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good driveshaft. but the differential i dont know about them. I opened them up and it was only a ting bead of grease that I cleaned away to add new grease. on the picture i you can see when I removed original grease. look at the 4 gears one is different Shape then the rest of them. dont think its supose to be so. but they seem to have no problem when I turn them manual whith my hands. _although i think there was to much play on the drive cups when turning whith my hands i can almost drag them out sideways 1-2 mm each. so I did not use the differential. I only used the driveshaft._my stock driveshaft cracked when I crashed. _happy whith the new driveshaft but using my stock differentials. gonna use them until i need to replace them.
strong components and mextals I have used it for over 3 month now and has not worn done the gears to the diff and diff gears.__the bearings are as smooth as butter.