Hey David, welcome to Stovebolt. I don't know for sure about those axles, but I'm wondering if the "counter rotation" you mentioned might be that the pinion gear meets the ring gear over the axle centerline rather than under it which is common to most vehicles? I believe this was (is) done to help increase ground clearance. I'm not sure if this is the right answer, just conjecture on my part-I may just be blowing smoke out of my [censored]... wink Anyhoo, best of luck on your project, I'm quite sure someone here who DOES have the knowledge you seek will chime in soon enough.

Regards,
Wannabe smile

"Don't expect anything and you'll never be disappointed"