"RAM³" wrote in message
0...
"Ivan Vegvary" wrote in news:yPUaj.12$ML6.5@trndny04:

which makes me wonder, why
we use heavy gear oils for similar applications when not unitized with
an automatic tranny?

The '62 MG Midget that I once had used 30-wt. motor oil in its 4-speed
manual transmission.

For what it's worth, the late 40's Chrysler electro/vacuum shifted
transmission used 10 weight motor oil to lubricate conventional gears.

Don Young