Rattling sound after downshifting
 

Yesterday, I downshifted to 4th on a cold transmission, using more force to shift then I should have. I was going around 70-75 mph. Not sure if I accidentally money shifted to 2nd. I didn't notice any overly loud rev sound or feel any wheel spin. Immediately on entering the turn, I applied throttle and heard a loud metallic rattling sound coming from the left air vent. The more throttle, the stronger the rattle. No sound at cruising throttle. Today, I tried again and was able to reproduce the rattle. Is this a sign of over rev?

I would think that if you had over revved the engine and it didn't like it ...... you would hear more than a rattle coming out of a vent.


humfrz

Went for a drive to try and reproduce it. Warmed up for 10 minutes and did a few full throttle pulls. Wasn't able to reproduce. Maybe some interior part got agitated in the cold.

Yes, that's it ....... the air direction vanes in the left vent just got pissed off because they were cold ...... then they were happy again when they got warmed up.

See there ....... the "fix" is to let the car warm up ..... before you go hot rodding around ..... :D


humfrz