Gearing?? - Page 2 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Gearing??

Rockridge 4WD IS Taking Zone Offroad Suspension Lift Kits ZONE 4.25" combo lift for TJ available at Rockridge4wG2 Disc Brake Conversion Kit for Jeep Wrangler YJ TJ LJ Ch

Reply
Unread 08-24-2011, 06:45 PM   #16
Tom95YJ
[] Eye'd Jeep Connoisseur
 
Tom95YJ's Avatar
1999 XJ Cherokee 
 
Join Date: Sep 2004
Location: Salt Lake City, Utah
Posts: 8,678
I had 4.88 gears and 33" tires on Both my TJ and YJ I was able to drive 75mph with no issues at all using 5th gear . 4.88's will not limit your top speed they will make up for the diference in tire height 4.88 & 33" tire is like the factory 4:10 gearing with a 28" tall tire. IMO 4.56' would be a waste of money since your only going down 1 ratio and it would still be undergeared

__________________
'89 YJ The Smurf Build Thread
'99 XJ Black Betty Build Thread
Tom95YJ is offline   Reply With Quote Quick reply to this message
Unread 08-24-2011, 09:49 PM   #17
Vin91
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2011
Location: Plant city, florida
Posts: 104
I have stock 4.10 s now an it like a slug lol
Vin91 is offline   Reply With Quote Quick reply to this message
Unread 08-24-2011, 09:51 PM   #18
Vin91
Registered User
1993 YJ Wrangler 
 
Join Date: Jan 2011
Location: Plant city, florida
Posts: 104
Quote:
Originally Posted by Tom95YJ
I had 4.88 gears and 33" tires on Both my TJ and YJ I was able to drive 75mph with no issues at all using 5th gear . 4.88's will not limit your top speed they will make up for the diference in tire height 4.88 & 33" tire is like the factory 4:10 gearing with a 28" tall tire. IMO 4.56' would be a waste of money since your only going down 1 ratio and it would still be undergeared
I'm going to be running 35s you don't think it's going to effect it much?
Vin91 is offline   Reply With Quote Quick reply to this message
Unread 08-24-2011, 09:58 PM   #19
TheNewbie
Registered User
1995 YJ Wrangler 
 
Join Date: Oct 2008
Location: Grand Jct, CO
Posts: 2,968
Quote:
Originally Posted by Vin91 View Post
I'm going to be running 35s you don't think it's going to effect it much?


You WILL notice a change in gas mileage when going from stock tires to 35's no matter the gearing. The gearing will help to get some of the power back. But you're turning a much heavier tire, so that in itself will effect mileage. 35's are heavy. Going from a 31" tire to a 33 will add a few pounds per tire, but going from a 33 to a 35 will add A LOT of weight. Even though it's only a couple inches taller the bigger tires are built much heavier and will take a lot more power to turn. The extra weight also helps break stuff once you get off road. That's why I chose to go with 33's.

And nobody has mentioned it yet, but you should also be aware that 35's on the D35 rear end is a setup for disaster unless you're mostly just doing street driving. And I wold never regear a D35. It's not worth the money.
__________________
1995 YJ 2.5 - 4 RC lift - 1" MML - 33's - flat fenders front - TJ flares rear -Raptor lined exterior - Herc'd interior - DIY front bumper & winch plate - 136 amp alternator mod - 4.0 TB swap

My build thread...
I've got a shotgun, a rifle and a four wheel drive...
TheNewbie is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 12:22 AM   #20
Cooter92YJ
Member
1992 YJ Wrangler 
 
Join Date: Aug 2008
Location: North Central Wa
Posts: 306
[
And nobody has mentioned it yet, but you should also be aware that 35's on the D35 rear end is a setup for disaster unless you're mostly just doing street driving. And I wold never regear a D35. It's not worth the money.[/QUOTE]

Nobody has mentioned it because he said in his first post he had the 8.8
Cooter92YJ is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 06:52 AM   #21
mrmark
Registered User
1994 YJ Wrangler 
 
Join Date: Apr 2011
Location: Orange Park, FL
Posts: 1,951
I have a 2.5 with a D35 and 4.88's and a detroit locker running 35's. I will tell you I have plenty of bottom end power (well I could use an extra 100 hp )

I have no problem getting up to 55 mph, however it is usually a struggle to get to 60 and I almost never see 65 (my speedo is off by 2 mph now so you would need to add that in)

My gas milage is about 12 mpg depending on how i drive it.

As for RPM I can get about 2100 -2300 in 5th gear, occasionally it'll rev up a bit higher on a good highway run but it's lost as soon as I hit a hill.

Now with that said, I read this forum daily, and I am not getting the milage and speed that everyone else seems to get (with similar setups) or they are just plain lying about their Jeep's performance to look like they have something special. I don't know which is the case but I am telling you exact facts about mine.
jeep-getting-air-may-2011.jpg   jeep-beach-6-11.jpg  
__________________
Wave as you pass me :D

The problems of owning 2 Jeeps ... I never know which one to work on or which YJ gets the next mod ...
mrmark is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 07:13 AM   #22
jrhdpaintball
Registered User
1995 YJ Wrangler 
 
Join Date: May 2011
Location: Bel Air, Maryland
Posts: 149
dont forget the 8.8 needs a slight modification to run 4.88s in it... you have you shave off some of the teeth in order to get c clip shaft back in
jrhdpaintball is online now   Reply With Quote Quick reply to this message
Unread 08-25-2011, 07:22 AM   #23
hrt4me
Registered User
1991 YJ Wrangler 
 
