- Joined
- Nov 29, 2021
- Messages
- 5,387
There's nothing like cutting a transmission filter open, and the smell of fresh ATF, on your hands and all, in the morning. Maybe the Subaru community will also like these..
There is a LOT of discussion about how the black Tokyo Roki Subaru external trans filter cans ("AT oil," or Automatic Transmission oil as per Subaru) differ from a regular engine oil filter. I believe the main cited difference is bypass pressure, and it has been said you are not supposed to use an engine oil filter in place of one. @SubieRubyRoo once provided me information about how an engine oil filter is fine, with some NAPA/NAPA Gold acceptable alternatives, and why.. in the absence of this info (I lost it,) or if he cares to provide it again?again?, I purchased another OE Tokyo Roki filter and saved the previous one for a cut-open.
Should be noted that I've only seen Tokyo Roki as OE Subaru filter. This transmission, 4EAT, has external in earlier years and eventually went back to internal for some unknown reason in later years.
Here's that filter. Probably around 7000 to 10,000 miles on it, ballpark guess. Not original trans, miles unknown.
Nice thick, heavy baseplate!
This is a well-made filter.
Shots of media..
@Trav Isn't the OE filter the higher bypass pressure? I dislike MrSubaru as a channel/presentation, would dissuade me from watching that.. thought the oil filter had lower bypass pressure or do I have that reversed. (I've never run an oil filter in place of a trans filter, FWIW. I've been given info that some think it is OK, i didnt act on that info.. I personally didn't trust it, however, always about learning something new, that's why phrasing it as I am.)
There is a LOT of discussion about how the black Tokyo Roki Subaru external trans filter cans ("AT oil," or Automatic Transmission oil as per Subaru) differ from a regular engine oil filter. I believe the main cited difference is bypass pressure, and it has been said you are not supposed to use an engine oil filter in place of one. @SubieRubyRoo once provided me information about how an engine oil filter is fine, with some NAPA/NAPA Gold acceptable alternatives, and why.. in the absence of this info (I lost it,) or if he cares to provide it again?again?, I purchased another OE Tokyo Roki filter and saved the previous one for a cut-open.
Should be noted that I've only seen Tokyo Roki as OE Subaru filter. This transmission, 4EAT, has external in earlier years and eventually went back to internal for some unknown reason in later years.
Here's that filter. Probably around 7000 to 10,000 miles on it, ballpark guess. Not original trans, miles unknown.
Nice thick, heavy baseplate!
This is a well-made filter.
Shots of media..
@Trav Isn't the OE filter the higher bypass pressure? I dislike MrSubaru as a channel/presentation, would dissuade me from watching that.. thought the oil filter had lower bypass pressure or do I have that reversed. (I've never run an oil filter in place of a trans filter, FWIW. I've been given info that some think it is OK, i didnt act on that info.. I personally didn't trust it, however, always about learning something new, that's why phrasing it as I am.)
Subaru transmission filter IS different
Subaru transmission ATF filter IS different -- it's not the same as the engine filter . . . and not only in the way it’s made. The way it works is different too. Some time ago I opened, examined, and tested several engine oil filters to see what differences there were. My main focus was on...
www.subaruoutback.org
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