I have a 1994 Ford Explorer 4x4 U joint issues?

I recently had the The U joints done on the front end. My question The middle U joint, Do you half to drop the front end to change the u joint?|||no you should have constant velocity joints at the wheels and on the diff. end there will be a u joint at the driveshaft to the front diff. there is no need to drop the front end|||yup