I guess I have a few more questions.The doo drivers are a different shape from one side to the other is there a specific way they should be faced.I see there is an arrow on the drivers I assume this is to keep them synced,correct?Also on the axle there are 2 lock collars,one at each end,do you still use these.If you do where do you put them,in the stock location or move them up against the new drivers?Is there anything else I should replace?Sled has 850 miles everthing seems ok?Thanks