I just want to clarify a few things so we can all be on a similar page.
The VP gearboxes are pretty thin walled in the ring gear stages and they are made from aluminum alloy machined from an extruded block (in order to get them that thin).
This exacerbates any heat coming from the motor plus the heat generated by the gears during normal operation plus any binding due to misalignment.
The 775pro runs extremely fast compared to the other motors of its size and that is due to the ball bearings. It reduced friction by about 10-15% over the same model with bushings. As a result, the speed will cause the VP gearbox to get a little hotter than compared with the BAG, etc. This is normal. What is not normal is pulling more than 4 Amps (at 12 Volts) while running in your hand while connected to a single stage VP gearbox.
If this is happening, then you probably have some binding in the gearbox somewhere or you do not have enough lubrication.
Referencing the user guide below should help you greatly:
http://content.vexrobotics.com/vexpr...e-20151221.pdf
If you continue to have problems and you think there is something wrong with your specific VP gearbox, then please contact:
prosupport<the at symbol>vex.com
Paul