That decision is up to you. The transmission in my 99 would shudder before I replaced the filter and fluid with Amsoil ATF.
Synthetic Universal Transmission Fluid Product Code: ATFQT-EA
Offers excellent lubricating protection and better performance over a wider temperature range than conventional automatic transmission fluids. Recommended for a wide range of applications, including GM DEXRON® III-H, for 2005 and older vehicles originally calling for DEXRON®, DEXRON® II & DEXRON® III as well as Ford MERCON®, & MERCON® V plus many others.