going off road with 3.21's - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 30 Old 04-11-2011, 06:04 PM Thread Starter
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going off road with 3.21's

ok i got the tires on, did the lift, but cant afford the re-gear just yet. it drives pretty good on road right now but i know i need new gears for better on road performance. what about off road?

do i need to re gear for off road performance? id like to take it out soon so just wondering.
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post #2 of 30 Old 04-11-2011, 06:23 PM
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In a word, YES.

CAN you wheel with larger tires (35? you don't mention any sizes) with 3.21? YES. Would you want to? NO.

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post #3 of 30 Old 04-11-2011, 06:27 PM
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Only onw way to be sure, and that's to hit the trails and wheel the piss outta those 3.21 gears. Once you get a feel for how it compares to on road driving, you should be able to know whether or not new gears are needed.

You didnt specify, but I'm guessig auto trans? If so, look into a tranny cooler. It'll help.

If you have a manual, you can compensate for bigger tires with how you shift, but the auto has set shift points that sap your power when you go with begger tires.

What setup are you running?



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post #4 of 30 Old 04-11-2011, 06:32 PM
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I had 3.21 on factory 29 inch tires and wanted to sell the Heep, but re-geared (4.88's) lifted, and put on 35s and life was good again.

If you went any bigger than factory I would avoid any kind of trail ...just my two cents...good luck.

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post #5 of 30 Old 04-11-2011, 07:40 PM
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It can be done. Get out there and have fun. I've got 3.21 and put on rubicon tires and wheels. Goes just fine offroad. Now if your headed to a place called Moab or anyplace similar you may want to rethink that.

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post #6 of 30 Old 04-11-2011, 08:36 PM
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I ran my 35s with 3.21s till i could afford to regear and it was ok. I did some pretty crazy obstacles and that but it takes alot more effort. It can be done like others have said, but its not ideal. Now with my 5.13s my crawl is great.

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post #7 of 30 Old 04-11-2011, 08:56 PM
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You can do it man. There's nothing in the world that says you can't wheel with XX gears and XX size tires. Just don't expect to use 4-HI. Go out there and plan on crawling around all day and you'll have fun.

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post #8 of 30 Old 04-11-2011, 09:22 PM
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I had 3.21's and 35's and wheeled just fine. Not the best but it was a great learning experience if you think about it. You learn your limitations, you learn what lines work for you. So go for it.


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post #9 of 30 Old 04-11-2011, 09:26 PM
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You guys are scring the poor guy.
Thats what your transfer case is for.
Put it in 4-lo and go to town.
Don't mind these nancies.

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post #10 of 30 Old 04-11-2011, 09:36 PM
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Its got 4 wheel drive right?

Use it!

Find out how it works with your set up. No sense in asking, it won't hurt anything. You'll never know until you do it.

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post #11 of 30 Old 04-11-2011, 09:54 PM
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Quote:
Originally Posted by SONIC View Post
You guys are scaring the poor guy.
Thats what your transfer case is for.
Put it in 4-lo and go to town.
Don't mind these nancies.
Exactly. I have enjoyed going out with my open diffs, 3.73s, and 35s and following pretty much anyone around that I wanted to.

There's always a by-pass if you need to drive home and you don't have to hit the 5s if you aren't ready. Get out there and put that sucker in four wheel drive and get it stuck!

Take a step back sometimes and think about all the fun people had finding out what their vehicles could do before we had the internet for opinions.

Marcus


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post #12 of 30 Old 04-12-2011, 03:17 AM
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Agreed with the above.

Just get out there and have fun.

If you're asking the question you probably aren't going to be driving things which really need the lower gearing anyway as they'll look either impossible or shit scary.

And also as the others said - just use low range! Learn to use the engine stall/start techniques if on hills so you don't burn the clutch out.

She'll be right.

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now: RHD JK 2dr Rubicon 3.8 6spd
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post #13 of 30 Old 04-12-2011, 03:22 AM
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Nah, you don't NEED to regear.

An Atlas 6.0 and a Klune V Goliath will do just fine!

Hell, the Atlas 6.0 alone will get you down to almost where my Rubi on 5.13's is at...


