There not Grabbers just General AT2 tires don't have the money for grabbers just yet, but i was thinking on getting some 31s mud tires my friend has them on his cj7 and perform good and he said it's best since we live in Az but idk.

 

Well you do have to take this pic with a grain of salt. Massive tarz (i guess 35x15.50's and up count as massive in my book.. No matter what, it doesnt end with gears. anything above a 33 starts to risk other components. Its the very reason you cant alter a river too much art once; there will be a potentially adverse effect downriver..

 

I'm curious as to the reasoning behind wanting to stay below 3k.

 

Not sure about the OP, but for me above 3k just grates on my ears to hear it. But then I grew up with big block V8s and inline 6 Diesels where you normally never went above 3k. I probably don't break 2500 with the 4.9L in my F150, I shift 1,3,5 and hit fifth by the time I am at 35mph.

 

I figure there will be a little difference, but currently I am at 2500 at 55mph and over 3k before I hit 70mph. Sounds like the thing is going to blow up at 70, so I mostly only drive on two lane roads. In the XJ and in my F150 if I drive 70 on the interstate I lose several miles per gallon so I just don't drive on them

 

I routinely spend half a day at 3-5k but that's on sand. I guess it's what your used to. I love the sound of a well built engine pushing 7500 rpm.

 

Lower rpm equals better gas mileage. Plus I just Dont beat on any vehicle I've ever owned. The more you rev the **** out of your motor, theres more potential to break things. With my grabbers, I get 13 mpg on a good day and worse on the highway.

 

I've had 3 XJs that have been regeared:

'88 w/ 32s, manual and 4.10s
'99 w/ 31s, auto and 4.10s
'99 w/ 31s, auto and 4.56 (current)

There is NO way I would ever go lower than 4.56 after having them. I have a fairly light (for mod'd) vehicle & absolutely love the gearing. It is not screaming & I drive this thing all over the place. Perfect IMO.

 

Thanks everyone for all the comments!!!

What I gathered from the post is that it is more of a matter of preference about gearing. I am a little worried about not regearing though.... I don't want to lose out on mileage and power... but I don't want to pay the money to get someone to do it. I'm 21 and in college and the more I read up about lifting a vehicle the more I realize all the integral parts that go into the whole process. It isn't as simple as just throwing on a lift and tires. Not sure what I will do now.

 

Just save. When you know what you want, you'll have some fundage!

 

Your correct I did struggle with the 31's and then even more when I went with the 33's. What I noticed the most was high trans temps with both that a cooler would not cure. Then was the very poor fuel mileage and sluggishness on and off road.


I have all stock Chy 8.25 29 spline and D30 HP in mine with Detroit Lockers and I do run 35's on beadlocks now on some trails at 6-9 psi. I carry spare axles for the D30 & 8.25 but so far have not broken anything. I tend to pick my line carefully and go easy on the skinny peddle, I'm not ashamed to use the winch when needed lol. I do have new driveshaft's and pinions also installed.

 

Going from 3.55 to 3.73 is a waste of money. You don't want to have to do this job twice if you are paying someone else to do it so go bigger just in case. Bigger tires help reverse the rear end gear ratio the other way. What I mean by this is if you are running too high of RPMs at a certain speed you go, bigger tires will help lower that RPM at a certain speed you go.

If you have 31s and 4.10s and you usually travel at 80 mph, you are turning your XJ at about 2,678 RPMs. If you went up to 33s, it would lower your RPMs to 2,516 at 80 mph. If you went up to 35s, it would lower your RPMs to 2,372 at 80 mph.

Personally, I wouldn't go with anything but 4.10 or 4.56 depending on your tire size. 31s would call for 4.10s. 33s call for 4.10 or 4.56. 35s call for 4.56.

 

You drive a old jeep wich tells me you have already chosen to live with less mpg and efficiency.

Drive the damn thing with 3s and roll on. If you do regear dont let anyone talk you into 3.73 or 4.10s. Just do 4.56 and be done with it..

 

I could have sworn I replied to someone that posted recently. Did I really reply to a post from 2015? Oh boy...

 

booooooooo