SM465 fluid - i used gear lube, maybe synthetic gear lube - what now

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AuroraGirl

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Sep 8, 2019
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Location
Northern Wisconsin
First Name
Taylor
Truck Year
1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
that is good to hear. I will still put the right fluid in, when I go to do my differentials, transfer case, and ill do the trans again.

To my understanding,
80w-90 in differentials
mineral oil GL-4 in transmission
10w-30 engine oil in transfer case?

If anyone has any input on the other fluids for other parts Id like to hear it. I primarily use 4wd for snow removal and dont use it nearly much in the warm, maybe should use a 5w or 0w for winter use in transfer? Im not an expert on transfer cases(should point out np205) but Im using the logic of viscosity at -20 or so Fahrenheit.
 
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