Thanks to all that responded to my questions. I woke up and took a look at my service manual and determined that the front u-joint on my 1955 C-300 is the ball and trunnion type. Chrysler said "This balanced installation is designed to absorb the torque and thrust of the drive line." The ball and trunnion front joint was apparently used on all models in 1955 except the Crown Imperial. The Crowns had two drive shafts with a center bearing and open joints at all four locations. I'll have to check my boot next time the car is up on a rack. Any recommendations of sources for a replacement boot in case I need one? There are 3 1/2 pages describing how to service the ball and trunnion joint. Looks like fun. Rich Barber Brentwood, CA C-300 ------------------------ Yahoo! Groups Sponsor --------------------~--> Yahoo! Autos. Everything you need to know about buying or selling a car. FREE Quotes, 360° Tours, Research, Blue Book, Compare Vehicles, Buy Used http://us.click.yahoo.com/kEZsdA/bwnGAA/YiGOAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/