Robert Merritt: I cannot answer your question from experience, however from what I have read they are interchangeable. For the education of all, I hereby offer a very comprehensive site, complete with credit to Gary Lewallen and Doug Ahern at the "AUTO HOBBY DIGEST": http://www.bigblockdart.com/axleinfo/8_75axle.htm This is the most information I have found in one place on the 8 3/4 axles and "Sure Grip" differentials. Good Luck, and 300ly John Mc Adams -----Original Message----- From: BobMerritt@a-znet [mailto:rcmerritt@xxxxxxxxxx] Sent: Tuesday, August 27, 2002 4:03 AM To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] 65 to 66 Can I switch complete rear axle housings from a 66 300 Coupe to a 65 300 L? My uncalibrated eyeball says I can -- was wondering if anyone had any previous experience making the swap. RRRRRrrobert