Okay here is the gist: I have a trans built by Brian Hofer about 2.5 years ago. It has about 1500 miles on it. It sat for almost a year waiting on an engine rebuild. After the rebuild I realized I didn't have 4th gear. A friend familiar with both Turbo Buicks and the 200-4r took it apart and found that a retaining clip was missing allowing the clutches enough movement to burn up. Fixed that then promptly got in an accident a month later. Car sat for another 5 months waiting on a worthless "body man" (read hack) to fix it (my own fault for trying to save a buck). Here are the details on the trans: built by Hofer (or whoever built them for him) with billet super-servo, external cooler and filter, deep aluminum pan, 3200 PTC 10" L/U converter. Here is what happened: I took it out for an easy cruise just to get the old fuel out of the tank and fill up a fresh tank of 93. I noticed as soon as I left the neighborhood it seemed like the down-shifts were very harsh and jarring. Kinda thought it had just been a long time since I drove the car and forgot how it shifted. It did seem to get a bit worse, not terrible, but pretty harsh downshifts for sure. I was almost home and found a bit of open road and toe'd in to about half throttle just to see how it was running with fresh fuel. I ran it up to about 70 and let off the throttle...then a loud sound, not a boom but definitely not a normal sound and then no power. The engine continued to run but would just free rev when you applied throttle. I coasted to a stop and visually checked the underside...everything seems normal in drive shaft etc but I have no gears, not 1st, not 2nd not D, not O/D, not reverse. Feels like the trans is shifting into gear but it just revs like its in neutral. Fluid level is good and smells fine. So I'm thinking it could be: broken converter, wiped stator shaft splines, broken band, or something internal. Based on the hard down-shifts is there a "most likely" culprit? Between converter, trans, and fixing trans I already have a $hit-ton of money in the trans and just want this ordeal to be over.