I took truck out and test drove it. It did great for little while. Can some one tell me how you tell if motor or esc is bad. I think it is the esc.

What does it do(or doesn't it do)?

I took truck out and test drove it. It did great for little while. Can some one tell me how you tell if motor or esc is bad. I think it is the esc.

Sorry about the repeat. It keeps going back like you unhook the batts. It is cogging really bad. I may hook the other motor back up and go from there.

Does it drive?

every now and then. You will get it to move some. The motor feels like it does not spin free as it did.

That could be a problem. Have a look at the motor. is the shaft still in its proper place? I recently had a motor that somehow had the shaft move towards the rear of the truck, which caused some drag. This is not a good thing if it is the case and could damage the controller if you run it.

That don't sound good. I in the process of putting another motor on. The one I had before i put that one on. The shaft isin right spot. It has a smell coming form it to. My opinion is changing on problem. I haven't ruled out esc. It may be bad as well.

The motor smells or the controller?

motor. The esc has an electric smell. the motor smells burnt.

It is pretty hard to burn up one of those motors. I hope you didn't bury the mounting screws into the windings when you installed the motor(that would cause some trouble).

I checked that when put it on. I had to add some washers to space back some. Had heatsink on motor to. Sh** it happens right. lol

Well, yes, Sh@# happens, but there is usually a reason for it to happen.

The motor seemed to get a little warm. Kind of hot really. I am running a heavy truck though. 18 pinion 70 on the spur. 18 cells gp3700. Truck weighed in at 14.5 pounds rtr. Weighed before i took it out. It did great for the size motor.

Wow! You were working the motor pretty hard! That is a lot of weight for the little Lehner, and tall gearing for the cell count as well. The 7xl with a lower gearing is more the motor for the beast you are running!