Trans and gear oil?

[Rawze]

(04-25-2021 )Redland1 Wrote:  The supertech 80w90 I found on Walmart.com is not synthetic.Is that the right one?

It is the one a lot of us use... Is there a particular reason you need only a synthetic? ... or is it just to make yourself feel better by spending more $$ moneys on oil?

would depend on your operations and climates that you frequent.

-- the next Q. would be "are you replacing all your gearbox oils at 250k miles (or equivalent hours) or every 2 years ... whichever comes first, usually at the same time you re-torque all your hub bearings and do all the other 250k truck maintenance ... like you should be?