I know... Anytime someone has a 42RLE I always encourage them to go lower with the gears. The overdrive on these things is indeed outrageous.
Re-gear
- Thread starter Shwane
- Start date
I know... Anytime someone has a 42RLE I always encourage them to go lower with the gears. The overdrive on these things is indeed outrageous.
Nobody recommended 4.88 that I saw. The recommendation, which is a common and well used combination, was 4.56. If 4.10 is too low for you, so be it. But saying "screw what you read here," is a bit over the top.
And yes, I read the next post. 4.10 works for him, great. There is a difference between the 5 and 6 spds, however.
Nothing personal taken.
And yes, I read the next post. 4.10 works for him, great. There is a difference between the 5 and 6 spds, however.
Nothing personal taken.
Jeep put 4.10 in the Rubicon with 31,s, and factories tend to be very conservative. You need 4.56. Gearing is one of those things where crappy, ok, and perfect all cost the same,so do not go with 4.10,s
IamBR549
TJ Enthusiast
IamBR549
TJ Enthusiast
Not being able to use every gear and/or constantly downshifting is a good indicator your gearing is too tall.
Right now I am running 31x10.5 and 3:73 in my TJ. The only complaint I have is the pickup from 2nd to 3rd is not awesome. but it isn't ridiculous either. It is stock gearing with barely over sized tires, and it goes OK. It is not a 69 Camaro, but it drives and shifts normally. I can use 5th on the freeway. I am assuming that the type of driving I do I could even go 33's, and will be fine with 3:73 since that is what some J/ks come stock with, but if it were me, and I am set on getting 33's I would put them on first, and drive it around, and worry about gearing later. I mean if you are fine with it, then you are good, but if you need to re-gear you were going to anyway. Plus driving it around as is for a while may help you decide what gears are for you, so you don't have to re-gear more than once.
The tone here is everybody telling you what they did and what works for them. Find out what works for you before you are 2K in the hole.
It's hard to compare the JK with a 3.73 to the TJ. Different transmissions and engines will make a big difference and if you just keep going up in tire size and never re-gear then you never know what you are missing out on. I would say find someone that is running same motor, trans and the tire size you want and the 4.56 gear. Drive it and see what it feels like. Then that will give you a much better idea.
Now that is the way to end a conversation on what gear ratio you should run.
IamBR549
TJ Enthusiast
While I like your other ideas, this one is just wrong.
Truth be told, if you want to do your Jeep right and revive the factory power band, change the differential ratios to reflect the modified tire size.
If you dont care about losing power then keep your differential geared incorrectly.
Until you drive a properly geared vehicle. I thought my cj7 was"ok" with 32,s and 3.08 gears, until I switched to 4.10. It was like Forest Gump,s leg braces coming off. Bigger tires and tall gears also stress the driveline a lot more. It's like constantly towing a trailer. If you have an automatic tranny, it will die sooner.
I hear what you're saying, and you're probably right. I just did all of my mods basically at once so I need to let the wallet stop smoking before I take a look at regearing
To this in perspective I would love to give you a before and after experience of my TJ. I have a 5 Speed 4.0 on 33's with 3.07's currently. Absolutely hate it, will not drive this thing on the interstate unless I have too. I have a shop installing 4.88 into my replacement axles. I will let you know my current experience:
Take all of this with a grain of salt, because this is my personal documented experience. I did not want to do gearing the same year I bought tires, but 3.07's got unbearable on my DD *very* quickly. I am picking up my axles next Wednesday and will update you once I get some drive time on them.
Edit: Also I am not reccomending 4.88, I just have full intention of going to 35’s in the future. Go with the reccomendation of 4.56s.
- When starting from a stop in first, the vehicle tries to bog & die. Its become a daily occurrence I don't think about it very much but driving other manual vehicles, its really annoying. This was not an issue on my smaller 30s.
- Interstate travel I am 100% between 3-4th gear depending on if its downhill I am in 4th and uphill I am in 3rd. The vehicle has a hard time traveling very long distances and gets VERY hot due to the fact my highway rpm range is 3-3.2k depending on if I am traveling 65 or 70 (Satellite Speed).
- I have not used 5th gear at all with the 3.07's, even with the 30's.
- The engine is working way too hard, my fuel economy has plummeted to a solid 8-11mpg highway. God knows what I am getting city.
- My AC stops working 1 hour into a road trip. I believe this to be a cause of the very high RPM's the engine is under load 100% of the time while traveling. My AC is brand new and is ungodly cold while at idle or driving around town. When the engine starts to get *very* hot, the AC stops blowing cold. JFFT.
Take all of this with a grain of salt, because this is my personal documented experience. I did not want to do gearing the same year I bought tires, but 3.07's got unbearable on my DD *very* quickly. I am picking up my axles next Wednesday and will update you once I get some drive time on them.
Edit: Also I am not reccomending 4.88, I just have full intention of going to 35’s in the future. Go with the reccomendation of 4.56s.
Well stated. I don't understand how people think that the gear ratio that comes with the stock 28" tires will work fine with 33's or larger. The fact that people do it and say it works fine only to add they no longer use one or two of the trans gears goes to show that the combo is not working. Like I've said before, people have a hard time dropping 1500 bucks on something they cannot show to their buddies like a new set of wheels, lift, stereo, etc.
Very true.....a lot of Jeeps out there are products of conspicuous spending. Whenever I run into other Jeepers, I always ask what gears they're running,and far too many don't know what I'm talking about.
I'm running a stock JK size tire, with 4.10 gearing and the 5 speed. Went from a 245/75r16 to a 255/75r17. It's about an 1.5" difference in diameter...and awfully close to what a "33" tire would measure. I honestly didn't notice much difference with the new tires. I still start in 2nd, most of the time, and 75 on the highway is running my engine around 2600 rpm. Works for me. What has really scared me about regearing is all the driving problems that have been discussed on this forum when guys go to to higher ranges.
32" tire isn't bad on 4.10. Would I recommend 4.10 if someone was going to re-gear, no, I would still say 4.56. The 4.56 would bump you up about 200 rpm and give you a bit more low end and crawling. With the 4:1 case the Rubi has, crawling should not be an issue
It is rare to have issues after a re-gear. I honestly cannot recall one time where someone returned with vibration issues. It is likely the combo of the short wheelbase TJ, lift, driveline angles, and lower gear ratio. Not the gear change in of itself.
