meadowbrook Posted February 17, 2017 Report Share Posted February 17, 2017 Are there yellow metal parts in a 50 D34 diff that would not 'like' a GL5 hypoid lube? Quote Link to comment Share on other sites More sharing options...
Dartgame Posted February 17, 2017 Report Share Posted February 17, 2017 I don't think so. I would use standard 90wt gear lube. There might be a brass rubbing block in the center, but I would pay no attention to it. Quote Link to comment Share on other sites More sharing options...
oldmopar Posted February 18, 2017 Report Share Posted February 18, 2017 the gl5 should be ok for the rear. The gl4 is usually recommended for the trans. Not sure how much of a difference it makes but I just keep a gallon of the gl4 in the garage for the older vehicles. Quote Link to comment Share on other sites More sharing options...
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