yours sounds like it's not downshifting into 2nd then 1st... if you get it into 3rd and put it in tow/haul mode and start to slow down (coast) you should see it downshift, then at 25 mph, the TC should un-lock.

forgot to answer your question... mine was not fully shifting into 2nd consistantly and when it downshifted, it went with a clunk from time to time. if I manually shift it, it works better but it's still a problem. the dealer today told me the fluid is burnt, last week it wasnt so I'm assuming it's gone from bad to worse...

 

It would be very hard to break an ATS transmission with a billet input shaft. BUT the ATS equipment is very expensive. ATS has a 150,000 mile war. but you MUST change the Trans Fluid every 15,000 miles, including draining the torque converter, and the work must be done by a shop, no "do it your self". When I had my fluid changed at 15,000 miles, it was quite dark, so I assume the 15,000 mile change interval is needed. My transmission temp. has never gotten above 180 when pulling on the road, and only occ. 200 around town in heavy trafic.

As you have decided to go with your local trans shop it's moot at this point. If your local shop knows what it's doing you should be good for a very long time.

Ralph