I know TES-668 is a great fluid for Allison's, and I've seen it touted as great in other applications as a robust synthetic ATF. That said, since it's approval list (that I've seen) is only listing Allison's, is there something I'm missing? Does everyone treat it like a good multi-ATF?
I bought a 5 gal pail of TranSynd 668 to do my new-to-me 01 F250's trans (with new external filter setup, BTS valve body and bigger cooler), transfer case, and power steering, but after I bought it I was concerned it might not be okay for all three. Naturally I came to BITOG in search and found differing opinions, ranging from the 4R100 trans is picky, to the 4R100 trans doesn't care what fluid is in it.
First post, been lurking for years, but usually always find the answer without much effort.
I bought a 5 gal pail of TranSynd 668 to do my new-to-me 01 F250's trans (with new external filter setup, BTS valve body and bigger cooler), transfer case, and power steering, but after I bought it I was concerned it might not be okay for all three. Naturally I came to BITOG in search and found differing opinions, ranging from the 4R100 trans is picky, to the 4R100 trans doesn't care what fluid is in it.
First post, been lurking for years, but usually always find the answer without much effort.