5r55s learns bad habits, harsh shift, after rebuild - Ford Mustang Forums : Corral.net Mustang Forum
LinkBack Thread Tools Display Modes
post #1 of 3 Old 06-29-2019, 12:37 AM Thread Starter
Registered User
Trader Feedback: (0)
Join Date: Jan 2000
Location: Valrico, FL
Posts: 5
5r55s learns bad habits, harsh shift, after rebuild

Very strange problem with trans after a rebuild by trans shop. I later found out, they were not reputable. Can't take it back again, they won't work any more on it and we are in litigation.

Trans originally had overheating and blown OD gears. I think the shop took the good parts remaining, plus unknown parts, and built a good unit. Except, here is the problem:

Immediately after a ECM KAM (keep alive memory) clear, the trans shifts like butter. Runs very nicely. Everything works fine. However it proceeds to learn a harsh 2-3 shift, which seem to get worse. Throws no codes and has no other issues. After 300+ miles the 2-3 shift becomes quite harsh and unacceptable. Reset the ECM again, and this process is repeated.

Your thoughts are appreciated! Worried I need to completely replace this trans.

Dennis-87GT is offline  
Sponsored Links
post #2 of 3 Old 06-29-2019, 09:10 AM
Registered User
midnightlaundry's Avatar
Trader Feedback: (3)
Join Date: May 2004
Location: Westland, MI.
Posts: 2,132
They used that trans in the Explorers. There's a ton of info on the Explorer Forums.



midnightlaundry is offline  
post #3 of 3 Old 06-30-2019, 01:15 PM
Corral Elite Member
Saleen414's Avatar
Trader Feedback: (2)
Join Date: Feb 2012
Location: Levant, Maine
Posts: 2,265
There is a very specific procedure for the trans shift strategy to be learned. If that was not performed after the rebuild, then the trans will not shift correctly.

1989 Saleen 414 358cid SBF 2.8L Kenne Bell S/C
26 X 8.5 Hoosier
Best 1/4 mile time 8.623 @ 159.82 mph with a 1.34 60' (5.57 1/8th at 128)
Best 1/8 mile time 5.339 @ 133.46 mph with a 1.29 60'
08' Bullitt #4097 N/A 340ish RWHP <<<<<FOR SALE!
Saleen414 is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang 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:


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