I took it to the shop because after its shifts at 45mph on normal driving when I get to 50 -60 mph and I remove my foot of the gas pedal ,he automaticaly down ****fs to 3rd at 60 mph, then I just give gas and start slipping until It gets on the right gear..
they repaced the Torq converter cluth selenoid and now

When the car shifts on normal driving it starts tu pulse, but it only does after it shifts, like when the car has a missfire but it hasn't, its like the tranny is going wild and crazy like it is confuse to wich shift it should go?

the tranny had a rebuil like 3 months ago