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Now i know that Redline MT90 is a popular choice: http://www.opieoils.co.uk/p-1020-redlin ... 0-gl4.aspx
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Looking at the spec MT90 is only GL4 where as other redline products are GL5: http://www.opieoils.co.uk/p-1016-redlin ... 0-gl5.aspx
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Also would i need a friction modifier for the TRD diff as its a plate type diff? Or is it a case of try it, and if its clunking/chattering a lot- put some in?