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Old 07-14-2011, 03:20 PM
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75mph!!!!!!

Well my mechanic called me and told me to come get my jeep. He put 4.88's in the front and rear for me. On my way home I decided to take the interstate. Well....I freakin hit 75-80mph and had power in 5th gear.hahah I was dancing in my seat like a little school girl

Had to post this I'm way to excited

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Old 07-14-2011, 04:27 PM   #2
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haha!! wow i wish i could do that!

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Old 07-14-2011, 04:30 PM   #3
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That is awesome! what does 4.88's do? I'm a newbie. Haha!
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Old 07-14-2011, 04:55 PM   #4
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4.88 gears will make you engine not have to work so hard to turn larger tires. Gears will also affect your off road performance and gas mileage. I'm running 36's with 4.56 gears and 75 for me is pushing it. But I drive like an old man 65 mph and I get 19mpg highway.
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Old 07-14-2011, 05:10 PM   #5
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Old 07-14-2011, 05:53 PM
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Yea I'm runnin 33's on a 4 banger. Wish I could get away with 35's, but maybe after that 350 goes in haha. But on my way home I still wasn't used to goin that fast and came on a pretty good curve and bout crapped myself haha.. more speed +no sway bar + no trac bars=
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Old 07-14-2011, 06:25 PM   #7
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No trac bars you can get away with on a YJ no problem. No sway bar on the highway is asking for time in a pine box or a concrete cell.
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Old 07-14-2011, 07:33 PM   #8
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I don't run any bars under mine. I'm here and well to tell you it's fine on a yj.
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Old 07-14-2011, 07:36 PM   #9
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I'll be going with 33's here shortly on my 4 banger but I've got the 3 speed slushbox behind it. I was going to go for 4.11's but would it be worth it to just step up to the 4.88's? Or meet in the middle at 4.56's?
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Old 07-14-2011, 07:39 PM   #10
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No trac bars you can get away with on a YJ no problem. No sway bar on the highway is asking for time in a pine box or a concrete cell.
When my brother had a yj (which i got two years later) my brother and i threw a lift on it and for a couple of weeks we drove it with the sway bar discoed bc he was saving up for the longer jks disco's. Nothing scarier than bouncing half way into the other lane doing 60. You learn to look for every pot hole.
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Old 07-14-2011, 07:42 PM   #11
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No sway bar? Why would one do that? Sorry for all the questions.
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Old 07-14-2011, 07:44 PM   #12
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No sway bar? Why would one do that? Sorry for all the questions.
You can drive it, for the most part it'll drive you where it wants.
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Old 07-14-2011, 07:47 PM
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I'll be going with 33's here shortly on my 4 banger but I've got the 3 speed slushbox behind it. I was going to go for 4.11's but would it be worth it to just step up to the 4.88's? Or meet in the middle at 4.56's?
I could be wrong but I believe the 4 cylinders came stock with 4.11's in the rear and 4.10's in the front. That's what came in mine and from my understanding they came stock like that to compensate for the lack of power. Also if you are going with 33's def recommend you go with the 4.88's.
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Old 07-14-2011, 07:52 PM
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No sway bar? Why would one do that? Sorry for all the questions.
Way better performance offroad. You get way better flex by removing the trac and sway bar. And so far I have not had any issues on the road. You just have to learn how she acts and handles after you take it off. With a leaf sprung vehicle there is no need for either. There are hundreds of write ups on here about swaybar and trac bar removal, and i think the over all concesus is to pull em off. I love it, and you can always get quick discos if you want it for on the road.
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Old 07-14-2011, 08:13 PM   #15
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I read that some lift kits require u to move a rear track bar. I bought mine with a lift. I haven't the slightest clue if it's there. Lol
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Old 07-14-2011, 08:23 PM   #16
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That is awesome! what does 4.88's do? I'm a newbie. Haha!
To make it simple, it means a 4.88:1 ratio. For every 4.88 turns of the driveshaft, the axle makes 1 revolution. The higher the ratio, the less the engine has to work and the more torque makes it to the ground, but at the expense of top speed.
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Old 07-15-2011, 06:41 AM   #17
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Yeah, 4.88s just rock with a 4 cyl and 33s. I give up at 70mph, don't want to go faster than that!
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Old 07-15-2011, 07:48 AM   #18
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Oh ok. I have an I6 with 31s. So my gearing should be ok... Right?
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Old 07-15-2011, 07:26 PM   #19
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I could be wrong but I believe the 4 cylinders came stock with 4.11's in the rear and 4.10's in the front. That's what came in mine and from my understanding they came stock like that to compensate for the lack of power. Also if you are going with 33's def recommend you go with the 4.88's.
Correct 4:11 rear 4:10 front in my 94 .
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Old 07-16-2011, 12:33 AM   #20
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why 4:11 and 4:10?????????? That's just completely and utterly dumb.

