Checking at the Fill Plug

Clean the area around the fill plug, and remove it from the side of the gear case.

Using your finger or a bent pipe cleaner, see if the fluid is level with the fill opening. See Fig..

Full

Low

If the fluid level is low, check the transmission for leaks, and correct as needed.

If needed, add the recommended fluid, until it is level with the lower edge of the fill opening. See Table.for approved transmission lubricants.

Clean the fill plug, then install it. Tighten the plug as follows:

For an Eaton Fuller transmission with a plug with 3/4-inch pipe threads, tighten the plug 25 to 35 lbf·ft (34 to 47 N·m).
For an Eaton Fuller transmission with a plug with 1-1/4-inch pipe threads, tighten the plug 60 to 75 lbf·ft (81 to 102 N·m).