Toyota 8FD/8FG Forklift Transmission Overhaul Gasket Kit

This is the transmission overhaul (O/H) gasket and seal set for the powershift transmission used in Toyota 8-series 1.5 to 3.0 ton internal-combustion forklifts. It cross-references to Toyota part numbers 04321-20840-71, 04321-20841-71 and 04321-U2020-71, so if one of those numbers is on your parts book page or old kit bag, this is the set.

Listed fitment: 8FD1030, 8FG1030, FDZN2030, FGZN2030, 8FDN1530, 8FGN1530, 8FDU1532, 8FGU1532 and 8FGCU2030. That covers the common 8FGU25 and 8FDU25 trucks you see in most warehouses. Check the model plate on your truck against this list before ordering; the 7-series trucks use a different kit.

The set includes the converter-housing-to-case and case-half paper gaskets, the control valve separator gaskets, the input and output lip seals, and the large and small O-rings for the clutch and pump circuits. It is what you need when the truck is leaking oil out of the bell housing or case split, or when you have the transmission apart for clutch packs and need everything sealed back up in one go.

On the bench: drain and pull the transmission, split the case, and lay the old gaskets next to the new ones to match each one before you scrape surfaces. Lube new O-rings with clean transmission oil, drive the lip seals in square, and torque the case bolts to the Toyota service manual spec for your model.