It's showing the rear axles on a '98+ Trooper as different part numbers than a VX, and they all have different part numbers for the left and right. We share the same # with a '92-'97 Trooper. It may still be compatible. Who knows why they change part numbers? It could be something that you couldn't find the difference if you had them side by side. But they are different part numbers.
I can't tell exactly what part the splined end of the axle meshes with to see if that part is the same. If someone could pinpoint that part, we could check to see if it's the same part number.
Edit- Take a look at the 12 bolt rear info on this page. Your '99 Trooper axle may not work on a VX.
http://www.zu4x.com/modules....
Mark
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