How to replicate rotation smoothly,without character using controller rotation Yaw?

My character is already based on third person character.I almost didnt change any thing about Characters Forward&back Movement ,but to simulate the inertia of the character`s rotation, i used timeline for it,and change it to tank movement. I think the way i make it move like tanks cause all of this problems.

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when i link it like this ,the character rotate twice speed on the server

But the ForwardVector is the same with client.

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When the rotation only run on server,and no multicast,the client cant rotate at all, although in the servers view it rotated,but can`t actuall walk towards the direction of its rotation.

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When add in run on own client ,the server is fine ,but the rotation in client is half of the client.