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I’m getting a transmission fluid leak repaired this weekend, and it made me think of a question:
If all your transmission fluid leaked out, and you were stuck in the middle of nowhere with no cell phone, but you had a case of motor oil in the trunk, could you pour motor oil into the transmission and drive the car?
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My nephew (who is an actual auto mechanic) had this to say:
Hypothetically, I think it would work, but I don’t know for how long. Transmission fluid has significantly lower viscosity than motor oil. I imagine this would result in slow operation of the transmission… shift points that are non-ideal, shifts taking longer than normal, components taking longer than normal to disengage, etc…
If it were a legit emergency I think I would give it a try, but at the same time I would expect to take a significant amount of life off the transmission.
Anyway, feel free to add your thoughts on the topic of emergency auto maintenance.

