Unusual auto tranny response at steep angles?? - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 Old 10-21-2007, 06:13 AM Thread Starter
Granite Guru
 
Join Date: Oct 2007
Posts: 242
Feedback: 0 reviews
Unusual auto tranny response at steep angles??



While going up the ledge shown above at a relatively slow steady crawl my front end got light and lifted off the ground. I've been told my front tires were about 2' from the ground although it didn't feel that high. There are no pictures as everyone was running for cover as the general thought was I was going over.

The odd thing was that for those few seconds I had no tranny control. When I touched the gas to try to provide some throttle input the motor reved, but nothing happened. I had no forward or backward power from the tranny. Luckily the truck settled down on its own accord and as soon as everything was at reasonable angles (all wheels back on the rock face) I had control again.

My JK is a '07 Rubi with an auto. I have wheeled two other auto equipped vehicles (and several manuals) in similar terrain and never experienced any sensation like this.

My initial guess was that tranny fluid pickup was exposed and sucking air. Does that make sense? Or maybe since the JK is computer controlled, it was taking over? Thoughts?
Duke is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 10-21-2007, 06:44 AM
Gib
Rock God
 
Join Date: Oct 2007
Location: College Station, TX
Posts: 585
Feedback: 0 reviews

I'd bet your first guess was right on. I remember that TJ's had this problem with some of their automatic transmissions. The cure for it was a deeper pan and extended pickup. More fluid in general in order to alleviate the problem. You could try to put in an extra quart or so and see what happens.
Gib is offline  
post #3 of 6 Old 10-21-2007, 09:13 AM
gcg
Guest
 
Posts: n/a

I have no idea as to whether this makes any sense or not, but is it possible that some of the electronics in the ESP system sensed that you were near rollover and kicked in?
Sponsored Links
Advertisement
 
post #4 of 6 Old 10-21-2007, 09:56 AM
TrailDuty.com
 
PhilD's Avatar
 
Join Date: Sep 2007
Location: Texas
Posts: 5,205
Feedback: 5 reviews

Quote:
Originally Posted by gcg View Post
I have no idea as to whether this makes any sense or not, but is it possible that some of the electronics in the ESP system sensed that you were near rollover and kicked in?
Could be, but I don't think so, the vehicle came forward and then lost power, leaving the front wheels in the air as it almost jumped backwards. It looked like it just lost the tranny for a moment. I would have thought if it was the electronics it wouldn't have allowed the engine to rev like it.
PhilD is offline  
post #5 of 6 Old 10-22-2007, 05:44 AM
Gib
Rock God
 
Join Date: Oct 2007
Location: College Station, TX
Posts: 585
Feedback: 0 reviews

If you had it in low, the ESP wouldn't cut power anyway. I'm pretty sure you sucked air for a second. Put an extra quart or so of fluid in it then try that spot again.
Gib is offline  
post #6 of 6 Old 10-23-2007, 07:34 AM
Granite Guru
 
jdrogers's Avatar
 
Join Date: Oct 2007
Location: Scottsdale, AZ
Posts: 199
Feedback: 0 reviews

Quote:
Originally Posted by Gib View Post
I'd bet your first guess was right on. I remember that TJ's had this problem with some of their automatic transmissions. The cure for it was a deeper pan and extended pickup. More fluid in general in order to alleviate the problem. You could try to put in an extra quart or so and see what happens.
When the 42RLE first came out in the 2003 TJs there was a problem but it's been fixed with a redesigned pan/filter assembly.

It is NOT a good idea to overfill the transmission. This causes several issues (fluid foaming, etc.) and the service manual warns against doing it.
jdrogers 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