08 jku wont down shift in overdrive - JKowners.com : Jeep Wrangler JK Forum
 1Likes
  • 1 Post By ronjenx
 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 03-01-2018, 03:18 AM Thread Starter
Newbie
 
triplesixthejk's Avatar
 
Join Date: Feb 2018
Posts: 1
Feedback: 0 reviews
08 jku wont down shift in overdrive

I might be posting in the wrong place but... Has anyone had this issue? 3.8 5.38 gears 37s AEV procal. Drives like a stock jeep but it really hates any sort of hill in OD. Any feedback would be cool
triplesixthejk is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 03-01-2018, 04:32 AM
Wheeler
 
Gringo Loco's Avatar
 
Join Date: Jun 2017
Posts: 36
Feedback: 0 reviews

I have an '09 on 34s with 5.38s, AEV ProCal that seems to downshift fine...

'09 JK, Dynatrac ProRock 44, 5.38s, ARBs, NV 241OR transfer case, Yukon 1310/1350 driveshafts, JK8 brakes, Hydroboost booster, Evo sway bar disconnect, ect...
Gringo Loco is offline  
post #3 of 5 Old 03-01-2018, 05:35 AM
Super Moderator
 
j3ff3ry_j33p's Avatar
 
Join Date: Jul 2012
Location: Nashville
Posts: 5,768
Garage
Feedback: 1 reviews

37s 3.8l , 42RLE auto , 5.13 gearing = I know what OP contends with. If aproching hill , Off I turn the OD.
I manually shift the 11 ( no tap shift like 12 & newer) from 1,2,D then on flat straights , D+OD . Some hills even require downshifting into 2 . Done this for 90,000 plus miles. Tuners can sortof accommodate gear and shift points but not well enough to use it as an auto completely , fwiw.




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
j3ff3ry_j33p is offline  
Sponsored Links
Advertisement
 
post #4 of 5 Old 03-01-2018, 01:42 PM
Rock God
 
ronjenx's Avatar
 
Join Date: Aug 2010
Location: Maine
Posts: 1,872
Feedback: 0 reviews

I just hit the OD OFF button when approaching a hill that I think the computer will hold OD too long. Hit it again when near the top.
Been working great for 157,000 miles.

It's an automatic, but that doesn't mean you can't control it yourself when needed.
j3ff3ry_j33p likes this.

2008 Unlimited Rubicon Automatic

Last edited by ronjenx; 03-01-2018 at 01:44 PM.
ronjenx is offline  
post #5 of 5 Old 04-09-2018, 04:27 AM
Rock God
 
D94R's Avatar
 
Join Date: Jul 2012
Age: 34
Posts: 915
Feedback: 0 reviews

Superchips offers a tranny tuner add-on. It made a world of difference getting the tranny to downshift on hills. I had it tuned so any uphill load with slight throttle input would kick her down, but on level ground it took a bit more throttle to get it to downshift. It was still a bit of a compromise between these two situations but it was drastically better than stock.

2007 JKU Sahara........................... 2015 JKU Sahara
5.3/6l80E......................................2.5" Rock Krawler Expedition Stage-1
Teraflex 44 front, Stock 44 rear........35's
Bastard lift
Totaled; being rebuilt
D94R is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK 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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome