rjrjs
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Intermediate
Joined: Dec 2010
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rjrjs
I am surprised at the extreme difference in viscosity of the two recomended oils for the zf s6-40 transmission. The GM oil has a viscosity of a 10w30 and the castrol has a viscosity of a 10w60.
I was in a hurry and put Mobil 1 10w30 in mine, but I am not sure if this was a good idea. Normally it seems to work fine, but in a couple instances of a hard high rpm fast first to second shift I have gotten an ugly crunch.
Any thoughts on using the Mobil 1 10w30?
I was in a hurry and put Mobil 1 10w30 in mine, but I am not sure if this was a good idea. Normally it seems to work fine, but in a couple instances of a hard high rpm fast first to second shift I have gotten an ugly crunch.
Any thoughts on using the Mobil 1 10w30?
Race Director
Joined: Nov 2003
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
I wouldn't use standard motor oil in a ZF (even though the Castrol is "motor oil". I know other's have used Mobil products in their ZF but I'm not sure about their motor oils.
Without the correct modifiers, it's possible to "compromise" sychro function. (Slicker fluids slow match-up and vica-versa.)
