I have been recently having a whirring noise on regen braking on my 2015 Model S 85D. This noise only occurs when slowing down with regenerative braking and the noise disappears when braking or rolling in neutral or while accelerating/maintaining speed. Here is a link to a recording of the noise where I started at around 42 mph and let regen slow the car down to a slower speed. Recorder The whirring can be heard from around the rear right wheel from inside the cabin.
Some background:
I hit a pothole last week and noticed a light clunk in the suspension afterward. In looking up the issue, I found out many people had issues with the washers on the axle hubs so I removed, inspected, and retorqued them. Relevant: I suspect it is possible but unlikely I over torqued them as I was following the manual with a torque wrench, but later when removing them again for further inspection a notably larger torque was required to remove them. After around 20-30 miles I noticed the whirring noise mentioned before looking further in the suspension to diagnose both issues. I discovered the clunk was from a loose bushing on a control arm that I will be replacing tomorrow. It is possible that this noise comes from that, but it is hard to imagine such a noise only occurring on regenerative braking if that is the source.
Has anyone heard this noise before, only on regen braking, and if so, what was the resolution?
Some background:
I hit a pothole last week and noticed a light clunk in the suspension afterward. In looking up the issue, I found out many people had issues with the washers on the axle hubs so I removed, inspected, and retorqued them. Relevant: I suspect it is possible but unlikely I over torqued them as I was following the manual with a torque wrench, but later when removing them again for further inspection a notably larger torque was required to remove them. After around 20-30 miles I noticed the whirring noise mentioned before looking further in the suspension to diagnose both issues. I discovered the clunk was from a loose bushing on a control arm that I will be replacing tomorrow. It is possible that this noise comes from that, but it is hard to imagine such a noise only occurring on regenerative braking if that is the source.
Has anyone heard this noise before, only on regen braking, and if so, what was the resolution?