rock-rod wrote:
I don't think powering both axles will cause any binding. OTR tandem axle trucks power both axles through a common drive shaft and they don't have any issues. The tandem axles turn on a similar arc so there shouldn't be any windup in the drive line.
OTR trucks have two differentials in the front drive axle. Of course one is the regular left / right split; the second one is to split the torque between the axles.
The second differential is mounted lengthwise near the input yoke. The yoke from the drive line center drives the differential cross. The rear bevel gear is attached to the shaft going to the back yoke to drive the rear axle. The front bevel gear rides on the input shaft and then drives the pinion through a spur gear.
