Rear wheels spin opposite from front!!!

[Hypergarage]

This is extremely frustrating. I have 2 boom racing scx10 all metal axles that are brand new and I just installed them. The front wheels spin the correct direction the rears spin backward. I opened the rear axle to switch the diff around but the way the axle is built it won't fit when switched around. Can someone please help?

[sharkattack99]

Have you tried to switch the front?

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[bhoush]

Flip the whole axle


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[Hypergarage]

Flipping the whole axle wouldn't work because of the way it's fabricated. I will try switching the front thanks.

[whitrzac]

Pictures?

All of the axles I see should be able to have the diff flipped.

[Hypergarage]

Switching the front isn't possible either because of the axle housing. Still need help

[VTHokie]

Ensure the outer brace holes are facing up on both axles. One is probably upside down.

[Hypergarage]

[/IMG]

That is not the axle I have. This one is Boom Racing Axial SCX10 Complete Assembled Aluminum Rear Axle - 1 Set Black BR233023

This axle is not like the stock scx10 housings. These are fabricated so that the diff can only be one way. I don't know what else to do

[Rotare]

Have you tried contacting Boom Racing direct? I've always found them very helpful and responsive to any queries I've had of their products.

[Hypergarage]

Just did I guess I'll see what they say

[VTHokie]

Well that changes things a bit.

[Meatwad]

If it's like that one you linked, there's room to flip it...

[kgb424]

I had that same problem when I built my Wraith Kit

Both axles would spin in opposite directions and it would not move forward or backwards

It took me a little while to figure out, too flip the diff's around in the axles

And that corrected the problem

[HahnsB2]

Originally Posted by Meatwad

If it's like that one you linked, there's room to flip it...

Sure looks like those internal gussets on the other side will hit the ring gear. Perhaps if you grind them away.


I'm guessing Boom didn't think about this problem and built them willy nilly, wish they had an internal shot of their front diff so you could see which side the gear is on. I'm all for saving a buck on parts sometimes but from what I've seen, metal axle housings isn't one of the areas where I'd skimp.

[Hypergarage]

Think I might have figured it out. I'm about to see right now

[aiden102408]

Try flipping the gears around in the housings


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[whitrzac]

Take the plate that the pinion gear is attached to, move it to the other side of the axle.

[allanon1965]

Originally Posted by whitrzac

Take the plate that the pinion gear is attached to, move it to the other side of the axle.

you mean the ring gear right

[whitrzac]

No, the pinon gear. The plate looks like it could be put on the other side, reversing the rotation.

[allanon1965]

ok, well the ring gear is the only gear shown in the picture, the driveshaft connects to the pinion gear and on the website, that is in a fixed position.. the ring gear most likely can be moved and if it hits the gussets on the left side, then dremel some clearance for the gear...not rocket science... of course this is from just looking at what can be seen from the picture provided...without being able to see the entire cavity, its hard to say 100% that it will work.