TyphonDude
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A while ago, after a dirty bash on muddy wet grass, the rear wheels of my Typhon 6S stopped spinning. The front wheels were fine, and the dogbone shaft leading to the rear wheels were spinning. But the rear wheels were stuck.
Turned out that the rear differential gears were shredded. Both the input gear, and the main 43T gear, which mate to each other, were shredded. See photos at the end of the the post.
Part to fix is Arrma Diff Set Front/Rear 43T Straight Typhon, AR220028 $90.99, which includes the input gear, main 43T, along with diff case, internal gears/seals, etc. Note it doesn't come with bearings.
Although the exisitng internal gears and case looked fine, I found that after re-assembling and screwing the cover back on that it was too tight. Not sure why it was so tight, but I ended up replacing the case and internal gears with the new ones that came with the AR220028 diff set.
Then I found that one of the bearings were stuck. So replaced both bearings with XY940816 XRAY HIGH-SPEED BALL-BEARING 8X16X5 RUBBER SEALED (2) $11.08 for 2 bearings.
Another tip is to use brake cleaner to clean the crusty internal parts. Mine were covered in black dirty stuff. Spray directly onto the parts into a plastic container, use outdoors, and wear a mask, hold your breath. Any remaining fluid in the plastic container will evaporate after a day, but keep the container with remaining fluid outdoors.
Since the diff was open, might as well replace the shims. The original shims were in really bad condition, all warped. Some say the original shims are too thin and to double or get thicker Mugen Seiki E0206 shims. Couldn't find that brand, but found these, which are the same size as the Mugen Seiki: XY964030 XRAY WASHER S 3.5X12X0.2 10PCS - XY964030 $13.29. Need 4 per diff, so 12 in total. That's two of the 10PCS XRAY packs, with 8 left over.
Last tip is to also add a shim between the o-ring and little rod, mainly to protect the o-ring from getting shredded by the rod. The Typhon V4 comes with this already, and the part number is ARA709057: Arrma Shim 5.4x9.5x0.2mm (8) $11.98. Need 2 per diff, so 6 in total. That's just one pack. Note there's a video on YouTube that recommends another brand, but it must have been made before V4 Typhon - Use the Arrma ones instead.
See the photo below. I can't find any photos of the shredded main gear, but here's a photo of the input gear ... the gear on the right is bad, the gear on the left is good:
Turned out that the rear differential gears were shredded. Both the input gear, and the main 43T gear, which mate to each other, were shredded. See photos at the end of the the post.
Part to fix is Arrma Diff Set Front/Rear 43T Straight Typhon, AR220028 $90.99, which includes the input gear, main 43T, along with diff case, internal gears/seals, etc. Note it doesn't come with bearings.
Although the exisitng internal gears and case looked fine, I found that after re-assembling and screwing the cover back on that it was too tight. Not sure why it was so tight, but I ended up replacing the case and internal gears with the new ones that came with the AR220028 diff set.
Then I found that one of the bearings were stuck. So replaced both bearings with XY940816 XRAY HIGH-SPEED BALL-BEARING 8X16X5 RUBBER SEALED (2) $11.08 for 2 bearings.
Another tip is to use brake cleaner to clean the crusty internal parts. Mine were covered in black dirty stuff. Spray directly onto the parts into a plastic container, use outdoors, and wear a mask, hold your breath. Any remaining fluid in the plastic container will evaporate after a day, but keep the container with remaining fluid outdoors.
Since the diff was open, might as well replace the shims. The original shims were in really bad condition, all warped. Some say the original shims are too thin and to double or get thicker Mugen Seiki E0206 shims. Couldn't find that brand, but found these, which are the same size as the Mugen Seiki: XY964030 XRAY WASHER S 3.5X12X0.2 10PCS - XY964030 $13.29. Need 4 per diff, so 12 in total. That's two of the 10PCS XRAY packs, with 8 left over.
Last tip is to also add a shim between the o-ring and little rod, mainly to protect the o-ring from getting shredded by the rod. The Typhon V4 comes with this already, and the part number is ARA709057: Arrma Shim 5.4x9.5x0.2mm (8) $11.98. Need 2 per diff, so 6 in total. That's just one pack. Note there's a video on YouTube that recommends another brand, but it must have been made before V4 Typhon - Use the Arrma ones instead.
See the photo below. I can't find any photos of the shredded main gear, but here's a photo of the input gear ... the gear on the right is bad, the gear on the left is good: