some years ago I heard/got some information there was two different ways to grind hypoid gear sets....one was stronger than the other....

the stronger one, (called a 'bull' cut?) makes natural noise and is not so easy to quiet down....trucks, drag racers, etc will not notice....of course..

but there is another cut that car makers use so it runs quiet without that whine....

IS THIS TRUE?? or an olde wives tale??

can you describe the production process in something less than a book??

thanx....

GENE

 

I believe this is true. Streight cut gears are stronger but noiser. This is why some rebuilders won't use Richmond gears on street cars. Just sleightly different angles of cut.

 

I've even seen that in engines. The L22 series I6 engines used a gear drive for the cam, 250s destined for cars got a fiber cam gear with angled teeth. 250s for trucks and 292s got a metal cam gear with the "straight" cut teeth.