Hard Downshift - JeepForum.com
LinkBack Thread Tools
post #1 of 3 Old Today, 10:27 AM Thread Starter
Registered User
2003 TJ Wrangler 
Join Date: Mar 2013
Location: Birminham
Posts: 23
Hard Downshift

I know this has probably been discussed before but i have a hard downshift at exactly 30MPH. This happened 10 years ago but i dont recall what it took to fix it. Ideas?..Thanks in advance....

GCJEEP1 is offline  
Sponsored Links
post #2 of 3 Old Today, 02:28 PM
Web Wheeler
mukluk's Avatar
2000 TJ Wrangler 
Join Date: Oct 2010
Location: Clyde
Posts: 5,437
Start with the easy stuff if you're unsure of a cause -- check the ATF level and condition, and use a scanner to see if any fault codes are present or pending.

2000 TJ SE
2005 LJ Rubicon
mukluk is offline  
post #3 of 3 Old Today, 04:33 PM
Registered User
AjRagno's Avatar
2005 LJ Wrangler 
Join Date: May 2002
Location: Minneapolis
Posts: 977
2003 was the first year of the 42RLE. At 30MPH this would be the 4-3 downshift with Overdrive ON. If Overdrive is OFF, the torque converter is unlocking in 3rd gear at this speed.

Do begin by checking the fluid level and condition. If the fluid and filter have not be changed in the past 30,000 miles, you're probably due.

Though you don't need to go here yet, if the fluid and filter are not the issue, your TJ uses a Transmission Control Module, and they are known to experience memory failure. Hard up and downshifting with the 42RLE is often associated with TCM ('03-'04)/PCM ('05-'06) memory failure. If the hard shift only occurs from cold start (typically parked overnight or longer), it's a TCM/PCM memory issue. If you experience constant hard shifts, there is a mechanical or hydraulic issue that the TCM/PCM can't compensate for.
AjRagno is offline  

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:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

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 Off
Pingbacks are On
Refbacks are On

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