It's too bad that there isin't the same degree of general knowledge of AT oils as there is for engine oil. What-ever performance and chemistry knowledge there is about AT oils seems to be firmly locked up inside the industry. It's not necessarily their fault because they need to know this stuff.
The chemistry and the ability to analyze motor oil and the understanding of specific components of motor oil and their interaction with specific engine parts and surfaces is widespread and has been for years. But for transmission oils, their chemistry, additives, the exact needs of this or that specific transmission, as discussed by armchair mechanics on web forums, is still mostly arm-waving as far as I'm concerned.
I have asked on Valvoline's website (chat with an agent) if Maxlife can substitute for ATF+4, and was told no. Beyond that, I would not know where to look to find out why ATF+4 is a different animal compared to dex-this or merc-that.
I'm an old MoPar guy, the only thing I'm interested in when it comes to AT fluid is what is best for a non-lockup 727 Torqueflite. As in what is the best AVAILABLE OIL TODAY to put in one, not what was spec'd 50 years ago. So I'll stick with ATF+4 because it is probably the most heat and shear-resistant oil that is available.
It would be nice if LSJ would take an interest in and do video's about ATF like he does with motor oil. Talk to experts, visit labs, etc.
The chemistry and the ability to analyze motor oil and the understanding of specific components of motor oil and their interaction with specific engine parts and surfaces is widespread and has been for years. But for transmission oils, their chemistry, additives, the exact needs of this or that specific transmission, as discussed by armchair mechanics on web forums, is still mostly arm-waving as far as I'm concerned.
I have asked on Valvoline's website (chat with an agent) if Maxlife can substitute for ATF+4, and was told no. Beyond that, I would not know where to look to find out why ATF+4 is a different animal compared to dex-this or merc-that.
I'm an old MoPar guy, the only thing I'm interested in when it comes to AT fluid is what is best for a non-lockup 727 Torqueflite. As in what is the best AVAILABLE OIL TODAY to put in one, not what was spec'd 50 years ago. So I'll stick with ATF+4 because it is probably the most heat and shear-resistant oil that is available.
It would be nice if LSJ would take an interest in and do video's about ATF like he does with motor oil. Talk to experts, visit labs, etc.