Lost all gears in my 2001 Boxster today...Help!

[Ozzy474]

Hello everyone, I've attempted on searching for an answer to the following question, but have had no luck. Here it goes...

I had just pulled away from a stop sign, hit around 20 mph in first gear then shifted to second. Instantly, I heard/felt a loud bang from the back of the car. I immediately pulled over, looked on the ground/didn't see any damage or anything hanging. It idles completely fine. I then tried to put it back into gear and nothing, all gears are gone from 1st-5th plus reverse. Anyone ever experience this problem or something similar?

Here's some background information. The car is a 2001 Boxster 5spd manual with the 2.7 liter engine. It has 82k miles on it. I've owned it since 60k, and it has never been raced or abused. At 65k I had a new air/oil separator and mass air flow sensor installed, at 80k I had a new clutch and rear main seal installed. All the work was done at Rennsport Porsche in Tulsa Oklahoma which is one of the better Porsche specialists in the area. Between the clutch job and today I have never had any problems with the car. It gave absolutely no warning and was driving perfectly just before the incident.

I would greatly appreciate any thoughts. Thank you!