Hola In 1963 and 1964 they had two transmission's for the Chrysler's and the Imperial Division. The normal was called the Med. Duty and the other was called Heavy Duty. The lessor transmission should have the number 2408006 and the beefier transmison will have 2464426. The same two transmission's were also used by big block Plymouths or Dodge's and any of their cars that used the 413 or 383. The usage of trim levels had no bearing. Rodger & Gabby Colo Spgs '47 De Soto Custom w/Fluid Drive & passenger door mounted swamp cooler '62 Crown Coupe w/std A/C & Auto-Pilot '66 Le Baron w/dual A/C & reverbed AM/FM '70 Overlander - InterNational Dbl '70 W100 w/318, NP 4 Spd, 3:55 & Short Box '77 D150 w/360, NP 4 Spd, 12 Bolt Axle, OEM Buckets & etc ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm