Diesel Forum - TheDieselStop.com - View Single Post - E40D Transmission Rebuild Question
View Single Post
post #2 of (permalink) Old 04-29-2014, 05:57 PM
Mark Kovalsky
Lifetime Supporting Member
Mark Kovalsky's Avatar
Join Date: May 1999
Location: SE Florida, USA
Posts: 11,617
My Photos: (6)
I predict that your problem is a cracked torque converter clutch apply piston. That allows pressure that should be holding the clutch to leak past the clutch. This allows the clutch to slip. Once the slip exceeds 50 RPM for a certain amount of time (I've forgotten the time) it sets a slip code, flashes the OD light, and sets the transmission pressure high to try and protect the slipping clutch.

When you disconnect the batteries the code is cleared and the trans shifts normal. Once it recognizes the slip it sets the pressure high and the shifts bang.

The solution is a new torque converter. While the trans is out adding a rebuild is not that much more money.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Automatic Transmission Engineer 1988-2007

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
Mark Kovalsky is offline  
For the best viewing experience please update your browser to Google Chrome