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Hi all! I haven't been on here in a while, since the start of the school year. However, I have been experimenting in the cold weather with my 1949 Power Wagon. It's actually very reliable ;). However, it seems that when the truck is cold (literally. Maybe below 64º F) my transmission (stock unsynchronized) really has a tough time switching gears. It is harder to move the shaft, and grinds more often. Of course, after getting it warmed up, it becomes good, but until then, it doesn't sound too good. I have checked the oil level; it is good. As for oil, i am using 80 weight.
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We have been running straight 40 weight Royal Purple synthetic for a while now in all the transmissions and transfer cases we rebuild. Units run cooler, significantly better shifting, especially in cold weather, and they typically run quieter also. This oil does not thicken when cold. 80-90 weight gear lube gets very thick when cold, does not flow well as a result, 80-90 oils these days are designed mainly for differential use. If you are already experiencing hard shifting at temps no lower than mid 60's, it will get much more difficult as temps fall lower in the dead of winter.Originally posted by chance9888 View Post -
Excellent, Charles. I will try to find time in the weekend to change the oil. Now that you say that, everything makes lots of sense. Especially not being able to double clutch well. I would imagine that the thick oil just almost immediately slows the gear dramaticallyComment
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