Chris,
Providing you renewed the oil seals on the output flanges, and there is no wear grooves on the seal paths, then there should be no reason to add "snake oil" to the transfer box. The standard oil grade was SAE 90 EP or 80w/90. Check the breather is not blocked, it is in the top part of the dipstick.
cheers Richard
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Richard
1943 Bedford QLD lorry - 1941 BSA WM20 m/cycle - 1943 Daimler Scout Car Mk2
Member of MVT, IMPS, MVG of NSW, KVE and AMVCS
KVE President & KVE News Editor
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