Yes another regear question but a good one - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-27-2011, 08:22 PM   #1
Jeeper
 
Join Date: Nov 2008
Posts: 878
Yes another regear question but a good one

I'm about to regear from 3:07 to 4:11
I'm running no larger than 31's for awhile 98 sport 4.0 5speed
Would there be a big diffrence from 4:11 to 4:56? Is 4:56 to tall for 31's
I'd like the jeep to feel stock again,mild trail riding never any rock crawling.90% highway
I'm doing the work myself and I'm pricing parts to buy next week
Has anyone heard of Motive Gear? They offer a one year warranty and they have low prices

__________________
Pincho De Lapiz
ou812 is offline   Quote
Old 03-27-2011, 08:27 PM   #2
Jeeper
 
gth-wrangler97's Avatar
 
Join Date: Jan 2010
Location: boone, nc
Posts: 177
There is not a huge difference between a 4:11 and a 4:56. If your just running 31's and plan to stick with them then I would not go with the 4:56 gears. That would be to tall for highway driving as you would be running extremely high RPM's.

gth-wrangler97 is offline   Quote
Old 03-27-2011, 09:30 PM   #3
Jeeper

WF Supporting Member
 
TexasT's Avatar
 
Join Date: Oct 2009
Location: Texas Hill Country
Posts: 754
X2.
Too tall.
__________________
1999 Sahara
D30 w/powertrax no-slip,D35 w/ultimate 35 upgrade OX locker,4.56 gears,Air on Board, Mile Marker Winch
Warn Lockout Hubs

FIVE GRANDCHILDREN!!!!
TexasT is offline   Quote
Old 03-28-2011, 12:27 AM   #4
Jeeper
 
Sherpa's Avatar
 
Join Date: Oct 2010
Location: Lehi, UT
Posts: 1,157
Quote:
Originally Posted by ou812 View Post
I'm about to regear from 3:07 to 4:11
I'm running no larger than 31's for awhile 98 sport 4.0 5speed
Would there be a big diffrence from 4:11 to 4:56? Is 4:56 to tall for 31's
I'd like the jeep to feel stock again,mild trail riding never any rock crawling.90% highway
Greetings from a fellow 98 Sport 4.0 5-speed owner!

Jeep built many, many 4.0L TJs with 30" tires and 3.73 gears, including mine. I currently run 31" MT/Rs with a budget boost. I have not regeared; eventually I will upgrade to 35" tires and I'll regear then. But for now, I get decent street performance and good fuel economy (17.5-18.0 typical average per tank) with this combo.

Because of that, I suggest you go for 3.73 gears. The 4.56 gears will definitely be way too short for you intended use, and even 4.10s are a little too much in my opinion.
__________________
Dempsey Bowling
My fleet: 91 Miata, 98 Wrangler Sport, 01 Suburban 8.1L, 14 Impreza, 03 Protege
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
Sherpa is offline   Quote
Old 03-28-2011, 02:59 AM   #5
Jeeper
 
Black98's Avatar
 
Join Date: Nov 2010
Location: South East PA
Posts: 379
Why bother regearing if your only running 31s and do 90% highway, high cost of regearing for mild offroading combined with crappier gas mileage. I would only regear if you were going to the 32+range. I run 3.07s with 30s on my 98 4.0L manual sport. 3.07s should handle 31s fine unless your engine is due for a tune up or you run your tires at like 15psi.
Black98 is offline   Quote
Old 03-28-2011, 11:29 AM   #6
Jeeper
 
BigEZ's Avatar
 
Join Date: Sep 2010
Location: People's Republic of Illinois
Posts: 871
Images: 4
Quote:
Originally Posted by Black98 View Post
Why bother regearing if your only running 31s and do 90% highway, high cost of regearing for mild offroading combined with crappier gas mileage. I would only regear if you were going to the 32+range. I run 3.07s with 30s on my 98 4.0L manual sport. 3.07s should handle 31s fine unless your engine is due for a tune up or you run your tires at like 15psi.
why bother regearing w/ 31s? How bout b/c with 3.07s every time I hit a slight incline on the highway in 5th gear I lose speed...

also, the mpgs will actually increase marginally or at least stay the same; assuming you stay in the 3.73 - 4.10 range. 3400lbs is a lot to ask 3.07s to haul around on 31" and above tires.
__________________
Ride hard.
Shoot straight.
Tell the truth.
BigEZ is offline   Quote
Old 03-28-2011, 01:22 PM   #7
Jeeper
 
Join Date: Nov 2008
Posts: 878
I want to regear to gain my lost power and fuel mileage
maybe 3:73 might do it but whats wrong with adding the lil more power of 4:11

so anyone use Motive Gear?
__________________
Pincho De Lapiz
ou812 is offline   Quote
Old 03-28-2011, 01:36 PM   #8
Jeeper
 
Join Date: Nov 2008
Posts: 878
right now 1st gear isnt strong enough to ride thru mud slowly
1st is a bit too fast for my trails

I have to ride in 4l 2nd gear to equal what my 1st gear use to be,Id like to be able to run my 4h 1st again without burning my clutch and I dont like using low with wheelspeed

