Where is the VSS?
Quote Originally Posted by Greg Badass View Post
Typically it will cause max line pressure during shifts and cause harsh shifts. There have been occasions where the VSS reluctor wheel has not been pressed on all the way and has caused the sensor to no pick up a very good signal causing it to throw codes.

It's tricky but you could check by taking out the VSS sensor and using a mirror to look and see if the reluctor wheel is fully seated onto the differentail.