Join Date: Jun 2011
Location: Dallas, TX
Posts: 327
Quote:
Originally Posted by mrmark View Post
got any video of that?
hrt4me is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 09:18 AM   #24
Anticanman
Follow me
 
Anticanman's Avatar
1994 YJ Wrangler 
 
Join Date: Aug 2009
Location: Ripon, California
Posts: 19,250
Quote:
Originally Posted by jrhdpaintball View Post
dont forget the 8.8 needs a slight modification to run 4.88s in it... you have you shave off some of the teeth in order to get c clip shaft back in
Or eliminate the c clips.
__________________
Luck Favours The Prepared
[SIGPIC][/SIGPIC]
Anticanman is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 10:24 AM   #25
Andywear
Registered User
1991 YJ Wrangler 
 
Join Date: May 2011
Location: Tulsa, OK
Posts: 1,247
Quote:
Originally Posted by Vin91 View Post
Ok so i am looking to re-gear im running 35s with a 4 banger, i have d30 up front an 8.8 rear? Can i run 4.56?
Why did you put a (?) after 8.8 rear? Are you unsure you have a 8.8?
__________________
Used to have a good sig but Mod threated to ban me...


[I]Errrrrrr[/I], Will complain else where - &y
Andywear is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 11:13 AM   #26
timatoe
Registered User
1990 YJ Wrangler 
 
Join Date: Aug 2006
Location: Grass Valley California
Posts: 13,815
I run 4.88's with 35's and the 6 cylinder, I could easily have done 4.56's but don't think I'd do that with the 4, I would definitely do 4.88's.
__________________
Quote:
Originally Posted by George Orwell
We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.
timatoe is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 01:16 PM   #27
Anticanman
Follow me
 
Anticanman's Avatar
1994 YJ Wrangler 
 
Join Date: Aug 2009
Location: Ripon, California
Posts: 19,250
Quote:
Originally Posted by timatoe View Post
I run 4.88's with 35's and the 6 cylinder, I could easily have done 4.56's but don't think I'd do that with the 4, I would definitely do 4.88's.
And I run 4.10 with 35's and would strongly recommend going to 4.88 with two fewer cylinders than I have. It just depends on what you use the jeep for, Dana 44's hold 5.13 gears nicely...
__________________
Luck Favours The Prepared
[SIGPIC][/SIGPIC]
Anticanman is offline   Reply With Quote Quick reply to this message
Unread 08-25-2011, 10:03 PM   #28
mrmark
Registered User
1994 YJ Wrangler 
 
Join Date: Apr 2011
Location: Orange Park, FL
Posts: 1,951
Quote:
Originally Posted by hrt4me View Post
got any video of that?
Yes, the video is of me playing around, the jumping is in the end

__________________
Wave as you pass me :D

The problems of owning 2 Jeeps ... I never know which one to work on or which YJ gets the next mod ...
mrmark is offline   Reply With Quote Quick reply to this message
Unread 08-26-2011, 11:42 AM   #29
xaran
Registered User
1995 YJ Wrangler 
 
Join Date: Jun 2007
Location: Antelope Valley, California
Posts: 222
Go with the 4:88.

Im running 11.5-32-15 MTs with a 4cyl and 4:88. It now drives like it did with the stock tires. I can pull 75 on most freewayss @ 3100 rpm, rarely have to downshift on a freeway / highway to hold speed at or above 65 mph. Gas milage is 14 -16 mpg.

It is still a slug and you need room to accelerate up to 65 + but its not terrible. Off road in low range with the 4:88 it has plenty of power.
__________________
Xaran
1995 YJ, 2.5 l, 4:88 R&P
4" RC Lift, 1" BL, 32-11.5-15 tires
8000 lb HF Winch
xaran is offline   Reply With Quote Quick reply to this message
Unread 08-26-2011, 12:53 PM   #30
Xpress
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2010
Location: The Great Big Box, California
Posts: 5,811
Quote:
Originally Posted by Vin91 View Post
Right now i top out at like 50 on a good day with 410s. Thats what me spedo says
You're doing closer to 70mph. To give you an idea, with 31" tires, you are off 1mph for every 10mph (so 10mph = 11mph, 20mph = 22mph, 60mph = 66mph) with the 4.10 gears.

So you are actually close to 70. If you want to be able to use ANY of that engines power, then go to 4.88 gears. It will put it close to the factory gearing ratio that was used with the factory tires. And don't think for a minute that it won't scoot around. I'm basically all back to factory tire size now, and I can move on the freeway at 70mph easily. That is actual MPH, not off MPH. If I want to, I can push to 75mph and keep it there. Going up long freeway inclines I need to downshift to 4th gear, but it can hold 68ish. With 4 people, 65ish.

Max speed is in the low 80's. I don't bother going there, because that's breaking the law.
__________________
[URL="http://www.jeepforum.com/forum/f12/another-5-2l-yj-thread-1503048/"]My 5.2L Build thread[/URL]

-1989 Jeep Wrangler 2.5L, soon to be 5.2L
-1996 Jeep Grand Cherokar 5.2L, donor and rainy day driver
-2004 Kawasaki KLR650 sunny day driver
[QUOTE=mudsweatNgearz;21162729]Leave em off and weld an I beam on. Bumperetts just scream homo.[/QUOTE]
"A well regulated Militia, being necessary to the security of a free State, the [B][I]RIGHT[/I][/B] of the people to keep and bear Arms, [B][I]SHALL NOT BE INFRINGED[/I][/B]."
Xpress is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.