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I agree - and anyone who thinks ATF will cause damage is nuts!





As a factory tech in the 80's I saw a number of 833's (In trucks of course) with excessive bearing wear which in my opinion was caused by the factory fill of ATF used at the time for better MPG.

The lightest fill I would use would be a 15W40 or other such lube but not ATF



If you take not of the picture I attached - The 4 speed ( 23 spline ) that I am basing my post on has towed a camper, with a family of 4 and bikes on the roof - it was beat on heavily it's entire life. It had brass syncro's and they were in excellent condition and did not need to be replaced.