Transmission Fluid Leaking problems of the 2004 BMW 525

The contact owns 2004 BMW 525i. The contact stated while driving 30 mph the transmission would not shift and when it did shift it lunged forward. The contact mentioned that the failure occurred several times before but he was unable to be duplicate it. The vehicle was taken to the dealer who diagnosed that the mechatronic sleeve was leaking transmission fluid and as a result it needed to be replaced. The manufacturer was made aware of the failure but did not offer any assistance since the vehicle was no longer under warranty. The vehicle was not repaired. The failure mileage was 20,000 and the current mileage was 120,000.