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post #14 of 30 Old 04-12-2011, 04:36 AM
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I had em on mine when I first went out, hell still do. Nothing wrong with it. Give your Jeep some honor and go wheel it. She will love you for it 3.21's or not.

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post #15 of 30 Old 04-12-2011, 06:42 AM
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Wheeled ours with 35s and 3.21s for 6 months before I broke down and bought some gears. My friends gave me a hard time saying I was leadin them down trails at 55 mph. Its not ideal, but its fine for a baller on a budget

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post #16 of 30 Old 04-12-2011, 10:29 PM
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3.21's on 35's six speed right now, I just need to get down to KC and hit some trails, we have none here


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post #17 of 30 Old 04-13-2011, 06:37 AM
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I wheeled a lot with my 34s and 3.21s until I was able to afford regear and locker. It was hard to go slow enough on rocks but everything else was ok. The 4.88s I put in make the rock crawling much more enjoyable. I also dont have to keep stopping so I dont run into the back of rubicons, crawl ratio is much better.
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post #18 of 30 Old 04-13-2011, 08:01 PM
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X 50 or what ever with 3.21's There not ideal but there fine. No your not gonna rock 37's locked and run the hammers with your eyes closed but for 95% of wheeling there fine. I run them and its ok, I dont crawl rock gardens but what I have done and some stupid stuff I shouldn't have done on some forest trails they have gotten me in and out. Stock JK sport gearing and axles does just fine as long as your creative. Lift helps with your angles and over all clearance but basic ground clearance dont change without bigger tires. Not as important as you may think.
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post #19 of 30 Old 04-13-2011, 08:04 PM
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At least you have a stronger set of gears than the others lol.

You'll be fine. Did it in my 4 door

31 jeeps in... still have issues
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post #20 of 30 Old 04-13-2011, 08:28 PM
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You will be fine just be care full that if you do get in a tight spot you dont try to power out because you will break your axlels. With that big of a tire and the little motors we have the axle will give it up before anything thing else.

Will
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post #21 of 30 Old 04-13-2011, 08:29 PM
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Quote:
Originally Posted by RiverCityOffroad View Post
Exactly. I have enjoyed going out with my open diffs, 3.73s, and 35s and following pretty much anyone around that I wanted to.

There's always a by-pass if you need to drive home and you don't have to hit the 5s if you aren't ready. Get out there and put that sucker in four wheel drive and get it stuck!

Take a step back sometimes and think about all the fun people had finding out what their vehicles could do before we had the internet for opinions.

Marcus
word

2-door, locked, 5.13's, 37's.
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post #22 of 30 Old 04-13-2011, 08:32 PM
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Originally Posted by will_mp115 View Post
You will be fine just be care full that if you do get in a tight spot you dont try to power out because you will break your axlels. With that big of a tire and the little motors we have the axle will give it up before anything thing else.

Will
I can't wait for the JKO to merge over with PBB. This would be flame city.

2-door, locked, 5.13's, 37's.
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post #23 of 30 Old 04-14-2011, 06:20 AM
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I can't wait for the JKO to merge over with PBB. This would be flame city.
Lol being separated I already feel like we are in the special ed classroom

31 jeeps in... still have issues
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post #24 of 30 Old 04-14-2011, 06:31 AM
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I'm still with 3.21s rolling 35" KM2s and I wheel the piss outta my rig.

It takes a bit to get the feel of it but like others have said 4-lo is the way to go.


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post #25 of 30 Old 04-14-2011, 06:51 PM
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^Schubbie is right. Ours is a stickshift and in 4lo and 1st gear, it wasn't as slow as you might want but we made due.
I do recommend getting sleeves for your front axles if you decide to go bigger than 35" just so you can be sure to reinforce the axles (they don't say "big tires snap axles" for a nothin' ) But in reference to what someone wrote ^^ way up there, you'll do FINE with stock gears and 35s. Unless you do something really crazy, no axles will be damaged on your trek.
We just regeared to 4.88s and are currently throwing on some 37s. Let you know how it does. Keep us all posted on how you're wheeling trip goes.

Happiness is a tight Koozie...if you're from Texas you understand
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