I have used "Red Line" MTL (manual trans Lubricant) in my big Healey (BJ8)
with overdrive for 7+ years, however it costs dearly ($8.00 qt). It is made
for transmissions that take motor oil. It has the viscosity of motor oil,has
much better shear strength, much more temperature stability, and a better
friction factor to aid the syncros. It made a noticable difference in the
shifting of the car, especially before the trans warms up. I also used this
in my bugeye gearbox with good results( when a old stock sprite gearbox holds
up to racing that is good results). Chuck
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