J240ZTurbo Posted March 31, 2010 Share Posted March 31, 2010 Hi, wordering what's the best fluid for my r200 diff and 5spd tranny with so many brands out there? Quote Link to comment Share on other sites More sharing options...
Dgriggs Posted March 31, 2010 Share Posted March 31, 2010 About 6 years ago I switched the fluid in my early 5 speed to Redline MTL 90. The friction modifiers in that formulation allow the tired old synchros to do a better job of, well, synchronizing. I had much better shifting much sooner (shorter "warm up" time)than with the old 90 weight. If you are not sure what you need for your application, Redline, Amsoil, and Royal Purple have tech staff to point you in the right direction. DG Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 31, 2010 Share Posted March 31, 2010 This has been discussed many times. SWEPCO 201 is my choice. Redline, Amsoil, etc all work just fine too. Quote Link to comment Share on other sites More sharing options...
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