regen braking vibration grinding noise

[dandw2]

going down a steep hill, I let off the accelerator. I expected regenerative braking, but the car started vibrating and making a noise like gear grinding. It happened twice and didn't happen again, but it is concerning

Anyone else have had this experience? It was about 28F out, we had been driving 10 or 15 min. No snowflake on, but I think we had received a regen temp reduction message.

 

[jcanoe]

going down a steep hill, I let off the accelerator. I expected regenerative braking, but the car started vibrating and making a noise like gear grinding. It happened twice and didn't happen again, but it is concerning

Anyone else have had this experience? It was about 28F out, we had been driving 10 or 15 min. No snowflake on, but I think we had received a regen temp reduction message.

What were the road conditions? It could have been the traction control/stability control kicking in if the rear wheels started slipping during reduced regenerative braking.

 

[dandw2]

No, that wasnt it, clear out and blacktop, no snow ice or slush. I should have honked to save the dashcam video

 

[jcanoe]

No, that wasnt it, clear out and blacktop, no snow ice or slush. I should have honked to save the dashcam video

Tesla Dashcam videos have no audio.

 

[jcanoe]

This is a stretch but check your wheel lug nuts for proper tightening (129 ft lbs.)

 

[dandw2]

This is a stretch but check your wheel lug nuts for proper tightening (129 ft lbs.)

ok, I'll take a look at that. that's a very specific torque number.

 

[jcanoe]

ok, I'll take a look at that. that's a very specific torque number.

Yep. Tesla wheels and tyres

 

[Pianewman]

Vin 88xxx: To follow on jcanoe's post: ALL of my wheels from the factory were torqued at <70 ft. lbs. Not good.

 

[dandw2]

Vin 88xxx: To follow on jcanoe's post: ALL of my wheels from the factory were torqued at <70 ft. lbs. Not good.

I say....