Daihatsu Hijet — Transmission & Differentials
Manual transmission, transfer case, and front/rear differential fluid specs and change procedure.
Note:The S110P 4WD has three separate fluid sumps: the manual transmission (which includes the transfer case in its 2.3 L fill), the front differential, and the rear differential. All three should be serviced together on the same interval.
Manual Transmission
Capacity — 4WD (incl. transfer case)
2.3 L
Capacity — 2WD
1.1 L
Fluid Spec
API GL-4 75W or 75W-80
Fill Level
0 – 5 mm below fill plug threads
Change Interval
Every 40,000 km
Danger:Never use GL-5 gear oil in the manual gearbox. GL-5's sulfur-phosphorus additives chemically attack the brass synchronizer rings in Daihatsu transmissions, causing grinding and shift failure. GL-4 only.
Compatible Manual Transmission Fluids (GL-4)
| Brand | Part Number | Notes / Info |
|---|---|---|
| Redline | MT-LV 70W | GL-4 — closest match to OEM Ammix spec |
| Motul | Gear 300 75W-90 | GL-4 75W-90 — widely available |
| Valvoline | VV975 | Full Synthetic GL-4 75W-90 |
| Amsoil | MTG | Manual Transmission & Transaxle Gear Oil 75W-90 GL-4 |
Differentials
Front Differential
0.5 L — GL-5 80W-90
Rear Differential (standard)
1.1 L — GL-5 80W-90
Rear Differential (with diff lock)
1.3 L — GL-5 SAE 90W
Fill Level
0 – 5 mm below fill plug threads
Tip:Inspect the differential drain plug magnets every service. A small amount of fine metallic fuzz is normal; chunks or a heavy coating of metal particles indicates abnormal wear.
Compatible Differential Fluids (GL-5)
| Brand | Part Number | Notes / Info |
|---|---|---|
| Redline | 80W-90 GL-5 | Front and rear differential — hypoid gear oil |
| Valvoline | Gear Oil 80W-90 | API GL-5 — widely available |
| Royal Purple | Max Gear 80W-90 | API GL-5 full synthetic |
Drain & Fill Procedure
- Warm the truck up first — warm fluid drains faster and carries more contaminants out. Park level and shut the engine off.
- Always remove the fill plug before the drain plug. If the fill plug is seized you will have no way to refill after draining.
- Remove the drain plug and let the old fluid drain fully. Inspect the drain plug magnet for metal particles.
- Reinstall the drain plug.
- Fill through the fill hole until fluid just begins to weep out at the fill plug threads — this is the correct level.
- Reinstall the fill plug. Repeat for front differential and rear differential.
Tip:Use a fluid pump or squeeze bottle with a flexible hose to fill — the fill openings are in tight spots and direct pouring causes spillage.