Actually a Laycock overdrive is VERY similar to an automatic
transmission: Planetary gears, clutches, and hydraulic controls...
At 07:51 AM 8/31/00 -0400, you wrote:
>If you're willing to risk your transmission, you might want to experiment
>with Dextron III ATF. It's a very good lubricant. Manufacturers have
>realized that transmissions and even differentials do not need the heavy
>lubricants that have been used for decades. That's why there has been
>an industry wide transition to lighter gear lubes. Going lighter gives
>cleaner emissions, more performance and better gas mileage, and the
>transmission still lives. Many manufacturers now specify 10-30 motor
>oil or ATF for manual gearboxes. It's been a hot rod trick in the
>japanese car circles to switch older gearboxes to ATF for some time
>now. I personally haven't been willing to do it in my vehicles because
>ATF is so thin. My brain can acknowledge the wisdom of the switch,
>but my tummy gets butterflies at the notion.