Grinding noise in reverse

[Sedan]

Originally Posted by walt101786

it is normal...the way how the manual transmission are designed is that once u put into gears...it is made in helical gears, meaning it is curve and when gears are locked into each other it doesnt make any noise at all...as matter of fact it is very quiet...but for reverse gear...it is made in spurs gear...meaning it is made in straight gears and when we put it into reverse gear. the straight edges are engage and it will make that winding noise...to answer your concern...it is normal to make that sound when u put it in reverse...hope this help..and i am sure that some of us in here agrees to what im saying and some of us here also mentioned the same thing as well :D

Hi,

New to the forum. Have the same issue and if you listen to it carefully the noise can be heard when on the first gear at a higher rpm as well. I was told to replace gear oil by my mechanic but that did not take care of the sound.

Anyways, it seems like a normal thing inherent to the Yaris. (did not get the same issue in other cars I have driven).