In some cases oil from the xfer case migrates into the transmission; it depends on the condition of the seal between the two. Instead of periodically adjusting the levels, one can install an oil return line connecting the transmission and xfer case fill holes to do it automatically. The parts are available from most hydraulic supply stores; the gaskets are a stock item at Toyota. It also makes it quick and easy to check oil levels without removing the plugs.
2 ea. - Metric Adapter
#6 Male JIC TO 18mm X 1.50 - Steel
2 ea. - Push-Lok Hose Fitting,
3/8" #6 Female JIC -Swivel 90°-Elbow-Short Drop, 3/8" I.D. Hose, Steel
2 ea. - Plug Gasket - 18mm ID, aluminum - Toyota p/n 90430-18008
3/8" or 10mm ID hose [1.5 to 2 ft]
NOTE: Mud Member shipmag sells a deluxe return line made-to-order with hi temp SS clad hose and banjo fittings. send a message to him for details
2 ea. - Metric Adapter
#6 Male JIC TO 18mm X 1.50 - Steel
2 ea. - Push-Lok Hose Fitting,
3/8" #6 Female JIC -Swivel 90°-Elbow-Short Drop, 3/8" I.D. Hose, Steel
2 ea. - Plug Gasket - 18mm ID, aluminum - Toyota p/n 90430-18008
3/8" or 10mm ID hose [1.5 to 2 ft]
NOTE: Mud Member shipmag sells a deluxe return line made-to-order with hi temp SS clad hose and banjo fittings. send a message to him for details
Last edited: