Aaron1505
Member
A local gm shop told me that the Mobil 1 ls 75 90w synthetic is ok for a nv4500. Has anyone run this or know if it's ok to use?
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I've read a few times its recommended to overfil the NV4500 some through the shifter.
I don't know but I think the shaft connection to a transfer case likes the extra oil by helping ensure splash lube. And heard it helps the shifting (lubes the shift tower???).
When I did my clutch several yrs ago I discovered my transmission/transfer case mating shafts had been packed with grease. The grease was dried out and it appeared the lube doesn't get to this area very well???
an aftermarket set of synchros could be brass, and that will behave with most oils. that may be why you are getting along fine.