Hey guys.The original differential is offset on the t555. The one I got , which is a peerless is centered. {both axles the same length} You will need to bolt the sprocket to the differential and since it is centered it won't fit under the motor mount. If you put the sprocket on one of the axles then you will end up with one wheel drive!! So the sprocket has to be bolted to the differential.... Just found this out the hard way today after relocating and rewelding the middle bearing hanger to go on the outside of the sprocket which I mounted directly to the right axle!!:doah: