Quote:
Originally Posted by Superman
Glad for this discussion. I have a 2013 Mazda 5 that showed dirty transmission fluid at 60K. I was 750 past the warranty when I asked them to look at it. I pulled the pan, changed the filter and replaced the fallen fluid. I think I once again drained and filled. I probably replaced....50-60% of the fluid. It is still not RED, and looks mostly gray.
I would happily (a relative term) have the dealer flush and replace 100% if I thought it would do more good than harm. There is no slippage. I suspect the torque converter, not so much the transmission, based on a little vibration mostly, developed lately. All its life, building torque after a stop has required a little more RPMs than most transmissions, but the car has always otherwise shifted just fine. I think this needs a different torque converter, but my first decision is whether to replace the fluid or not. More harm than good? More good than harm?
Your perspective appreciated.
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Bump. You guys have failed to answer my question.
The car has 90K miles. No slipping or shifting problems. Suspect torque converter. I am thinking about having the fluid flushed/replaced. I predict this would do more good than harm, but not sure about that.
greglepore has a similar question. We know that dirty fluid can contain abrasives that the tired/worn transmission now needs, and that flushing and replacing that fluid can cause the transmission to have a slipping problem.