Hi all.

Last weekend I was racing for the first time at one of our tracks. During the last race, I noticed that my engine was reving really high but my car was moving very fast at all. I mean, noticeable slower. I actually ended up having to pull it off the track. After I took a look at it I noticed that my right rear wheel sometimes spins freely and sometimes it will engage. Now I know that it should engage (spin the other wheel) but does this mean my diff is done? Are they repairable? Is it difficult?

BTW, My buggy is a OFNA Ultra LX Pro with a Hyper 8 port in it.

Thanks for any help!