Should i flush my transmission or just change it? 54k miles.Help!?
Trans fluid is changed at mileage intervals, and near the end, it looks like you describe. You want to do both: flush and filter. The filter and the pan hold the real contaminants, so those get changed and cleaned...but then you're left with a giant amount of fluids in the system. Torque converter, piping, cooler, piping...the amount is not insignificant. So, you get a clean filter and pan cleaned and reinstalled, the next thing is the flush. The t-teck machine is my fav, what it does is has a ful reservoir of clean and new fluid, and an empty container.....They run the car, allow fluid to pump out, and new fluid to go in....This keeps up until the fluid coming out of the trans system is clean. It really is the best way, I think. The lube shops are the place to get it done, as this job is leak prone, messy and generates lots of fluid to be disposed of.Neither of these processes should be able to cause damage. Sometimes the trans pan leaks, so get it attended to...not a big deal.