Slow drain new whirlpool

Does the sound go away when you block the overflow with palm of hand?... and slow to drain also?

5 ft. shouldn't have made a difference (never say never).

Should only take about 6-8 min to fill and about 4 min to drain.

buy another one and use it as a model to put yours back together then take it back for a refund.

you have to access the lower control the switch should be an air type one it uses air pressure from pushing in the button they some times crack ,dislodge or damaged and will not turn on or off unit also switch can fail

Make sure your drain system is vented properly. Lack of proper venting can cause poor drainage. Good Luck...

some people use spray foam which you can add later

Adjust the screw head at the bottom of the stopper.

Chances are that the drain assembly was not part of the tub but a 'generic' plumbing part. Is this pop up drain the type that you push down and it clicks closed and push down and then it pops up? It unscrews from the drain fitting and you can get a replacement at a big box store. A better pop up replacement is one called a Rapid-fit. It drains faster.

I take it that you removed the drain trip linkage and stopper through the vent hole .
You must now run a small hand or small power snake the less than eight feet to open the drain.
You can also plug up the vent,tightly and  try a flat plunger on the tub drain .  

Is this in the basement and if yes then you have a brake in the pipe some where because you say that your snake is stopped by cement.