Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum > Gear Ratio Causing Problems?

Join Wrangler Forum Today

Thread: Gear Ratio Causing Problems? Reply to Thread
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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 email 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.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
04-19-2010 09:25 AM
Ken Steele There are a lot of threads on here about gear ratios in relation to tire size. Do a search to dig back and see what everyone has to say. The good news is that no matter what ratio you decide to go with, it will be better than what you have right now. 4.10 - 4.56 would probably be best. As far as the oil pressure, it sounds like you have a bad sending unit on the engine. Easy to replace. Another possibility is a bad connection on the leads from the sending unit. Jeeps are known for this. Also easily fixed with lithium grease.
04-19-2010 09:17 AM
whitebuffalo 3.07s with an auto and 33s would def cause your lack of acceleration and horrible gas mileage. i'm not sure which autos there were that year so ill let someone else recommend which gear ratio would be ideal.

i would try replacing the oil pressure sensor first. the fact that it drops off instantly and then comes look there first.
04-19-2010 08:47 AM
Mrmikeypoo 80 psi?!?! wow
04-19-2010 04:59 AM
kpool your speedo is off with the 33'' tires, your actually going faster and further that what your speedometer is showing
04-19-2010 04:38 AM
Gear Ratio Causing Problems?

2000 Jeep Wrangler 4.0L I6, Auto.

I purchased a jeep for a steal about a month ago, and the previous owner had upgraded a lot of things on this jeep. Two of the many upgrades are 33" Tires, and a 4" lift. I have been getting terrible gas mileage, and have a hard time getting over 70MPH, god forbid I am on any incline. So, I slid under and took a gander at the gear ratio it had and it is 3.07. What gear ratio should I have with my Jeep, and these upgrades? Would the gear ratio be causing the very low MPG's, and trouble gaining speed?

Also, every so often my oil gauge will drop almost instantly from 80 to 0, and then slowly start going up, and then drop back to 0 again. After a little bit it will make it's way back to a steady 80. Any ideas?

Also, also, will I have any problems with this setup having the stock yoke and drive shaft?

My Jeep (Sorry for the bad pictures, will post better ones later.):

Posting Rules
You may post new threads
You may 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

All times are GMT -5. The time now is 01:20 AM.

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