Anybody run this fluid in the 4R100? Thoughts?
A three-litre dump and fill was performed a few months back with M1 ATF, but just curious as to anybody trying the Amsoil stuff in this tranny and their thoughts.
I have been running the AMSOIL ATF in our 2003 Navigator for the last year. I immediately noticed an improvement in shift quality and have been very pleased with performance. It also cured an odd "shudder" that would occur when the transmission would shift into overdrive at a particular speed and engine load.