OK to change ATF brands during drain-and-fill?
#1
Pit Crew
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Is it OK to convert to synthetic ATF four during drain and fill? I think there's about 8 total quarts in the system so after the first drain and fill there would be about half synthetic half Toyota T-IV.
#2
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Name the brand of synthetic and people who have done this can provide you feedback. Apparently there should not be a problem [I have stayed with Toyota type IV]
Salim
Salim
#3
Pole Position
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Yep, done that and no problem...I switched to MObil 1 synthetic tranny fluid...ran it another 86k miles before I sold vehicle...better shifting and fluid stayed in better condition...
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#8
Lexus Test Driver
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As song as the brand states that it can be an OEM replacement for Toyota Type-IV ATF then you should be ok. Just be careful of terms like Dexron-IV because that's not Toyota Type-IV. People on this board (including myself) have used Amsoil and Royal Purple with no issues.
#9
Lexus Test Driver
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Only use atf that specifically states it's for Toyota Type-IV... If it doesn't say that on the bottle (on the back side) then do not use it, it will kill your transmission. All transmissions are very sensitive to what fluid is used.
#10
Lexus Champion
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Here is what I used in my 01 RX; Castrol multi import vehicle fluid,Wolf`s Head universal fluid, and Mobil-1. All worked very well,and improved the shift from first to second gear. Amsoil made it worse.
#11
Pit Crew
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Agreed! I've replaced 4 quarts with Mobil1 and it's definitely shifting smoother. Wish I had done it earlier.
#14
Pit Crew
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