285s or 315s with 4:10 gears? - Page 2 - JeepForum.com
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 > JK Wrangler Technical Forum > 285s or 315s with 4:10 gears?

Jeep Wrangler Complete Gear Upgrade Kits with Installs andRIGID LED Light Blowout Sale - All Sizes, All Series, all USA Standard Chromoly Front Axle Shaft Kits with Dana 30 4

Unread 04-18-2014, 12:40 PM   #16
Registered User
2008 JK Wrangler 
Join Date: Sep 2013
Location: Phoenix, AZ
Posts: 339
Toyo's are some of the heaviest tires on the market. They are great and strong but heavy.

35's are too much for the 3.8L and 4.10. Optimal is 4.88 with a manual transmission and 5.13 on an automatic. Of course it there are no problems running 35's on stock gearing but since when is losing 6th or OD, losing MPG and losing crawl ok??

I will say this again, typically those that say it is fine, never driven a Jeep with 4.88 or 5.13.


ROCKR8R is offline   Reply With Quote Quick reply to this message
Unread 04-19-2014, 11:45 AM   #17
Registered User
2015 JK Wrangler 
Join Date: Jun 2009
Location: Olympia, WA
Posts: 967
I am sure mine will be fine when I upgrade to 35's here in the next month or two... I don't drive my Jeep for performance... It IS my DD but I expect the lack of performance on the freeway because Jeeps were not designed for the freeway... I've done 33's on a 2.5L YJ with 4.10's and while it was extremely sluggish, I accepted it for what it was. A lot of people say that a stock 3.8 with stock everything is slow. Mine is fairly quick... By no means like my Porsche but again, I expect and accept it. 4.10's on a 3.8 with 35's are doable for me...
Neo1130 is offline   Reply With Quote Quick reply to this message
Unread 04-20-2014, 09:52 AM   #18
Engr. & Mechanic
jmb6420's Avatar
2008 JK Wrangler 
Join Date: Apr 2011
Location: Tulsa, Ok
Posts: 560
I have an 08, manual tranny JK Rubi 4.10 with 285/70-17's. I think it is just fine, there are times when I wish I had regeared, but overall it works well. I wouldn't go any bigger without regearing. Especially if it was a JKU.
08 Rubicon Red Jeep Club #629

"You can't fix stupid" Ron White

ɹǝʌo ǝɯ dıןɟ 'sıɥʇ pɐǝɹ uɐɔ noʎ ɟı
jmb6420 is offline   Reply With Quote Quick reply to this message

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


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.