94' chevy 4l60e problems

[Tjoe]

Can anyone help me out with a tranny prob? When i from park to reverse, or drive, it hits hard. Also when it shifts from 1st to 2nd it barks the tires, to 3rd its fine, then od it starts shuttering bad almost like traveling on a cattle guard. If i touch thr brake pedal, the vibration stops. Thanks for any and all hrlp.

[gmtech4]

Torque converter clutch is finished , you're disengaging it by touching the brake pedal ,

 

There may be an accumulator spring broken for harsh shifts ,

 

Might need a rebuild ,

 

Consider throwing in a rebuilt tranny , GMs has a 3 yr warranty ,,,,, on your way