I just put 35s on my jeep and figuring out what gear ratio to do. I was told 4.88 however it's a daily and was told by someone else you can't go highway speed with 4.88. So I was thinking 4.56 instead.
I have stock Dana 30 and Chrysler 8.25 rear
Auto trans
And a 6.5" lift

What ratio can I do and still be able to use as a daily driver.

Yeah 35s on a daily, I only drive in town mostly and barely go on the highway.

 

4.88's....you won't be disappointed. You can still do highway speeds. Just don't expect to go as fast as a Ferrari, LOL

There's a chart on this link that shows gear/tire selection rpm's. Check it out...
http://www.4x4offroads.com/gear-ratio-chart.html

 

For 35's I'd run 4.88's... Unless you like driving over 80 MPH+

 

Mine was a daily on 35s with 4.88s for a year no complaints took it on the highway a few times did 75 with ease. Also had 33s on it while my new tires were on back order drove fine put a lot of imports to shame.

 

D

 

Currently: 27/35x3.55=2.73:1
Regear:
27/35x4.88=3.76:1

The 4.88:1 will bring your Effective Gear Ratio to that of a 3.73:1 gearset. So your Xj will act on 35s as if it had stock size tires and 3.73:1 gearing. So go with the 4.88:1 [emoji106]

 

I run 35's and recently went from 3.55's to 4.88's. Love it

 

My daily has 33" Wrangler duratracs (so really 32.4") and 4.88s and I love it. I can do 80+ no problem.

 

I'm runnin 35's with 4.56 & am really pleased. Could use a bit more on the highway going up hills, but she'll run 65-70 with out a problem. Great around town.

Got some gas mileage back. I don't hardly fill up like I used to with stock gears & 33's.

 

If you go with a higher gear (4.56) you will have better top end/highway speeds. With a lower gearset (4.88) you will have better low end take off and torque. But either are better than the 3.55 gears.

 

2600 rpm @ 65 mph sucks. That's what I'm at with 4:88s and 35s. 4:56s were much more enjoyable on my old jeep as a daily driver on the highway.

 

"sucks" is subjective. my 4.56's with 35's was great around town and on the freeway. what sucks is that it was a total dog when hauling camping gear up the mountains. one side of the stick is always gonna end up short. I say go deeper

curse-ed automatic transmissions

 

I think it has a lot to do with the condition of your motor as well. My current DD is an 01 with a really strong running motor and with 33's and 3.55's it's barely noticeable over stock. My last XJ was BEAT and could barely hold OD on the highway with 31's.

 

probably. I like sticking with the older models. so I wouldn't doubt I'm missing a few HP

 

Basically what I understand by reading all of these is that 4.56 is better highway and 4.88 is better for mountains and inclines.

Majority of my daily is mountains and I probably go on the highway 5 times a year.
So either is better than stock but for my driving I would be looking at 4.88 and if I go on the highway with those I will be at a higher rpms then the 4.56 gears driving at say 80.
Right?