changing gears for larger tires

[the_chief]

I found out I have 2.72 gears. I'm not sure, but I think this sucks. I want to go to 33's. What are my options? I'm on 31's now, and they haven't slowed me much. Is 2.72 on 33's bad?

xj, 4 liter, 231, 35c rear, if it matters.

PS I searched this first, and didn't find much.

 

[bgcntry72]

I searched this first, and didn't find much.

MMMMMMMMKAY.......
Someone quiet the voices in my head.
I doubt that the gears in your rig are 2.72s.
If you have a stick, they are more likely 3.07.
If you have an auto, then 3.55 or 3.73.
If it is a 4 cylinder, you most likely have 4.10s.
Either of the above is no good for 33's.
With your auto, go to 4.56.
BTW...Search Button...for the love of Christ.

 

[the_chief]

brb, I'll take a pic just for you toughguy. While i'm out, search as I did, and show me all you've found on these gears. Why are so many so quick to bitch about search?

 

[the_chief]

MMMMMMMMKAY.......

If it is a 4 cylinder, you most likely have 4.10s.

for the love of christ, read the post before you start bitching and moaning.

 

[Jes]

Why are so many people quick to post gearing questions when this has been hashed out time and time again then bitch when someone politely askes them to do a search?!?

 

[the_chief]

Why are so many people quick to post gearing questions when this has been hashed out time and time again then bitch when someone politely askes them to do a search?!?

define politely? ie..for the love of christ?????????

 

[the_chief]

2.72, as previously stated.

 

[Bryan C.]

Hmmm. That looks like a transfer case ID tag. When you asked what gear ratio to change to I assumed, as I assume many here did, thought you were referring to the axle gear ratioo. So if you question was "what gears are available for 231 transferr cases?", we all would have told you the only other ratio available was 4 to 1. So if you are running stock axle gearing with 33's then lowering your t-case ratio will only provide minimal results based on the amount of money spent.

Please try to use the search button to help clarify your understanding of your problem so others can actually give you the response you were looking for instead of a bunch of grief about you not knowing what you are talking about. OK, does that make sence?

Bryan

 

[the_chief]

OK, does that make sence?

Bryan

Not sure,, but it does make sense. Thank you for your reasonable reply.

Next time, please use spell check.

 

[Bryan C.]

I'm not sure where your attitude is coming from, but you need to lose it quick. Nobody around here is trying to pick on you, just educating you about how to use the search function. BTW Fawk you and your spell check.


Here is the proper way to use the search function.

http://www.naxja.org/forum/showthread.php?t=26298&highlight=transfer+case+gears


http://www.naxja.org/forum/showthread.php?t=23578&highlight=transfer+case+gears


And just for kicks..please read the title of this thread

http://www.naxja.org/forum/showthread.php?t=20510&highlight=transfer+case+gears

 

[the_chief]

those links didn't do much for me. anyway, sorry, i just get tired of internet [expletive deleted]. I searched and couldn't find anything. I didn't realize the search nazi's were after me. big deal, you'll live right.

I do thank you for your input. (that is a tcase tag, I don't know what else to look for) my fault.

 

[Bryan C.]

Man, more attitude. So I ask myself why am I still trying to help this guy.

So what is your question anyway. Are you thinking of changing your axle gear ratios? Are you asking what you should change them to? I think BG put it right, 4.56 for 33's. And this subject has been brought up many times in the last few months. If you wish to rehash a subject that has already been talked to death, I would suggest going to JU. If you are looking for a real flame job for your ignorance, then I suggest pirate4x4. This site is tame compared to most around the net. The tech archives of this site are full of useful information that you can use without fear of flaming if you would just use the search function, like we all told you in the first place.

Nazi or not, that is the way we all feel. This is the internet, it isn't real life, grow a thicker skin and move on.

Bryan, search nazi wannabe

 

[Eagle]

2.72:1 is the low range gear ratio for the transfer case. Why would you look on the transfer case for the axle ratio? I saw your post on the OEM forum, and nobody suggested that you look on the transfer case for the axle ratio.

Matthew Currie basically spelled it out. If you have a 4.0L (6-cyl) in a 1988 Cherokee, if you have a 5-speed the axle ratio is 3.07, if you have an automatic the axle ratio is 3.55. Period.

If you have a 4-cyl, the ratio could be 3.73 or 4.10.

This question gets answered approximately once every week. If you couldn't find anything on this by searching, perhaps you need some coaching in how to search the Internet.

The folks here on try to be helpful, but it can be annoying when the same question comes up again and again and again and ... It also helps us to help you if you give us enough information about your vehicle to get in the ballpark -- such as what engine and transmission you have.

 

[RichP]

YOu can check the diff gears one of two ways, drop the cover and count the gears or put a chalk mark on the pinion, turn the wheel once and count how many times the pinion turns. Like said above the gears *normally* put in are 3:07's for manuals, 3:53 or 3:73's for autos and 4:10's for 4 cylinders. Now, a previous owner could have changed the ratio hoping for some kind of improved gas milage I guess and was probably a mite ticked that it did not help
If that is what happened it would be interesting to see if BOTH diffs were regeared....
4:10's are borderline for 33's if you do alot of offroading, that said I have been running 3:07's with LT235's for the past 6+ years on my 98 4.0L 5 speed. Thats going to change as I now have the full setup for my 8.25 rear and D30 front to go to 4:10's.
What might be easier if you are not good with gears might be to consider switching the axles out with some newer ones, a 8.25 rear is a step up from the D35 and you might get lucky and find a D44 off an MJ which might already be at 4:10. If you go bigger gears on the D30 front you will need a bigger carrier, 3:53's are the biggest that carrier will handle, maybe 3:73's but I'm not sure about that. You don't mention your year but if you have an older one with a vac disconnect front you could also get that replaced with a newer one that does not have that vac disconnect. Just some suggestions from someone who was and in some cases still confused about gearing setups... I just had an auburn installed my 8.25 last month and it's great. With the 4:10's and 30's it should get my RPM's into the correct powerband of around 2500rpm vs the 2000 it sits at now at hiway speed making 5th gear not very economical...

 

[RichP]

OEM board..

 

[bgcntry72]

those links didn't do much for me. anyway, sorry, i just get tired of internet [expletive deleted]. I searched and couldn't find anything. I didn't realize the search nazi's were after me. big deal, you'll live right.

I do thank you for your input. (that is a tcase tag, I don't know what else to look for) my fault.

:rattle:

 

[Cherokee91Red]

With you auto, go to 4.56.

Haha, alright. Seems like someone needs to take a nap. When bgcntry72 told you pretty much what you had and what you need, then why start goin off about stuff. Just say thanks. And by God I hope you don't plan on installing the gears yourself if you think you have 2.72 and aren't sure where they are.

 

[the_chief]

Man, more attitude. So I ask myself why am I still trying to help this guy.

When I made this post, i did mean to apologize, and My design was not to give you attitude. I'm sorry. I do applaud your effort from the beginning.

edit: I also admitted I was wrong about the gears, I am so thrilled with the knowledge I have gathered on this website, and my goal for today was to figure out what axles and gears I had, and what I needed to change for the bigger tires. So thank you to everyone.

by the way, who the hell doesn't need a nap?