tricycle differential slipping -HELP-

[fjernt]

Hi! Recently got a new trike, it can be seen in the fresh finds part of the forum.
The problem is, when I try to pedal it, everything works fine, until it gets to the rear axle/differential. The diff/drive spins, but it slips on the axle.Does anyone know how to fix this, or could share some useful links? I am at a loss here..

 

[horsefarmer]

Prob. gonna have to open it up, some of the gears may be worn out.

 

[RustySprockets]

I don't know exactly how your set-up works, but a slipping axle could indicate a loose or missing woodruff key. I had a Miami Sun that fell victim to this and the original owner just kept tightening (unsuccessfully) the retaining screw. A replacement key, plus a few minutes with a file, and all was right with the world again.

 

[fjernt]

View attachment 46481
Prob. gonna have to open it up, some of the gears may be worn out.

I cant figure out how to get it off/open tho..

 

[horsefarmer]

In the other pics you posted it looks like pop rivets - if so just drill em out.