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A transmission in good shape will not clash and grind with oil in it.

I agree: Unless it is very cold, and you happen to be driving the car it is installed in.



I rebuild manual transmissions as a side hobby. Wear on the synchronizer collar and dog teeth comes from one thing: hard abusive shifting. No lubricant of any type will prevent that, changing your driving habits will.




Actually one more,driving with you hand resting on the shifter handle.