I changed my tires and height with a programming tool. Next day the same light came on. Dealer flashed it and It fixed. Im sure I did it correctly with Jscan but oh well. Fixed now.
Hello Jt-wrx, I have been following your thread, and I finally ordered my Clayton 3.5" overland Plus lift, Falcon SP2 3.3 Adjustable shocks through the Black Friday savings. I plan to run the Method 313 racing wheels (light weight at 23 lbs) with Good Year MT/R Kevlars 37 inch (72 lbs). Right now, I am still debating the gears - 4:88 or 5:13 for my setup with the manual trans. I live in the mountains/hills at 2K feet. I am leaning towards 5:13 to be safe. What do you think ? Could another 200 rpm or so help with this higher lift on the fwy (ie. overcoming air resistance) ?ya that's what happened to mine, dealership had to do it, 4wp didn't know what to do with that for me
as for an update, i've been running these 4.88's on 37's for quite awhile and i love it, right choice, it's super fun to drive, my mileage is going down because it's too much fun to drive and i'm ripping the gears quite a bit more with the music from the magnaflow street side exit and how much zip there is, i drive more like my little redneck sportscar...so ya, i fully endorse this set up
So far, so good. Towed 3200lbs and it required a fair amount of downshifting on hills. Driving around it’s barely acceptable in hills and MPGs have gone from 16 to 13.8 or so . Off road it’s fine - Rubi 4 to 1 transfer case is unphased by the tires. Some video of on road driving and initial mpg. good luck!.
Thanks, it's amazing how much variance there is in everyone's experience. On 35's right now, I am averaging 17-18 with mixed driving and get closer to 20 on straight highway at 65-70 mph...I will never be the guy doing 80 in a Jeep and in my experience I have no problem in 5th or 6th at 65-70 mph in most situations...I don't climb hills in 6th, but I guarantee that the ATs aren't climbing hills in 8th either. Towing, I'm around 14-16 depending on what my load is. My tires will be mounted next Saturday, lift won't be here for a couple more weeks. Re-gear maybe in March or April unless it is just awful, but I don't think I will go 4.88...I want close to stock highway RPMs and that puts me in 4.56 from what I can see. In 6th gear at 70 mph, I'm turning 2,000 RPMs (below the power curve I know, but so far I am comfortable with what I get).
I was not gettin my 17mpg stock. I leave my Jeep idling, drive for real short trips on back roads and gravel roads and I find my worse mileage is on the highway. I also have Ace rock rails, Ace steel bumper and Warn winch killing my mileage l. Best mileage I’ve ever gotten was no doors or top on all gravel roads for about 70 miles. Got 20mpg and average speed of 25mph. I’m thinking 4.88 or 5.13 gearing. I tow and haul and where I am is reasonably hilly. Sounds like you’ll be fine. Good luck.
I have Smittybilt XRC2 front bumper, 12,000 lb winch, MetalCloak fenders, custom built rear bumper with dual swing outs/tire carrier and a JCR full height bed rack (no tent mounted right now) so I’m as heavy if not heavier than you. Again, very interesting how different everyone’s experience is and how different driving styles may play into things. I’ve gotten 21 mpg on a tank, but never the 24+ that some Sport and Overland owners tout. I plan to re-gear but I don’t need or want 2500+ RPM on the highway in 6th gear. Might as well just drive in 5th if that was the case.
don't waste your time with 4.56, it'll be more like touching yourself vs actually being with a partner...good but not quite as good as it can be
I think it all depends on what chart you look at and I like my ride now on 35's. I don't actually have much complaint except in some hill climbs on the highway...I should mention that I am tuned too. Gibson exhaust and a Pulsar. The Pulsar doesn't add much in economy tune, but the tow tune and performance tune (91+ octane) are noticeable. I drive in economy most of the time and I appreciate the extra mpg's. I think the conversation about gears is almost the same as angry eyes grills (gross in my opinion) but to each their own. We all build our rigs for our tastes and needs. I have zero desire to run 2,500+ rpms on the highway. You essentially are losing your overdrive gear when you do that. As many have said, the 6 spd MT is essentially a 4 spd with 2 overdrives as the AT is a 6 spd with 2 overdrives. I should know by this coming weekend how bad the 37's are on the stock gears, but I'm gonna drive until I decide what I want to go with. 32,000 miles on my JTR already, I'm pretty comfortable with how it drives. I also almost never have anyone in the truck with me, so even on trips not going to worry about the weight of the family and I am debating deleting the rear seats with the Goose Gear setup (apparently the rear seats are pretty heavy).don't waste your time with 4.56, it'll be more like touching yourself vs actually being with a partner...good but not quite as good as it can be
seriously though, you've got pretty much got full crew of 5 big dudes already bolted onto your rig and more coming...you will want to be 4.88 at minimum with all that extra weight on board, this is why i brought it up, my rig is a sports car...but i added pretty much nothing and started with the lightest version going, if you're loaded up rubicon plus all that added weight, then adding people, the tent and even more gear? i rarely suggest 5.13's for 37's but i think for these trail built up overland crawlers the 5.13 makes more and more sense, i bet you'll be sitting 500-800 lbs heavier than i am, my rig is 5150 lbs full of gas without me in it, plain jane sport s with mopar lift and that factory 30 lb bumper, the overland running boards are about 10 lbs each and the tonneau cover maybe 20 lbs, i put a couple subs and amps under backseat but that's about it, go find a scale, fill up, and get across it...subtract your own weight and lets see where you shake out
also, 37's and 4.88's is very close to stock and remember going from 35's up to 37's is a good jump in drag and rolling mass, you'll feel that quite a bit, and this is where the 4.88's even the losses, now add all the weight you're adding....ya, it's between 4.88's and 5.13's, 4.56's don't enter the discussion anymore, this is expensive enough to do it right the first time
, goals achieved, she's a snorty little stump puller
