[Robin Craig]

Jordan,

Having worked in an automotive and heavy duty machine shop I have done ring gears many times.

It isn't rocket science, more like good old fashioned bull work with some accuracy and some speed

Having one piece of ply thick enough to exceed the thickness of the ring gear works best.

Heat the ring gear using a neutral flame on an oxyacetylene torch with a cutting tip and heat it all the way around in a circular motion.

Grab it quickly with gloves and set it on top of the ply and using oak or aluminum or brass drifts hit the ring gear a good solid whack in once place and move around the ring gear swiftly, if you have heated it good and you move fast it will move a fraction as you go. Hopefully you hit your drift with a good size hammer and with purpose.

To install on the other one you will need to heat it up all around again and fast and using proprietary tools grip it and drop it on and again if required drift it back into place as it cools.

I guess I am being glib as we did them a few times a week.

There are plenty of youtube university videos to aid you.

Have fun