What RPMs do you cruise/shift at? - Page 2 - JeepForum.com
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post #16 of 27 Old 07-14-2011, 10:59 AM
Jerry Bransford
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First, don't forget a Jeep is not a car and generally speaking, the Jeep requires higher rpms for everything. Why? It has very poor aerodynamics, heavier weight (it is much heavier than most cars), and that it is turning much bigger tires than cars have to.

For me, I prefer my 4.0L be at 26-2700 rpms at 70 mph with my 35" tires, a few less rpms for smaller tires.


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post #17 of 27 Old 07-14-2011, 11:00 AM
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Originally Posted by TheBoogieman View Post
Around the 2300-2650 rpm range on flat and long hills at 65 mph.
I must be missing something. Just to clarify, you have the 42RLE 4sp auto with 35"s and 3.73 gearing, right? That'd mean your turning 2300rpm at 65mph and 2500rpm at 70 with your OD off, correct? Just trying to get my head around your 17mpg estimate. That's really impressive assuming it's accurate.


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post #18 of 27 Old 07-14-2011, 11:08 AM
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Between 2500 to a little over 3000 RPM. I haven't regeared yet, so 5 gear is useless and I don't use that. As far as gas mileage goes.... I don't really care if I get 5 miles to a gallon or 50 miles to a gallon, it's a jeep. I didn't by it for it's fuel economy. Its still better than my last car, where I was averaging close to $150 to $200 a week in gas.
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post #19 of 27 Old 07-14-2011, 11:08 AM
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Quote:
Originally Posted by flying_bosun View Post
I must be missing something. Just to clarify, you have the 42RLE 4sp auto with 35"s and 3.73 gearing, right? That'd mean your turning 2300rpm at 65mph and 2500rpm at 70 with your OD off, correct? Just trying to get my head around your 17mpg estimate. That's really impressive assuming it's accurate.
Why would he be shifting if he has an auto?

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post #20 of 27 Old 07-14-2011, 11:27 AM
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6 speed, 4.10's and 32" tires, I slowly shift at 2000-2500 if I'm just driving around town and not in a hurry. If I want to speed it up a bit, I shift 3000+ and shift faster. if I'm going up hill, add 1000+ RPMs to my figures


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post #21 of 27 Old 07-14-2011, 11:51 AM
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Quote:
Originally Posted by flying_bosun View Post
I must be missing something. Just to clarify, you have the 42RLE 4sp auto with 35"s and 3.73 gearing, right? That'd mean your turning 2300rpm at 65mph and 2500rpm at 70 with your OD off, correct? Just trying to get my head around your 17mpg estimate. That's really impressive assuming it's accurate.
I was giving rpm averages for all my 7 Jeeps.5 speeds,6 speeds and auto.I left the OD off on my auto and it turned around 2300 rpms at 65 mph.It pulled great and could easily do 90 mph with 35's.ALL of my Jeeps got 17 mpg highway or better with 35's.My 5 speed averaged under 2000 rpms highway.My brother's willys edition got 18 mpg highway with 35's and a 6 speed on several 300 mile trips.
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post #22 of 27 Old 07-14-2011, 11:55 AM
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Quote:
Originally Posted by TheBoogieman View Post
I was giving rpm averages for all my 7 Jeeps.5 speeds,6 speeds and auto.I left the OD off on my auto and it turned around 2300 rpms at 65 mph.It pulled great and could easily do 90 mph with 35's.ALL of my Jeeps got 17 mpg highway or better with 35's.My 5 speed averaged under 2000 rpms highway.My brother's willys edition got 18 mpg highway with 35's and a 6 speed on several 300 mile trips.
you need to open a Boogieman Jeep Driving school
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post #23 of 27 Old 07-14-2011, 12:04 PM
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you need to open a Boogieman Jeep Driving school
Slow and steady said the turtle.

p.s. My stock 03' auto with 275's didn't get any better mileage in the city than with my 35's (13 mpg).
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post #24 of 27 Old 07-14-2011, 12:16 PM
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i have started letting it get up to 3k rpms. I used to be a dogger, shifting at 2k or less. I have noticed shifting at 3k not only does it go into the next gear smoother, the transition into the next gear is less jerky. I have noticed an increase in gas mileage.

normally i was getting 300kms to a tank around town, and since changing my shift patterns i get around 325 - 350kms to a tank

keep in mind, you're not accelerating any faster to get to 3k than you would to get to 2k you're just holding it in that gear longer until you reach 3k. keep your foot light, be patient and enjoy the scenery!

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post #25 of 27 Old 07-14-2011, 12:21 PM
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Originally Posted by jeepsus View Post
i have started letting it get up to 3k rpms. I used to be a dogger, shifting at 2k or less. I have noticed shifting at 3k not only does it go into the next gear smoother, the transition into the next gear is less jerky. I have noticed an increase in gas mileage.

normally i was getting 300kms to a tank around town, and since changing my shift patterns i get around 325 - 350kms to a tank

keep in mind, you're not accelerating any faster to get to 3k than you would to get to 2k you're just holding it in that gear longer until you reach 3k. keep your foot light, be patient and enjoy the scenery!
What's a km? The metric system is dead in the US. I get over 325 miles per tank of gas.
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post #26 of 27 Old 07-14-2011, 12:24 PM
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your milage is sickening haha or wait maybe mine is!

i get 186 miles to a tank, my driving is literally stop and go, stop and go, go go go go go stop, go, left, go go go go go go stop, right, go go go go go go go go right. that's literally what i do 4 times a day. on the highway i don't doubt i could get 500+kms to a tank.

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post #27 of 27 Old 07-14-2011, 12:37 PM
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Up until the tank of gas that is currently in my Jeep, I have always shifted around 2500 and cruised at just under 2k. This tank, I have shifted above 3k almost every time and have put the pedal to the floor quite often. I have also been cruising 1 gear lower than I normally would (40mph used to be 5th gear, now it's 4th). I can't say for sure since the tank isn't gone yet, but it looks like I will be within 1 mpg of my normal mileage. The Jeep also seems to be running better, but that could just be me.

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