my trans shifts all gears good butwhen i kick in the passing gear it seems to go into nutral intell i let off then it goes back into gear any help on what it may be

First check the fluid level and condition. If it's low top it up. It's possible the transmission is on it's way out and can't take the stress of a hard downshift. If you want to have it inspected then use this link to find a good shop near you.https://repairpal.com/repair-shops Alex

Throttle position sensor.