Only have with variable speed, not just two modes.
Can it do the work you want it to do? Torque
If so and not strange sounds, smells or vibrations you may just hav not used it on high too long and have forgotten how fast is goes 
Only have with variable speed, not just two modes.
Can it do the work you want it to do? Torque
If so and not strange sounds, smells or vibrations you may just hav not used it on high too long and have forgotten how fast is goes