If you can make do with it, use it for a while. If the looseness is very serious, it must be replaced. I have repaired this before, and they had to replace it with a set called a "tape transport system assembly", including the magnetic heads. There is no other way. (The price varies in regions of 500-800)

If the machine is not old for a long time, it is still not recommended to replace it because it is only broken a little, and my repaired machine is not as good as the original machine.

If the machine has been used for a long time, it is better to replace it, because not only a few gears, but also the transmission belts and drums are aging, so it is worth replacing them.

According to the model of this machine, it seems that the time will not be short.

Civilian-grade walking cameras generally take less than 2,000 hours to complete the test, so I still recommend replacing them