The Shims/Spacers are supposed to be part of the Differential. However, they make different sized spacers (there is a recent thread on this).

No matter what type of Axle you use you may have to change the Shims/Spacers.

There is also 3 different type of Bolt setups that go into the end of the Axle that goes into the Wheel Bearing Hub.

With both of the above issues you need to have the Replacement Axles before you can sort it out.

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84 300D, 82 Volvo 244Gl Diesel