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Has anyone here changed there transmission oil and rear diff oil to redline or royal purple?
If anyone has done this. what type of oil and how much to do both the transmission and rear diff?
 

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i believe the tranny is sealed therefore maitenance free and does not need to be flushed...

not sure about the diff though...
 

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^^ Exactly, the transmission has a lifetime ATF fill and is not meant to be changed in the traditional way. Lexus dealerships will urge owners to have it checked at 100,000 miles, but I'm pretty sure we're all pretty far from that at the moment.

Rear diff is another thing. I'll ask around.
 
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