Mk III version, incorporating a bigger inner pinion bearing and rubber chassis seal. As well as our through shaft lockers, Hobao standard open diffs with any Hobao pinion/crown gears can now be fitted*.
This is now a dedicated Hobao gear fit. ARRMA DIFFS AND LOCKERS WILL NOT FIT.
Aluminium 7075 T6 upgrade Diff Housing to suit all 6s 1/8th and 1/7th scale Arrma trucks. For racers, bashers, drifters drag racers and speed runners.
You will need to use the same gears front and rear - so a pair of housings will need to be purchased.
This housing allows your Arrma build to run Hoboa diffs. These gears are really nice quality giving super durable and smooth drive. The output shafts are 6mm (rather than 5mm), The input gears are a huge 8mm shaft (rather than 5mm)
Our Hobao Through Shaft Diff Lockers can be used, with 6mm shafts, making them pretty much unbreakable, even for the hardest drag runs. This is the same setup we used on our 219mph world record setting car.
Key Features:
- Huge oversize pinion bearing. Uses a 8x16x5 bearing. (abec 7 ceramic bearings and shims included!) Far larger than other housings giving dependable durability in the most extreme applications
- Extra wide diff bearing seating allowing the hobao lockers to fit.
- Precision fit diff bearings. Our unique bearing arrangement guarantees a perfect fit for the diff rotor bearings. Other housings typically crush the bearings or are loose. Ours are a perfect fit every time - a design and tolerance system proven in our motor mounts. (The slots seen above the bearing are filled to prevent dirt ingress)
- Super high quality machine work. Our machining is no-expense-spared. The best precision and aesthetics finishing out there!
*Our Hobao diff lockers are a good fit with Arrma axle shafts. Hobao open diffs are 1mm narrower per side. On Kraton length axle vehicles where the axles are already short, modification to move the axles inboard would need to be made. On other vehicles an oring spacer on the rear axles will be enough.
Shopping list checklist:
2 x Arrma Bulkheads for Hobao Gear Conversion
2 x Hobao style Through Shaft Diff locker assemblies (Or use std open diffs)
2 x Hobao Crown and Pinion Gears, HOP-0146 and HOP-0147
2 x Hobao type 8mm Diff Input cups (optional)
If you are buying our Trident shaft to go with an Hobao gear conversion, please select the ‘8mm’ cup option.