Thursday, Feb 04, 2010 at 18:45
You DO NOT put NuLon additives in a differential with friction plates as previous reply. If you keep up the oil changes in the diff, even going as far as changing more frequently, with the manufacturers oil specifications,the diff will still be going strong when the body has long gone to the recyclers, if your model Toyota diff is a good design.
My recommendation as a Fitter/component rebuilder/Maintenance Planner if you are worried, is to go to Caterpillar or Komatsu and get an Oil Analysis bottle, learn how to take samples correctly, and get it analysed on a periodical schedule. This will tell you if the oil is breaking down from heat,the amount of which metals are present telling you which diff parts are wearing too rapid - if there is a problem, or if there is water ingress. The sampling will also establish what preventative maintenance - if at all - is required before going on any long trips.
The differential has been designed to handle the max towing rating with a specified oil and 2.5t is not much (maybe for a Tojo it is ! dig dig).
If you add this, you may find yourself at the bottom of a
hill with no drive, an expensive rebuild replacing the friction discs and cleaning the other parts, and lots of swearwords emanating from your mouth.
Just replace the oil regular as it's a quick, cheap, easy job and looking at the oil will tell you whats going on inside.
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