I have a 1988 chevy s19 blazer 4x4 and I got a rebuilt transmission I put it in hook everything up and at first I only got second I messed with the sifter and got one or two gears no park or reverse really need help guys

Are you sure the linkage bracket on transmission is not installed upside down? Can you send a picture?

And it won’t shift properly only got first didn’t mean to say second

Take out the rod from shifter then Unbolt the bracket and turn it over so the arm is pointing down. The put shifter rod back in place. Give that a try. Good luck.