BTW I hit 92 with mine the other day. Somehow i'm still in 2011...
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Old 07-16-2011, 12:00 PM
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why 4:11 and 4:10?????????? That's just completely and utterly dumb.

BTW I hit 92 with mine the other day. Somehow i'm still in 2011...
Haha I have no clue... And 92 that had to be a scary ride...
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Old 07-16-2011, 12:18 PM   #22
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Originally Posted by mrobison1 View Post
Well my mechanic called me and told me to come get my jeep. He put 4.88's in the front and rear for me. On my way home I decided to take the interstate. Well....I freakin hit 75-80mph and had power in 5th gear.hahah I was dancing in my seat like a little school girl

Had to post this I'm way to excited
Unless someone had you on radar, you probly weren't going that fast. When you regear your axles, you need change your speedometer gear or you will see a higher speed on your speedometer than you're actually going. Just like, if you put larger tires w/stock gears, you're actually going faster than the speedometer says.
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Old 07-16-2011, 02:01 PM   #23
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You can drive it, for the most part it'll drive you where it wants.

I drive mine without trac or sway bars everyday and have for quite a while. To me it drives more like a Jeep should. The road manners aren't quite as good, but I've never been in any situations that were dangerous. It will lean more in turns, but as long as your steering and suspension are tight, you shouldn't have too many issues. Removing them basically puts you to where the CJ's were, but you still have slightly wider springs to help with the body roll.

If you remove them, just be careful the first few times out until you get used to it. It will definitely handle differently.
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Old 07-16-2011, 08:07 PM   #24
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why 4:11 and 4:10?????????? That's just completely and utterly dumb.

BTW I hit 92 with mine the other day. Somehow i'm still in 2011...
Not sure dude,ask Jeep.....? because axels are completely stock in my 94 2.5 yj ,the rear diff tag states 4:11 and front tag states 4:10 .
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Old 07-16-2011, 08:55 PM   #25
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why 4:11 and 4:10?????????? That's just completely and utterly dumb.
Most 4wds are like that, the front is just a but higher geared than the rear. It helps keep you in a straight line in 4wd because the front is pulling the back. My old bronco had 3.06s in the front and 3.07s in the back.
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Old 07-16-2011, 09:01 PM
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Unless someone had you on radar, you probly weren't going that fast. When you regear your axles, you need change your speedometer gear or you will see a higher speed on your speedometer than you're actually going. Just like, if you put larger tires w/stock gears, you're actually going faster than the speedometer says.
I had my friend drive my truck behind me and I know the speedo is good on it because the GPS and Speedo say the same speed. Anyways he followed me and told me how fast I was going. My speedo was off by only a few mph.
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Old 07-16-2011, 10:15 PM   #27
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Most 4wds are like that, the front is just a but higher geared than the rear. It helps keep you in a straight line in 4wd because the front is pulling the back. My old bronco had 3.06s in the front and 3.07s in the back.
That doesn't even make sense. That's just going to eat up your tires. And what about the all time 4wd models?
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Old 07-17-2011, 10:01 AM   #28
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The difference between 4:10 and 4:11 isnt even noticeable and will not effect anything on your jeep or any others (Im sure Jeep /other manufacturers thought this through ) .Im sure if you decided to drive your jeep on a dry paved road for a long distance it wouldnt be healthy for the t-case and would be very stupid anyway.Driving on snow/ice covered roads ,mud,dirt, you have eneough slip under the wheels that everything would be normal .Google it,there are many forums discussing even other vehicles having different front to rear gear ratios from the factory Tyewilly is right ,in that it is for tracking of the vehicle when in 4wd .
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Old 07-17-2011, 10:50 AM   #29
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I got my JEEP up to 80 once and was getting faster, but I shut it down, back to 60. I want it to last me a long time. I have stock gearing but 30X9.50's, which are about as big as I can run with a 2.5 engine and still have enough power to do anything without regearing everything. I've heard some horror stories of high speed and big tires. Besides, my YJ wasn't intended to be for speed.
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Old 07-17-2011, 10:57 AM   #30
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Awesome. I got mine somewhere around 100mph before i left for germany. It was scary as i thought back on it....broken seatbelt lol.
I have 33's and 4.10 gears..usually hitting around 70 is my max but i had a nice long straightaway and no headwind so it got me there once i gained momentum.
I wanted to change gears again when i return stateside to my jeep. is 4.88 with 33's possibly 35's still pretty good on avg. on the highway? how would the gas be?

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