[Mgs] Transmission Oil

[Michael MacLean]

I know all the manuals say to use 20w-50 motor oil for the transmission.  Most of those manuals were written back when Castrol GTX 20W-50 was formulated differently. Does the new lower ZDDP content make a difference in the transmission?  I have a regular 4-speed trans in my 69 GT.  The car is new to me and I would like to start from scratch with all the fluids in the car.  Probably not a good idea to even get into what engine oil to use.Mike MacLean
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