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- San Antonio, Texas
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- '15 CX-5 Miata AWD
Mazda calls it a pto (power take off), but it's similar to a transfer case in that it's a way to get torque to the rear tires, if you have an awd model. The pto engages splines in the tranny and bolts directly to the side of it. The difference from a conventional transfer case is that it's always engaged and therefore the driveshaft is always spinning. When the system detects a difference in wheel speed front to rear, it engages an electromechanical clutch bolted to the front of the rear diff and you are in awd. The oil used is not as nearly as good as a high quality gl5+ full synthetic in reducing friction, heat, oxidative stability, etc. When I changed mine it was definitely at the end of its useful life and the diff and xfer case where less than half full. I'm not going to get in a big debate over which oil is best but I've been using both redline and royal purple for over 20 years in high performance sports cars, daily drivers and trucks and suv's with great success. You can find a high performance oil like these from amazon, Summit, Walmart, etc.
Did you jsut use one of those hand vacuum pumps? I have one, haven't used it though. It has a hse and a "suction cup" type attatchment,