2005 WK 
 
Join Date: Jan 2013
Location: Jacksonville, Fl
Posts: 2,071
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
__________________
2010 JKU - Stock for now
2005 WK - 6" lift, 35" BFG's, a lot more (SOLD)
Jeepforthewin is offline   Reply With Quote
Unread 06-25-2013, 12:02 PM   #11
Jeepforthewin
Lucky Charms!
 
Jeepforthewin's Avatar
2005 WK 
 
Join Date: Jan 2013
Location: Jacksonville, Fl
Posts: 2,071
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/
__________________
2010 JKU - Stock for now
2005 WK - 6" lift, 35" BFG's, a lot more (SOLD)
Jeepforthewin is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.