Quote Originally Posted by Audibot View Post
100k is too long between fluid changes (drain and fill). That'd be my first suspicion.

Also, why 01E vs 02X?
Been proven time and time again that 01E will take anything you can throw at it and ask for more, with cast iron housing it's proven, audi used the 016 which was the predecessor to the 01E in most if not all of their rally cars. Hell some later 016 transmissions could be modified and add a 6th gear making them a 01E.