pkrface |
04-27-2015 05:41 PM |
Yes, you can mix reg and syn assuming that both are compatible with your particular trans. Make sure, otherwise fatal problems can occur. As for the question of what good it does to do a drain and fill where all the fluid isn't exchanged, the old fluid had additives in it that are now depleted and exchanging some of the fluid is better than doing nothing. In fact some manufacturers recommend only doing a drain and fill vs a flush. I personally would never do a flush using a machine that back flushes or applies more pressure than the system would otherwise produce. I also would never flush using a machine if the trans had not been regularly serviced since brand new as once a varnish has built up it can be very detrimental to loosen up all of that varnish and release it throughout the trans.
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