|06-10-2014 01:30 PM|
I can still do stupid stuff with 35s and 3.21s so yea, there is no immediate need to regear. Will I in the future? Probably, but it's very driveable at the moment.
|06-10-2014 10:26 AM|
|06-09-2014 10:08 PM|
|05-14-2014 11:36 PM|
|JE01||2 dr, 2012 pentastar, 3.21 gears, 2.5" lift, front and rear metal bumpers with wired winch, Falken's 315/70r17 Wildpeak A/Ts, and FlashCal. I get 16 mpg on city and 18 on highway. It doesn't seem to bother me even when I use my trailer, but I do plan to upgrade my FlashCal to Flashpak.|
|08-25-2013 10:39 AM|
|08-25-2013 03:48 AM|
|sebbekk||Those with a manual tranny, watch your clutch! With 35" tires and 3.21 gears the clutch will wear and fail prematurely. Changing the gears when adding a supercharger is a good idea. Watch out for the Magnuson supercharger. It should become available for the 3.6L in 2014.|
|08-24-2013 09:38 PM|
|OrangegasmJKU||I know this is an old thread but I just want to say that the 3.6 is definitly capable of running 35"s with 3.21s. I just recently installed 315/75R16 GY Duratracs on my 12' 6spd and today I made a 600km highway trip over the semi hilly terrain of northern ontario! I averaged 11.2L/100km (21mpg) and the majority of the run I used 6th, yes I said it, 6th gear, even over upward slopes! It is possible. Keep it between 65-75mph and your safe, gear down to 5th when approaching bigger hills and 4th when over taking and you'll be fine. I found cruising at around 65 in 6th was around 1500rpm which is good for MPGs. I did all my distance and speed calculations using GPStracker. As for offroading, don't climb big rocks and on tricky trails, use 4Lo and bomb along in 2nd or 3rd. Just takes time to get used too but they are actually pretty decent IMHO. That said, 4.56s will be in my distant future and possibly RIPP supercharger When I recieve my diablosport tuner this week, I'll post any MPG or power change results, sry of the long post! Keep the 35s and 3.21 results coming for the 3.6, there's lots of people out looking for honest opinions from people who actually have them just like when I was searching 2 weeks ago. Keep on crawling!!!|
|06-12-2013 05:20 AM|
|OffRoadCam09||I have 35x12.50's with 1.5" lift, goin to 2.5" with 3.21's its still got plenty of power. Takes some time to get up to 25 mph but after that it rolls no problem. Also get 18 mpg with this setup|
|06-12-2013 04:22 AM|
If so that chart means little as that's garbage...
|01-22-2013 06:09 PM|
|bearman95||I have a 12 JKU auto with 2.5 lift and 35 tires. It has a 3:73 gearing and it pulls very easily, on and off road.|
|01-22-2013 06:02 PM|
Here are the charts by the way - make sure you look at the right one according to the engine you run (3.8L vs. 3.6L) and the tranny you have.
|01-21-2013 03:46 PM|
Have a 2013 Unlimited automatic with 3" lift, 35's on 18"XD's and a stock 3.21 gear. It is bearable as I have other vehicles to satisfy my torque fix.
Are there any proven negative mechanical effects over the long term with running a set-up like this?
|12-07-2012 12:42 AM|
They are not as bad as you might think. Just depends on what you are doing. Plenty of fun still to be had- it is still a Jeep.
Even though I'll be re-gearing.
|12-06-2012 11:58 PM|
|BeyondYourFrontDoor||I run a 6 speed JKU 09 Rubi with 4.10's... 2.5" lift and 35" Duratracs - what you are asking about. I find 4.10 to be a bit tall for my liking... defiantly requires a lot more use of low range for in the dirt... It's workable... not enjoyable. I can't imagine 3.21's being fun off road...|
|12-06-2012 10:39 PM|
Lol. Please keep that clean.
|12-06-2012 10:32 PM|
My 35's KM2'smeasure 33.5-33.75 new
Stock 30.50 40K
Default superchips settings are 1.1/4 less
I run 28 front 26 rear.
|12-06-2012 08:56 PM|
X2. Though it is not just KM2s. I went back and forth a ton (3.21 freak out) and I was surprised how many "35s" are not 35s. Check tire width too- the KM2s also run narrower. But they are 15 lbs. less per tire than the Toyo's I had originally bought. (And still pine over....)
Just for sh**s and giggles 'cuz its not a Prius- but if I get 15 MPG (auto) I am giddy. But Elvira is really packing on the lbs.
|12-06-2012 12:31 PM|
AEV tuned their suspension running KM2s at 28 psi on their rims, so it seemed like a good place to start. I've been very happy with the ride and the tires have worn evenly.
Here's a shot from a few weeks ago when I put the hard top back on:
|12-06-2012 10:36 AM|
|12-06-2012 10:25 AM|
|12-06-2012 07:14 AM|
|12-06-2012 06:53 AM|
I stopped calculating my mileage this summer because it wasn't changing, but I tend to get just shy of 16 on the highway (65 and above) and around town (stop & go, below 40), and close to 17 on two-lane roads where I'm going between 45 and 60.
That was with everything adjusted with the Procal, and using GasCubby on my iPhone to track and calculate my milage.
|12-05-2012 05:24 PM|
|12-05-2012 04:33 PM|
|cverstij||So, with 35s, 3.21 gearing, in a 2012 manual, what is the true mileage per gallon? Mine is showing 14 around town, but i know that isn't right. And how far off is my speedometer?|
|10-25-2012 12:22 PM|
|en480c4||Even before the tires, 6th was only used on relatively flat terrain. 75 was between 2,000 & 2,100 RPMs, which was enough to maintain speed, but I certainly couldn't accellerate or hold on any kind of grade.|
|10-25-2012 11:30 AM|
|10-25-2012 02:45 AM|
FWIW, I just installed 35" tires on my jeep. 3.6l 6mt 3.21 gearing, bone stock.
Tires measure 33.75" true diameter at 23 psi.
At 65, I get just above 1500rpm in sixth gear, and around 2000 in 5th.
The biggest difference i felt is with the braking. The car feels noticeably heavier.
On acceleration, I just have to add more gas
I was considering a regear before the winter, but put it off till next spring now that I know that it's completely drivable with the 3.21's, even on the highway.
All you gots to do is shift.
Car still feels like a dragster next to my dd (corolla)
|10-24-2012 11:10 PM|
My wife drives a 3.21 sitting on 35's everyday. I was all set to regear for her but she has talked me out of it. It's already been mentioned but the big difference between mine (3.73) and hers (3.21) is getting it rolling (once it is rolling there is little difference 2-5) and it might as well be a 5 speed as 6th is not really used unless rolling downhill for an extended period. I am able to use 6th in many situations in mine (w 3.73)
We've added a ton of weight to hers (bumpers, rails, hardtop, etc) with the 3.21 so it is about as bad as it can be and it is still everyday drivable in her opinion. I don't drive it often but when I do I don't find it super hateful. As long as your aren't drag racing it will get you down the road (both paved and otherwise).
Having said that I have found that even with the 3.73 gearing in mine I've had trouble getting it going in thick stuff off road in 4H at times. When I encounter that I just drop it to 4L to get myself unstuck and then back to 4H. I've not driven hers in that exact senerio but I'm sure it is that much more an issue.
|10-24-2012 09:30 PM|
|10-23-2012 08:58 PM|
|chim-chim7||You need more than just gears if you want to run 35's for any extended mileage.|
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