By chance, does the fluid indicate the system may be dirty? If you are getting a whine from the pump, either it is working harder than it should or the pump is going bad.
Keep in mind, when you are moving, the assistance from the pump is lessened. Therefore, you have a much better chance it won't make noise.
I suspect the new pump is failing. Also, if there is excessive dirt in the fluid, I would flush the system prior to replacing the pump. Otherwise, the same thing will likely happen again.
By chance, is the pump still under warranty? Often times they come with a lifetime warranty.
Let me know.
Joe
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Monday, March 28th, 2022 AT 6:13 PM