Why use ATF fluid for Bearing Lubrication?
 

I have seen several posts that recommend using ATF fluid for lubricating certain bearings such as blower motors and coolant circulation motors. I myself have used ATF fluid for these tasks and have had great results. What is so unique or great about ATF fluid as opposed to using regular oil or perhaps another product for lubrication? I'm really curious. Are there other lubricants that can be used to lubricate bearings such as those above? Thanks!!!

atf fluid is basically regular oil, with alot of additives and detergants. It has a friciton modifyer in it so it probibally sticks better to the bearings. giving a longer lubration peroid.

Are we talking about open bearings or sealed bearings? Sealed bearings, at least in theory, are unable to accept lube from the outside to the rolling elements. If the rolling elements are getting lubed in a sealed bearing, then the seals are shot.

ATF and motor oil are good lubes for bearings. The problem is that they don't stay in place as long as grease can, so they have to be relubed every so often.

ATF for bearings.
I have used a "ice pick" to lift a part of the grease shield and dripped ATF into them, such as center support bearing, u-joints can be placed into a coffee can of oil and left for a few days to penetrate.

Oil creeps out and drys, it will creep in and lube. ATF for most all things AND in the gas tank too. 100-1 dilution.