Gear swap in put. - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 10-09-2013, 12:10 PM   #1
Jeeper
 
YelloJ74's Avatar
 
Join Date: Jul 2013
Posts: 183
Gear swap in put.

Hey fellas, I am looking to get some input from you all. I am wanting to swap out my gears in the diffs. Currently I have 3.55, NP435 tranny, and NP205 TC. I am trying to decide between 4.10 and 4.56. I am running 33x14.5 STS's now. I am not sure if i will change to 35's the next time I need tires or stay with 33's. I have looked at gear ratio/rpm charts, but I would like to get some input from guys that have similar set ups. I drive my jeep on both road and off.

YelloJ74 is offline   Quote
Old 10-09-2013, 03:15 PM   #2
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,928
what engine

harleydragon is offline   Quote
Old 10-09-2013, 05:18 PM   #3
Jeeper
 
AZ WRANGLER's Avatar
 
Join Date: Apr 2010
Location: Phx, AZ
Posts: 288
I run 4.56 with 35's. a little less speed off the line but better mpg. At highway speed it is perfect.
AZ WRANGLER is offline   Quote
Old 10-09-2013, 05:42 PM   #4
Jeeper
 
Join Date: Oct 2013
Posts: 70
Im running the 435 tanny with 456, originally I was running 33" tires with the 5 speed, when i did the tranny swap I lost the highway, and went to 36" swampers. Now Im running 37's and its very comfortable on the highway.
DGcooper is offline   Quote
Old 10-09-2013, 06:45 PM   #5
Jeeper
 
YelloJ74's Avatar
 
Join Date: Jul 2013
Posts: 183
It has 4.0L. What speeds one the highway and rpm's?
YelloJ74 is offline   Quote
Old 10-09-2013, 06:59 PM   #6
Moderator

::WF Moderator::
 
harleydragon's Avatar
 
Join Date: Jul 2012
Location: south georgia
Posts: 3,928
I have a 4.0 with 3.55's pulling 33's..it accelerates good and has a hell of a road gear....I have another one with 4.56 gears and 37's which is a good match but I have a near 400 horse 350 pulling them
harleydragon is offline   Quote
Old 10-09-2013, 10:56 PM   #7
Jeeper
 
Join Date: Oct 2013
Posts: 70
Quote:
Originally Posted by YelloJ74 View Post
It has 4.0L. What speeds one the highway and rpm's?
im running about 25k @ 65 3k @ 80 I kept the rpm's around 28. It's kind of the sweet spot on my engine.
DGcooper is offline   Quote
Old 10-10-2013, 11:22 AM   #8
Jeeper
 
YelloJ74's Avatar
 
Join Date: Jul 2013
Posts: 183
Cool. That is what i am looking for. How about off road performance?

YelloJ74 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




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 11:56 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