I flushed my transmission with Amsoil Universal ATF at 99,000 miles and was planning to go to 150,000 miles and have it analyzed to make sure it was still safe to use. I replaced the filter at 104,700 miles because I didn't replace it when flushing it, and this made my transmission louder, but replacing the filter made it quiet again (both, Ford and Amsoil tech support thought this was an odd occurrence). Transmission shifts a lot better with the Amsoil, but after reading up on all the posts here about good results with Auto-RX in the transmission, I was thinking of using it.
Would adding the Auto-RX require me to do a complete flush after 1,000 miles, or is that just a guideline for dirty transmissions? Would it really be necessary to flush out all the fluid or could I leave it all in (ATF and Auto-RX) until 130,000 miles on the transmission (if need be I can change the filter after a few thousand miles)?
I saw a post regarding this same question with Mobil 1 ATF and it was suggested to leave it in until the next flush, so I figured it would be safe with the Amsoil ATF as well, but wanted everyone's input.
Would adding the Auto-RX require me to do a complete flush after 1,000 miles, or is that just a guideline for dirty transmissions? Would it really be necessary to flush out all the fluid or could I leave it all in (ATF and Auto-RX) until 130,000 miles on the transmission (if need be I can change the filter after a few thousand miles)?
I saw a post regarding this same question with Mobil 1 ATF and it was suggested to leave it in until the next flush, so I figured it would be safe with the Amsoil ATF as well, but wanted everyone's input.