BOSS stepper driver transistor

I lost one of my Z axis drive transistors. Probably because I am
running a 208 volt machine on 240v. I found a tap to lower
the voltage to all the electronics except the 3 phase transformer
that powers the steppers. The other two axis have been running
like a charm at 240v.
The original transistor is a STA 7018. This crosses to a NTE 165.
I have
some 2N3055's handy. They are MUCH more hardy than the original
transistors. Maybe by 10x in the power dissipation department.
Can I use one of these? It exceeds the ratings of the original
in every category. Suprisingly, all the transistor date codes
on the machine match the time of manufacture. I thought these
things were supposed to pop like popcorn?

Thanks,
Scott