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Topic Review (Newest First)
05-28-2012 10:29 PM
Dylanjwhall 63ish, 2012 6 speed 4.10 gears stock wheels and tires
05-28-2012 09:41 PM
joe002
Quote:
Originally Posted by Osage Orange View Post
I thought the thread simply took an odd turn at first, ha ha. Ive only had mine in 4 HI so far pulling a trailer on my hilly property, no rpms observed though.
Take that sucker off road, put it in 4 Low and 1st, and check out the power/torque and see how you can crawl over things.
05-28-2012 09:37 PM
Osage Orange
Quote:
Originally Posted by joe002
Sometimes I wonder if some actually read the posts in the middle.
I thought the thread simply took an odd turn at first, ha ha. Ive only had mine in 4 HI so far pulling a trailer on my hilly property, no rpms observed though.
05-28-2012 09:17 PM
kjeeper10
Quote:
Originally Posted by joe002
Sometimes I wonder if some actually read the posts in the middle.
05-28-2012 09:13 PM
joe002
Quote:
Originally Posted by kjeeper10 View Post
Crawling in 4 lo dudes
Sometimes I wonder if some actually read the posts in the middle.
05-28-2012 08:22 PM
kjeeper10 Crawling in 4 lo dudes
05-28-2012 01:48 PM
Osage Orange
Quote:
Originally Posted by joe002
I know there are a lot of differences in the automatic/manual, pre-2012/2012+, gears, etc. but I was wondering how fast are you going when your engine is at 2,100 RPM?
Ok, heres mine: 65 mph on the gps, 67 on the speed indicator in 6th gear. Mines a 2012 with 3.73 gears, manual transmission, and 285/70/17 GY DTs fyi.
05-28-2012 11:17 AM
JIMBOX Heh Heh, yeah joe and I'll tell ya, there's a phenominal difference in towing that trailer up hills----compared to when I had the 4.10 gears-


Quote:
Originally Posted by joe002 View Post
Jim- Yeah, when the Jeep is off-road and in 4 low thereís more than enough power and torque, and based on your gearing you can make it crawl really nice. Right, you ainít going fast in 4 Low.
It's really too bad so many new jeepers (pre 2012) don't realize the inherent power/torque in that little 3.8L---with just the right gears !!

My JKUR now weighs probably 600 lbs more than it did when I had the stock gears and she handles like a pup (yours)

The never ending story-

JIMBO
05-28-2012 11:13 AM
firehawk
2100 rpm

hi, most of the time i like to drive about 65 my jeep feels good at that
speed, however it turns about 1750 rpm at 70 mph, its a 2 door 2012jk,
with 3.21 rear and limited slip, l do get about 25-30 MPGS at 65mph, runs
much better that my 07jk with 3.73 rear that puppy got about 13 mpg.
both were auto with good year 24s factory m/s tires, i never look back,
i lookforward to the 2014 jeep with 6 speed auto and diesel which will get
30+ mpgs all the time. life is good
05-28-2012 11:10 AM
joe002 Jim- Yeah, when the Jeep is off-road and in 4 low thereís more than enough power and torque, and based on your gearing you can make it crawl really nice. Right, you ainít going fast in 4 Low.
05-28-2012 10:48 AM
JIMBOX Heh Heh, I kinda wondered about your question--

Mine does about 3900rpm in 4lo/1st gear/w unbelievable power/torque--as you know-

We just can't go very fast in 4lo !

JIMBO
05-28-2012 10:27 AM
joe002 It was a trick question - probably wonít be making any friends for it.

Iíve see the 0-60, MPG, 1/4 mile time, burnout, CAI, how does it look, etc. threads, and have been wondering are we discussing cars or Jeeps? I realize that some (many? most?) have their Jeep as a DD and some of the car type topics (on-road type topics) are important to them. However, it seems like many (most?) of the popular threads and responses here are car type topics (try clicking on Replies or Views threads and see whatís most popular), and with the 2012s it seems to be more so. Iím sure the trend will continue with the 2013s and beyond. On a Jeep forum, why is the first reaction of many to think of the ďcar-nessĒ of the Jeep instead of the ďJeep-nessĒ?

I wonder, if I posted this question years ago or on a CJ/YJ/TJ forum would I have gotten a different response? Ever seen a JK thread here where people were comparing how well their Jeeps could crawl (FYI - itís pretty good at it).

I thought of this topic last month when I was out wheeling and crawling up a rocky hill thatís now probably burnt up (lookup Gladiator Fire near Crown King), and took a picture of my dash - in 4 Low and 1st itís about 3 MPH at 2,100 RPM:
05-28-2012 08:38 AM
SeaComms Try this one, I put it together when fiddling one night to see the difference changing diffs would make. It sort of grew from there.

http://seacomms.com.au/files/Diff%20Ratios%20V1.2.xls

Sample of data
05-27-2012 07:01 PM
WatchThis!
Quote:
Originally Posted by JIMBOX
I'm doing about 55 mph in O/D-

JIMBO
I hear yah JimBo!! Im right at 50 in 6'th gear.
05-27-2012 06:39 PM
JIMBOX I'm doing about 55 mph in O/D-

JIMBO
05-27-2012 06:27 PM
mattjopete At 2100 Im doing about 75 with 3.21s and a 6 speed
05-27-2012 05:05 PM
Osage Orange I normally try to keep it under 2000 rpm most of the time so I maintain over 20 mpg and avoid tickets, but I'll holla back when I get there!
05-27-2012 04:56 PM
Up Hill Bill Play with this:

Gear Ratio Calculator

Set the tranny pull-down menu to Dodge 42RLE, transfer case ratios to 1 and 4, axle ratio to 5.38, tire size to 34.8", and have fun....

My 2012 auto, 3.73, 32" stock tires, is doing about 65 MPH in 5th gear at 2100 RPM.

You should be going about 56 MPH at 2000 RPM according to the calculator... So, just under 60 MPH at about 2,100 RPM....
05-27-2012 04:50 PM
kjeeper10 Right now I'm doing 70 at that with 35's in 6th.
Between 2100-2200.

07 w/4.10's 6 speed.
05-27-2012 04:47 PM
joe002
2,100 RPM, what MPH?

I know there are a lot of differences in the automatic/manual, pre-2012/2012+, gears, etc. but I was wondering how fast are you going when your engine is at 2,100 RPM?

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