oil requirementsfor trans

[Guest rlbyrnes]

what do i use for oil in the trans in a 1924 willys overland.

(engine and trans use same oil do i need to ad any additives:confused:???????????????

[Willys77]

Probably don't have to add any additives to the transmission. Have either of the units been rebuilt? That could have a bearing on things.

[Grimy]

For this car (equipped with crash box transmission and non-hypoid differential), I'd use 600W in both. You can get 600W from Model A Ford suppliers. Get the **real** 600W, which is dark, smelly and viscous; beware of the honey-colored, lighter stuff, which I suspect is often re-packaged 140-wt gear oil.

[Ozstatman]

.....(engine and trans use same oil ......

Do the engine and trans "share" the oil? Or is that they just use the same type of oil? I'd be careful of using 600W oil in an engine!

[Grimy]

Sorry, I somehow didn't give consideration to the statement that the engine and trans use the same oil. Are the engine and trans connected for oil sharing like a Model T? If so, do **not** use 600W in either the engine or trans, as it's way too thick. Ozstatman is right.

Generally, crash boxes benefit from a heavy gear oil (600W is about SAE 200 in today's grades), which slows the gears and promotes smoother shifting. If the car does share oil between engine and trans, that consideration does **not** apply. What does your owner's manual call for?