One thing is for certain, my driving sucks! These trucks may need a little work, but they are a blast.

1 quart of fuel into it and I think I am having problems with the front differential. When you turn the front wheels, they turn smoothly for about 1 1/2 turns then it gets real rough for about 1/4 to 1/2 turn. Then it's smooth again. I ordered a replacement bevel gear (along with the center joint cup I lost the set screw out of), but could not find the differential gear. Has anyone ever replaced these before? I removed the drive shaft and am running it on 2WD until I get the gear thing straightened out.

These joint cups use a Metric 4 .4 set screw. Impossible to find around here. I found a M4 .6 and took it down on the grider for now. But I would prefer to use the right part.

Also, when I pull the front differential housing apart, will it be filled with an oil like 1:1 cars? If so, what do I need to put back in there?

Thanks.