Slash 4x4 with 1520 1Y?!?!

[BrianG]

That's a LOT of torque for a smallish vehicle. Although, practically any motor will work depending on how you drive it. If you are a throttle on or off type of guy, then the drivetrain will complain, but if you can control the throttle, it should be fine.

With all that weight (motor and batts), you probably will need to stiffen the suspension a bit (stiffer springs and thicker oil).