overdrive off - Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-31-2013, 09:03 PM
Thread Starter
Join Date: Jan 2012
Location: Trion GA.
Posts: 22
tbaker is on a distinguished road
overdrive off

i just got my 2011 jeep wrangler unlimited 4 door with a 3.8 engine and 3.73 gears lifted with a 3.25 lift and i am running BFG KM2 35 12.50 17 tires. i have not regeared yet but does anyone drive there jeep around with the overdrive off and will it hurt and can you tell a difference. going to regear later on. i have the fuel ECO button off and i can tell a difference in how the engine runs seems to pull better.
tbaker is offline   Quote
Old 03-31-2013, 10:05 PM   #2
JeeperJake's Avatar
Join Date: Jul 2010
Posts: 3,540
JeeperJake is on a distinguished road
Switching the OD 'off' means you do not shift up into that last notch in the tranny. In my 3.73/auto dropping into/out of OD yields about 650-850 rpm difference at a given mph.

I'm cruising the highway at "65" at "1800 rpm in overdrive at a certain indicated eco/mpg. When I come to a grade that tends to lug the engine below a certain rpm, it shifts down.....after perhaps lugging down a bit, slowing down, loosing headway and dropping eco/mpg. If I'm towing it for sure happens sooner. If I push the o/d off button, I get a burst of increased rpm/hp/road speed doesn't decrease as it was.

All you're doing is running in a different rpm range. One squeezes out a little better mpg at a cost of shifting/wandering auto shifting.

On trips with lots of up/down grades, I find it useful to switch o/d off.

My 08JK doesn't have a separate eco button.

By dropping down into a more productive portion of the power band, you will sense a stronger pull.

I use mine as a sort of auxillary gear, sometimes for better pull, sometimes for better eco. They are designed to run in either mode.
get in--buckle up--hang on
"soothing agricultural implement/personal servant/Walter Mitty multidimensional access utility device conveniently travels on pavement when necessary and often keeps me warm/cool/dry/soothed as needed."
JeeperJake is offline   Quote

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

All times are GMT -5. The time now is 01:35 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 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
« Back

Enter your email address:

Delivered by FeedBurner