hp loss

[Jim Davies]

On Sat, 13 Mar 1999, Gary Derian wrote:

> Of course a hypoid has more friction than a bevel gear but how much?
> Viscous drag from the lube also has a great influence and is greater with a
> hypoid.  I suspect the differences between hypoid and bevel are measurable
> but small.
> 
I SUSPECT the difference may be significant in some axle designs. I have a
GM graph that shows the drag advantage of variable displacement automatic
trans pumps. They are careful to show overall driveline drag to a RWD
vehicle with a hypoid gearset. The difference is relatively significant.
Of course, it would be nice to see some reliable data on hypoid gear
friction...