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DonR · 11-24-2009, 05:24 PM

1) ATF

ATF has a lot of detergents in it. These break down or get used up over time. If you don't regularly change it, this adds a whole lot of cleaning properties to your fluid. This can disolve & dislodge a lot of gunk from inside your transmission. This loose gunk can clog small orifices & passageways as well as clog the filter. This can starve parts or all of the transmission of fluid. Some of the gunk may have been artificially sealing gaskets & seals. With this removed it may leak more.

I hate the idea of knowing I have crappy fluids in the car but I don't know what the proper fix for the situation is. Hopefully someone here does.

2) If it's had synthetic from day one I would leave it in it. If it starts leaking, you can change it then.

11-24-2009, 05:24 PM	#3 (permalink)
DonR Master EcoModder Join Date: Mar 2009 Location: Northeast Ohio Posts: 269 The Wife's Hot Rod - '09 Pontiac G8 GT Last 3: 23.22 mpg (US) Big Outback - '13 Subaru Outback 2.5i Little Outback - '02 Subaru Impreza Outback Sport Thanks: 0 Thanked 16 Times in 16 Posts	1) ATF ATF has a lot of detergents in it. These break down or get used up over time. If you don't regularly change it, this adds a whole lot of cleaning properties to your fluid. This can disolve & dislodge a lot of gunk from inside your transmission. This loose gunk can clog small orifices & passageways as well as clog the filter. This can starve parts or all of the transmission of fluid. Some of the gunk may have been artificially sealing gaskets & seals. With this removed it may leak more. I hate the idea of knowing I have crappy fluids in the car but I don't know what the proper fix for the situation is. Hopefully someone here does. 2) If it's had synthetic from day one I would leave it in it. If it starts leaking, you can change it then.