front diff slipping and making a clicking sound, help please

[Danny Harrison]

I got a caster s10b for our lasses kid to start racing with. It was fine but 1 of the wheels binded while on the track and now it sounds like the front diff is slipping and making a clicking sound under acceleration and braking.

I've stripped it down and checked the gears and they are fine. I took the diff apart and put back together tightening to what felt right too.

I cant figure it out, I'm 99% sure its diff related. If I hold the car against the floor and turn the spur gradually by hand, I can feel the tension building then its released with a click sound.

Any ideas what it is? Should I just buy a new diff assembly?

Thanks in advance for any advice recieved, I'm still reletively new to this game

[Danny Harrison]

After more fiddling it would seem the 'clicking' sound it coming from the spur gear when the slipper clutch slips. Could it just need new pads?

Edit, took the slipper out and its not that, I've finally narrowed it down to the rear diff, but now I'm at a dead end

[Timee80]

That would be the first thing to check then. At least it is a cheap option to try first

[Hpi_guy]

Have do looked at the bearings and inside the hubs, could be a collapsed bearing or some debris inside the hub, also check drive shafts and joints

[Danny Harrison]

ok its the front diff... New guy fail

I've uploaded a video of the problem.

The hex wrench is stopping the ball cup which attaches to the center drive shaft from spinning so the diff is slipping in the video. It only makes the sound when it slips.

No idea how to fix it or why it's doing it

http://www.youtube.com/watch?v=K6kYA...ature=youtu.be

[neallewis]

I can look on saturday for you...
How is the drive transferred from the spur shaft to the front diff?
Sounds like a belt slipping, but its not belt drive ;-)
I'll find the instructions online and take a look.