Stock 28's 1st high was perfect for my use
__________________
Pincho De Lapiz
ou812 is offline   Quote
Old 03-28-2011, 02:12 PM   #9
Jeeper
 
Sherpa's Avatar
 
Join Date: Oct 2010
Location: Lehi, UT
Posts: 1,157
Quote:
Originally Posted by ou812 View Post
I want to regear to gain my lost power and fuel mileage
maybe 3:73 might do it but whats wrong with adding the lil more power of 4:11
Nothing is wrong per se; it just isn't what you're after. You said it yourself:

Quote:
Originally Posted by ou812 View Post
Stock 28's 1st high was perfect for my use
Going from 28" tires to 31" tires is an increase of 10.7% (31 divided by 28). To return to this stock feel, you'd want to increase your axle ratio by the same amount. 3.07 + 10.7% = 3.40. This means even 3.73 gears will more than make up for the taller tires and will feel better than your stock Jeep did. If you go to 4.10s, you'll get even more pep off the line... and less highway fuel economy to match.

It's your call.
__________________
Dempsey Bowling
My fleet: 91 Miata, 98 Wrangler Sport, 01 Suburban 8.1L, 14 Impreza, 03 Protege
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
Sherpa is offline   Quote
Old 03-28-2011, 02:19 PM   #10
Jeeper
 
Join Date: Nov 2008
Posts: 878
well that gives me alot to think about and thankxz for the math.
Im hoping someone who has done this gear change can chime in with there thoughts

Quote:
Originally Posted by Sherpa View Post
Nothing is wrong per se; it just isn't what you're after. You said it yourself:



Going from 28" tires to 31" tires is an increase of 10.7% (31 divided by 28). To return to this stock feel, you'd want to increase your axle ratio by the same amount. 3.07 + 10.7% = 3.40. This means even 3.73 gears will more than make up for the taller tires and will feel better than your stock Jeep did. If you go to 4.10s, you'll get even more pep off the line... and less highway fuel economy to match.

It's your call.
__________________
Pincho De Lapiz
ou812 is offline   Quote
Old 03-28-2011, 04:52 PM   #11
Jeeper
 
Join Date: Apr 2008
Location: Mississippi Gulf Coast
Posts: 339
Send a message via AIM to CapnDean
I went from 3.07's to 4.88's Motive Gear. I had 31's with 3.07 and I had NOTHING in 5th gear unless I was going downhill. I went to 33's and 3.07's and I had negative nothing. Then I went to 4.88's and had HOLY COW I am a teenager again...burning rubber with my 33's, taking off in 2nd gear with no pedal etc etc.... So I went up to 35's and now I am golden EXCEPT...It sucks to go down the highway. I just can't bear to push this buggy to 3000 rpm just to keep up with traffic, it takes 2500 rpm to go 60 MPH. I wished I would have gone to 4.27's and kept my 33's Best of both worlds.
__________________


1999 TJ Sport 4.0L I6 5 spd Warn 8000
4" susp 1" body 35" AT's
4.88 Gears in Ford 8.8
Adv Adapter SYE
Adam's Driveshaft
CapnDean is offline   Quote
Old 03-28-2011, 05:47 PM   #12
Jeeper
 
jeepr's Avatar
 
Join Date: Jun 2010
Location: Littleton Colorado
Posts: 390
I agree with whats said above, down shifting when going up hills is just what happens when you drive a Jeep haha I would regear when going to 33+ inch tires, but for 31's not worth it... your rpms on the highway will be through the roof with 31's...... so in turn you will get worse gas milage if your on the highway alot.
jeepr is offline   Quote
Old 04-02-2011, 12:59 PM   #13
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,842
I run 31s with 3.07s and plan to move to 33s just hit the skinny pedal to the floor your fine. I will regear to 4.11 eventually.. but not for a few months

but seriously if you shift right and use your gas right, you should be fine. wranglers wont go up hill at 80 without losing speed. at least not often :P its expected.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote
Old 04-03-2011, 04:53 PM   #14
TDG
Newb
 
Join Date: Apr 2011
Posts: 10
I have an 04 which had 307s when to 33's no power!!! regeared to 411 and everything is wonderful. If you go to 488 that pinon gear gets mighty small and more likely to fail if you have 30 & 35 danas, I replaced them with Dana 44's much better.
TDG is offline   Quote
Old 04-03-2011, 04:57 PM   #15
Jeeper
 
Join Date: Jul 2010
Location: Gresham, OR
Posts: 271
Quote:
Originally Posted by gth-wrangler97 View Post
That would be to tall for highway driving as you would be running extremely high RPM's.
Too short, actually.

village idiot is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Good Lift Kits and Hard Tops? Trish TJ General Discussion Forum 7 10-18-2009 03:41 PM
Newbie question Christies3 YJ Tech Forum 2 06-09-2009 04:53 PM
Engine idle question. nagymjr TJ Tech Forum 9 05-15-2009 11:30 PM
new jeep owner.need good advice re: lift whoknows361 TJ General Discussion Forum 6 02-26-2009 08:17 PM
Too good to be true? fr87hn TJ General Discussion Forum 28 03-14-2007 02:03 PM



Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 05:47 PM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC