regearing?

Postby **Withidlehands** » Sun Mar 13, 2011 7:06 pm

Hey guys I am looking at regearing my 2005 tj 4cyl to 4.56(or should I look at different gears? I am going 33s and I have 31s right now) from the 3.73s that are on there. I would love to do this myself but with school and work times I dont really have time any more.

What shop is fair on pricing for this job? I dont want to take it to some hack.

Postby **TJDave** » Mon Mar 14, 2011 12:15 am

Are you sure it has 3.73's? My 04 6cyl came stock with 3.73's. I thought the 4 bangers came with 4.10's. :?:

Postby **OldGreen** » Mon Mar 14, 2011 7:23 am

We just happen to have a set of 4.88s that will fit in your rear end. . .

Postby **White trash** » Mon Mar 14, 2011 8:34 am

OldGreen wrote:We just happen to have a set of 4.88s that will fit in your rear end. . .

Ewwwwww.

Postby **OldGreen** » Mon Mar 14, 2011 9:42 am

White trash wrote:
OldGreen wrote:We just happen to have a set of 4.88s that will fit in your rear end. . .

Ewwwwww.

What? They'll go right in as long as you use plenty of 90W. Just make sure that the small end is installed first. :shock:

Postby **White trash** » Mon Mar 14, 2011 10:05 am

Postby **SPR** » Mon Mar 14, 2011 4:36 pm

I agree with Trash.... Eww :shock:

Postby **Lud** » Tue Mar 15, 2011 10:03 pm

Go with the 4.88's. Yours should have 4.10s from the factory with the 4cyl.

Postby **mattawajeep** » Tue Mar 15, 2011 10:47 pm

If you go with 4.88's I have some for the front assuming you have a Dana 30.

Postby **TJDave** » Wed Mar 16, 2011 3:29 pm

mattawajeep wrote:If you go with 4.88's I have some for the front assuming you have a Dana 30.

Would those be reverse cut 4.88's for a HP30 by any chance???????? :?:

Postby **White trash** » Wed Mar 16, 2011 4:11 pm

If you've already got 4.10's I wouldn't even consider spending the money to gear down to 4.88. $6-800 for a 8.4% gain... Just snag some smaller cheap street tires off of craigslist and leave the poor little diffs alone. 4.88's are weaker than 4.10's and you need all the strength you can get with that small stuff. :lol:

Postby **Withidlehands** » Wed Mar 16, 2011 4:22 pm

Nope guys I have the 2.4L 6spd with 3.73s
http://www.jeephorizons.com/tech/2005_tj_specs.html

It had the 27" street tires on it when I bought it, and I went to 31s and can feel the lose of power. The thing bogs alot when in much and hills.

Its this jeep btw.

Plus I might be driving this thing down to texas next month...

Postby **mattawajeep** » Wed Mar 16, 2011 6:02 pm

TJDave wrote:Would those be reverse cut 4.88's for a HP30 by any chance????????

Unfortunately no, they're for the standard low pinion.

White trash wrote:If you've already got 4.10's I wouldn't even consider spending the money to gear down to 4.88. $6-800 for a 8.4% gain... Just snag some smaller cheap street tires off of craigslist and leave the poor little diffs alone. 4.88's are weaker than 4.10's and you need all the strength you can get with that small stuff.

I don't think I've ever heard of people having problems with 4.88/4.56's in the diff. It's usually something else that breaks before the gears do.

Postby **White trash** » Wed Mar 16, 2011 8:05 pm

mattawajeep wrote:
White trash wrote:If you've already got 4.10's I wouldn't even consider spending the money to gear down to 4.88. $6-800 for a 8.4% gain... Just snag some smaller cheap street tires off of craigslist and leave the poor little diffs alone. 4.88's are weaker than 4.10's and you need all the strength you can get with that small stuff.

I don't think I've ever heard of people having problems with 4.88/4.56's in the diff. It's usually something else that breaks before the gears do.

Guess ya gotta start reading somewhere other than jeepsunlimited then... :lol:

Even guys in this club as easy as most of them are have had issues. You are just asking too much of a 7.5" ring gear when you start adding large tires.

Postby **Roman** » Wed Mar 16, 2011 8:35 pm

I would be leary of regearing the D35, but I think the 30 will be fine.

Trashy, who granades all these axles?

Postby **Withidlehands** » Wed Mar 16, 2011 9:53 pm

well honestly if money was no option I would just get an expo 8.8 axle with 4.56 gears front and rear using the factory LSD and a lunch box front, but I dont really want to try and find an axle or even worse get one from a jy (never had good experiences with them)

All of my offroad stuff is basically exploring and camping. Not a fan of rocks or mud really as this is my daily.

Postby **commando14** » Fri Mar 18, 2011 10:39 pm

I would go with 4.56's or 4.10's for 33"s. I recently put 31"s on the Grand Cherokee and went from 3.54's to 4.10's. It's geared a little lower than I thought it would be for dailing driving.

I've ran 4.88's with lockers and 35"s in the Comanche for over 10 years now with no problems. Have broke a couple front axles and axle joints in the D30 but no problems with the ring and pinion, and the D35 has held together without an issue. I've been waiting for the D35 to break so I can drop in one of those D60's that all the web wheelers say is a must, but it hasn't happened yet :lol:

. I must have one of the strongest D35's out there, or probably just been lucky.

Postby **White trash** » Fri Mar 18, 2011 11:31 pm

commando14 wrote:I must have one of the strongest D35's out there, or probably just been lucky.

Yup lucky... Remember Jose's 35? :mdr

I've seen a whole lot of 35's break it's just the nature of the beast. 7.56" of ring gear isn't a whole lot when it's in an exhaust pipe axle housing. :lol:

60's are severe overkill for the average PNW wheeler. A 44 is a good choice in probably 95% of applications.

Postby **Wrench** » Sat Mar 19, 2011 9:18 am

My '35 broke last summer.

Running 33's: It held for about ~20 passes in the mud/dirt drags dumping the clutch in 4low 3rd gear, 6000 rpm. Did it once in 2nd gear, and it broke off the line. Snapped the shaft just past the splines, and rotated the outer tube in the pumpkin.

Dont know if it means much, but the Motive Gear 4.88's seem to be holding together better than the 3.73's that were in there when I bought the XJ. I raced it for one weekend with those gears and came up missing a few ring gear teeth. That was when I still had 31's

Postby **Lud** » Sat Mar 19, 2011 7:54 pm

oops...that's right '05 was the first year with the new 6sp trans. I believe the 2.4L motor came out in '04. 3.73 makes sense.

Side note: That 2.4L is supposedly the same motor that was turbo charged for the Dodge Neon SRT. I've heard of people adding the turbo from a turbo'd PT cruiser or SRT Neon to that motor for the Wranglers for street use.... This guy has 37's and is getting 20-22mpg on the highway. More horses than the stock I-6. 220hp vs 190 and more torque 250ft lbs vs 235ft lbs and lighter.

http://www.jeepforum.com/forum/f9/turbocharged-2-4l-my-tj-333749/index7.html

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