Overhauling the transmission means renewing as many of the wear and wear prone parts as possible, when replacing the selectors and their associated components. This will attain the best results, as interfacing used parts with new will lead to premature wear of the new parts, and a less crisp transmission action.
Other parts in the gear selector group of components you may wish to consider adding to your shopping cart:
You may wish to order new gaskets and gasket sealant, try this: 08C70K0234M used by trade professionals. Renew all the potential wear components to ensure a nice crisp gear-change! Add as many parts as you wish to the same shopping cart and still only pay the same single shipping cost.