[whataboutbob]

Originally Posted by AZP Installs

We suggest and change out our clients ATF at the 30k major service interval. Over the years we've had very very good luck running Redline High Temp Synthetic fluid in our cars. This includes an Automatic full-fledge Road Race car that saw 20-30k of track miles in a year with several 8 hour enduros.

Also anyone who is running an Automatic should be installing an external ATF cooler. Heat is the number 1 killer of automatic transmissions. We like the B&M ATF Coolers you can find from Summit Racing for <$75. Couple that with an ATF Temp Gauge and you will be doing yourself a very very important service.

For fluids either Redline High Temp ATF or the OEM ATF is what we suggest and definitely do a drain/fill every 30k miles. While that will not get all the fluid out due to the fluid stuck in the torque converter, if you do it with your 30k interval changes you will cycle through most of it in 2 or 3 changes.

-Mike Paisan


11+ Years Maintaining, Modifying and Educating TriState Subaru Enthusiasts.
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Mike,

Have you done this to one of the twins yet? If so, where did you mount the cooler?