Reply to "Pantera # 5357 - Rocky's 1973 L model"

bosswrenchMember

Chuck, GM started switching their std trannys to ATF (a 0-wt hydraulic oil, not a load-bearing lubricant) over 2 decades ago. I found it full to the brim in an '82 Z-28 4-speed that seized 2nd gear to the mainshaft at an event, even though the gear was submerged in ATF. Most of us suspect the switch was done to gain about 1 mpg in their gov't D.O.T. CAFE rating; too bad about your warranty claims.

Most savvy car owners immediately switched their boxes back to 80 wt gear lube with zero problems from the 'thicker' lube. A few of my autocross friends lost gearboxes in new Corvettes from lack of proper lubrication of the transmission gears.

5/1/163:49 PM

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