Overview
The G2 Dana 50/60/70 aluminum cover (part number 40-2034AL) is a differential cover for most Dana 60 and Dana 70 front or rear axles. The title also names Dana 50 axles. It is cast from lightweight aluminum with a raw natural finish.
The cover protects the ring and pinion and helps cool the gear oil. Reinforcing ribs add rigidity, and the cover is heat treated and shot peened to handle direct hits.
Dana 60 and Dana 70 housings are heavier-duty than the Dana 30. The cover’s fit depends on the front axle style, so confirm the front axle style before ordering.
Key features
- Cast from lightweight aluminum to dissipate heat
- Reinforcing ribs for rigidity and strength
- Heat treated and shot peened
- Fully machined seal surface
Gear oil and axle heat
A differential cover does two jobs: it keeps road grime and water away from the ring and pinion, and it gives the gear oil and housing a larger surface to shed heat. Under sustained load, such as towing or long climbs in low range, the oil heats up and thins, so a cover that moves heat away from the oil helps protect the bearings and gears.
Before fitting any cover, clean the housing flange and the cover sealing surface until both are flat and free of old gasket material. Use a gasket that suits the cover, and tighten the bolts evenly in a crisscross pattern. Check the fluid level after the first few drives, since some fluid can settle into the new cover space.
Front axles on Dana 60 and Dana 70 setups vary in steering geometry, so the front cover choice is closely tied to the axle style. Rear covers are usually simpler to match. Either way, pair the cover with a fresh fill of the correct gear oil.
- Clean both sealing surfaces before installing
- Use a new gasket for every install
- Check fluid level after the first drives
Specifications
| Brand | G2 Axle and Gear |
|---|---|
| Part number | 40-2034AL |
| Axle location | Front or rear |
| Axle types | Dana 60, Dana 61 and Dana 70 |
| Material | Aluminum |
| Oil capacity | Extra capacity |
| Finish | Natural |
Vehicle fitment
It fits most Dana 60, Dana 61 and Dana 70 axles, but not leaf spring front axles without high steer. Confirm the front axle style before ordering.
Installation notes
Leaf spring front axles need high steer to clear this cover, so confirm the front axle style before fitting.
