Mar 1, 2017

Changing & Using Recommended Castor Oil for Differential

1 comment


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.

henri hendriksen
Jun 16, 2018

I was recommended to use Mobil SHC75W90 syntetic gear oil as an alternative.

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  • zangetron
    Jun 26, 2017

    Hello all, thank you for creating this site. I'm looking for a few bits and pieces, to start a Master brake cylinder. Can anyone point me to the right direction? Cheers Alex
  • tlangton7
    Jan 23, 2017

    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:
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    Nov 23, 2017

    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. .

This website designed by member volunteers to benefit and support "le Club 404" in NA in english.  It is not ot an official le club 404 site.

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