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Topic Review (Newest First)
05-23-2013 05:43 AM
yoopone
Quote:
Originally Posted by Jerry Bransford View Post
That depends on you & your uses... if your Jeep is really a 99% road vehicle with lots of highway use & not much real offroading, you might like 4.56 better with the 6-speed. If it has a higher percentage of offroad use than that, you would probably like 4.88 better.

The woman I know who hated the 4.88 gearing with her 6-speed and 35" tires didn't do much (if any) offroading.
Thank you. It is mostly on the trails and mud of the Upper Peninsula of Michigan. Not much highway driving, not a daily driver but driven off road a ton. Thanks for answering, I appreciate it.
05-22-2013 07:48 PM
Jerry Bransford
Quote:
Originally Posted by yoopone View Post
Would you change your mind if you had the 6 speed manual in the Rubicon? Or would the 4.88's still be the way to go?
That depends on you & your uses... if your Jeep is really a 99% road vehicle with lots of highway use & not much real offroading, you might like 4.56 better with the 6-speed. If it has a higher percentage of offroad use than that, you would probably like 4.88 better.

The woman I know who hated the 4.88 gearing with her 6-speed and 35" tires didn't do much (if any) offroading.
05-22-2013 03:50 PM
yoopone
Quote:
Originally Posted by Jerry Bransford View Post
4.88 is optimal for 35" tires, 4.0L engine, and the 5-speed transmission. I ran that combination for years and I couldn't have wished for a better gear ratio for both the highway and offroad use.
Would you change your mind if you had the 6 speed manual in the Rubicon? Or would the 4.88's still be the way to go?
05-19-2013 03:41 PM
evilmonkey454 30 on the front and 35 on the rear would love some 44's but I'll make these work for now. Maybe I'll change to something different in the future
05-19-2013 02:42 PM
Jerry Bransford
Quote:
Originally Posted by evilmonkey454 View Post
Wow thanks for the overwhelming response. Sorry I did not give you all the info it is a 5 speed manual transmission
4.88 is optimal for 35" tires, 4.0L engine, and the 5-speed transmission. I ran that combination for years and I couldn't have wished for a better gear ratio for both the highway and offroad use.
05-19-2013 02:39 PM
Big Cole The correct answer is 4.88 gears. 5.13s are not an option with your D30. Don't waste your time or money installing 4.56s
05-19-2013 02:10 PM
NC Bear awesome on the highway. In fact I only have to downshift to 4th on very steep grades. 99.9% of the time I am in 5th and can accelerate rapidly. There is only one grade on the interstate that I have to downshift on. It is on the way to my home county in the mountains (Old Fort grade going into Black Mtn) Going up the Saluda grade on I 26 I can stay in 5th, as well as Cowee Mtn in Jackson / Macon co.

Obviously this is in NC....your mileage may vary.

I am running alloy wheels and lighter TA / KO's and 33's.
05-19-2013 02:06 PM
amiller What rear end do you have? If its a Dana 35, I would look to make a swap for a stronger axle. With 35's and a five speed, I'd go for the 4.88.
05-19-2013 02:00 PM
evilmonkey454 NCBear how is that on the highway or do you just not use the highway that much?
05-19-2013 01:32 PM
evilmonkey454 More than likely I'll be staying with the 35's I really like the way they look. I was leaning toward the 4.56 because the would be a little more power then the 4.10s but a little more highway speed then the 4.88 gears. I found a chart that said the 4.10 would be best fuel the 4.56 would be close to factor and the 5.13 would be most power with 35 inch tires. However never said anything about engine or transmission. So that was the reason for the question thanks again for the quick response. I look forward to wheeling with my new toy.
05-19-2013 01:30 PM
NC Bear
Quote:
Originally Posted by evilmonkey454 View Post
Wow thanks for the overwhelming response. Sorry I did not give you all the info it is a 5 speed manual transmission

4.10-4.88 with 4.88 being optimum for heavy mud terrains and steel wheels.


Now, having said that, I have 4.10's and 33's and I am happy. I was told that I would still be ok if / when I went to 35's. If I do I will re re gear to 4.88.
05-19-2013 01:23 PM
evilmonkey454 Wow thanks for the overwhelming response. Sorry I did not give you all the info it is a 5 speed manual transmission
05-19-2013 11:19 AM
Rubi513
Quote:
Originally Posted by evilmonkey454 View Post
So I bought my first Jeep. It's a 98 Sahara with a 4.0 and 35inch super swampers and it has a blown rear end it has 3.07s now . I want to up the gearing but not sure where to go. I hear a lot of people talking about 5.13s but for some reason it seems a little to much , as I still want to be able to drive it down the highway with out blowing the motor. Right now I'm torn between 4.88s and 4.56s however I'm reading and being told 4.10s might be the way to go. Please help and I'm sorry for bring up the gearing thing again as I see it on plenty of posts.
Most people who run 5.13 gears have the 42rle transmission, which you will not have.
05-19-2013 10:29 AM
SpoiledRotten And are you going to stay with the 35s or maybe 33s in the future?
I have 33s and the 4.0 with manual 5 spd. I love the 4.56 gears in mine. They seem to be the perfect fit for my application.
05-19-2013 09:47 AM
Water Dog
Quote:
Originally Posted by Big Cole View Post
What transmission?
^^X2...Stick or auto?
05-19-2013 06:27 AM
Big Cole What transmission?
05-19-2013 05:52 AM
evilmonkey454
trying to my gearing right.Help

So I bought my first Jeep. It's a 98 Sahara with a 4.0 and 35inch super swampers and it has a blown rear end it has 3.07s now . I want to up the gearing but not sure where to go. I hear a lot of people talking about 5.13s but for some reason it seems a little to much , as I still want to be able to drive it down the highway with out blowing the motor. Right now I'm torn between 4.88s and 4.56s however I'm reading and being told 4.10s might be the way to go. Please help and I'm sorry for bring up the gearing thing again as I see it on plenty of posts.

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