ivs got the same vehicle at 139k miles. trans is still working great but when it starts acting up i intend on rebuilding it myself for approx $2,500 and that will include a new converter/tehcm. The 6L80E is really a rebuilders dream as they are somewhat simple. Just my opinion but dropping the tehcm and installing the "films" on the solenoids is a good idea if you were going to rebuild the trans but not as a cure for your issues. spend the hundred on a "trusted" diagnosis from a "hundreds of good reviews" trans shop. does it act any differently stone cold as opposed to op temp? the shop can diagnose faults/pump pressure but not the cracked/leaking drum which would require the teardown. junkyard trans, unknown condition. your trans has survived 175k miles and still going. i would opt for the rebuild with a solid warranty. anyway, it is no fun to have to deal with major repairs when cash is tight! hang in there.