I've got 355,000 mi. on mine,.Wish they'd built transmission like this again.I won't buy nothing new now,they all fail early.I use syntheic in both my SD trans,and 722.605.I think the fluid not breaking down,and using neutral at stop lights helps alot.Trans coolers are a plus.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt