CHEVROLET SILVERADO DRIVETRAIN

I Have The Truck Listed Above. I Need To Figure Out If This Other Transmission That I Bought Is Actually For A 4wd Like I Was Told By The...

So I Was Driving And The Vehicle Jerked Then Wouldn't Go Out Of Second Gear Until I Parked Somewhere And Turned It Off. Wen I Turned It...

Won't Shift Up, Revs Super High, Speedometer Not Working Until I Hit A Bump. Changed These Items: New A/c System(entire), Brake...