NHTSA complaint #11732597

Owner complaint summary

While driving in traffic on a busy highway, I heard a loud clunk from the rear of the car and it instantly decelerated from 70+ miles per hour to 22 miles per hour, where it stayed and would not go faster. I had to get across 3 lanes of traffic to exit. Thereafter, the car would not move and had to be put on a flatbed to get to the Porsche dealer. Note that for 2 years prior the transmission had emitted a whine while in first gear. The dealership (Porsche Austin) said it was normal, but it is a known problem among owners, possibly related to the input shaft bearing. They did not fix it when the problem was first raised. The dealership has diagnosed it only as a transmission error, without providing further detail on what is actually wrong. I should be able to access my dash cam footage if helpful.