Zoom Boom 6042 by Care lift. Basically a "Lull". I'm doing a PM drain and refill on two differentials on a telehandler for a customer. Also doing/did the final drives. I was considering using a synthetic 75W-90 in the finals (because I have a few pails of it), but just bought another pail of the 80W-90. Would the 75W-90 full synthetic have been an acceptable substitute in the finals? Brakes have no issues, that I know of. Owner's manual specs 80W-90 GL-5 and adding 1/2 liter of FM 7099 to each diff. Anyone have good info what FM7099 is? What could I use as a substitute? Where could I buy FM 7099(F)? Thanks for any help! Bruce
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