We have negotiated a discounted price for NA 404 & 504 owners with White Post Restoration in VA. They offer a lifetime warranty on their hydros and brake cylinders they redo. Contact us so we can arrange to help you.
Pitting and chipping of the large bronze crown gear in the rear differential is a common problem with 404s in NA because of the lack of castor oil availability here and ignorance that modern EP differential gear oils attack the 404 bronze elements. We have arranged to import 2L tins of castor oil for site subscribers. A complete explanation of how to flush your differential and order castor can be found on our blog post here .
Several US based 404 owners have used Armiture Services, Inc. in Little Rock AR to redo their Ducelier and Paris Rhone starters. Ed Hairston guarantees his starters for 2 years and charges less than $100 for a typical rebuild. He sources his solenoids from Germany and does a great job with starters and small electrical engine repairs such as classic fuel pumps, heaters, wiper motors, etc.. Tel. 877) 880-3110 web: http://www.armatureserviceco.com