slip

Hey everyone I am new here, my Buick has recently starting to slip, it started probly a little over a month ago and now it's having problems going from 1st to 2nd, when I first got it I would accelerate just up to 10-15 mph, release gas, then quickly gas it again and it would catch gears, but...

I've posted on here before (About my rusted out sway bar) and got some feedback that really helped me, so I'm hoping everyone can give some advice again. Recently I've had some transmission problems. Specifically: I'll start the car, but when I shift into Drive (Overdrive) or 3rd and give it...