Lighter wheels = any E.T reduction?

[Myron Piatek]

Originally Posted by FED 387

Gentlemen--- Car Craft Magazine had an article a while back whereby they tested different transmissions and the Horsepower required to turn a transmission. I do not know if these are totally stock trans or were modified in any way, I also do not know if theTorque Convertor was used in these tests. These are THEIR results:

Powerglide---18 HP
Turbo 350-----36 HP
Turbo 400-----44 HP
C-6--------------55-60 HP
C-4--------------28 HP
A904------------25 HP
727--------------45 HP

Somebody also had an interesting comparison of differential efficiency. I don't recall who, but do remember that a Dana 60 and GM 12 bolt were at the top while the Ford 9" was at the bottom. Mopar 8 3/4 was in between, but I don't remember what else was included.