Depending on the type of unit you have. The Mcleod trans mount units can go away just with dust contamination their tech line recommended bleeding unit every other
oil change. there should be a bleed line coming out of the bell housing if this is your style. A vacu-bleed with careful attention to fluid level until clean fluid is seen in vacu-bleeder. Most trans mount units should be similar. Slave cylinder units outside bell housing are a different animal. Bleeding might help but slave cylinder could be failing.