Here is my deal. Had the po741 code about a year ago on my 2001 sls with 38,000 miles. Did the brake check at 60, TCC not locking up. I decided to drive it till it broke. Cleared the code 3 times, came back 3 times, cleared it 4th time, has not reasserted in 12000 miles. Today I drove 20 miles into a 35 mile trip. Noticed at 70 mph rpm at 3300. At one point, I lost power, had it floored, and the car was slowing down. Pulled over, cycled to park and back to drive, worked ok for remaining 15 miles. When backing in to parking space, car shuddered like a manual car with clutch engaged at low rpm. 4 hours later, it did the same thing in drive, cleared up when I pushed on gas. Drive home had similar rpm/mph issues. Chattered again when pulling into garage. I know TCC or TCC solinoid or seals are bad, could this be a torque converter problem now too? I think I can drop the engine/tranny for removal in the garage, is it worth doing and finding more wrong, or should I take it to a professional?