Hi All
Changeing the Diff. & tranny fluid (doug nash 4+3 ) on my 1986 Z51.
Checked all the manuals for fluid amuonts but cannot find anything.

Any help would be appreciated . Oil capacity for the differential
manual trans
overdrive unit
Thanks

check the Tech Library, there is an article on diff fluid changing.

not sure about the levels in the 4+3. I will check.

I already checked the tech library ,the diff. fluid change says add 2 bottles of additive and nothing about the amount of gear oil. I think it might be about 2 quarts

My biggest concern is the tranny. Makes you wonder why these capacities are not in the owners or service manuals.

huh, i just checked my service manual, no reference to just how much, WTF???
anyhow, welcome to the guru. hope you find what you need here.

Quote:

The amount needed is rather nebulous, but on page 4, it states:

"Pump out the old oil, reverse
the hoses on the pump
and fill with the two bottles
of additive, topping off with
gear oil until full. It takes
about two quarts. Reinstall
the plug, lower the car, and
it?s done!"

It finds it's own level.

As for the transmission... According to the 1984 Helm Manual I have, it requires ~1 quart for the 4spd, and the OD unit requires ~2 quarts. Again, I suspect these items will find their own level.

I am pretty sure the 4spd uses a conventional manual transmission fluid, and the OD uses conventional auto transmission fluid, Dextron II or III.