Bulbs and fuses are good

Knocking starts as soon as I start car, some say it NY lifters some say my piston

1995 cutlass ciera oldsmobile .
I bought this car a few weeks ago everything was running great the car sat for about a year. The first thing I did was top off tranny fluid, oils changed ect. It was driving great.
I start my car no problems and when I drive it to about 15 mph it doesn't shift and acts like it's going into over drive which makes the check engine light turn on after it doesn't shift and i let off the gas and the car drives fine again with no shifting problems until the next time I have to turn it off and start it again. Could bad transmission fluid cause this?

I have change relay checked fuses and it will run if i jump the pump the grey wire on the relay. I found tge wire harness plug in the trunk was rotten. I cut and spliced them and made a new ground and still it wont send power to the pump with the key.
Any ideas?

There is a gray and red wire

saque los códigos de fallas y me arrojo el 43 y 44, el 44 hablaba del sensor de oxigeno y lo cambie, volví a realizar la prueba y ahora sale el 43, como desaparezco ese código

The cruise control and anti lock brakes went out at the same time. Changed the fuse that both were on. it didn't solve the problem.

I changed the fuse since there on the same one. No change. Someone mentioned that there is an ABS/relay that also controls both features.