Riddle me this...

Ok my car doesn't have positive if only one wheel turns when it's jacked up, right? In that case I did two turns of the wheel and ended up with 2 3/4 turns of the driveshaft. Making it a 2.76. I've used a GPS to measure my speed and it's 3000 Rpm at 65. Now without all the computer stuff to calibrate my tach, my ear tells me it's turning a lot of rpm, not 2500. So I'm really thinking my torque converter really may be losing that much. When I punch it the rpms will go way up and stay there (about 2600) until I hit a certain speed and then they'll climb with the mph. Also at 65 if I punch it the rpms will climb a bit to say 3300 then go up with mph.

Do you think when the local shop rebuilt my torque converter they screwed it up?