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Can someone tell me what weight of oil to put in the transfer case on a 1980 F-150? I inherited my Dad's old truck and there is no owners manual with it. Thanks in advance.
Back in those days it basically went, Aluminum case used ATF and Cast Iron case used 80-90 wt gear oil. Unless you had a NP 203 transfer case and you used 30 wt motor oil.
05-23-2017, 05:57 AM
