Tranny trouble - need help with dissasembly

I'm having trouble getting the lock nut off the lower shaft on the left side of my 730. The lock nut seems to be stuck hard and I can't grab it very easy. A cold chisel won't line up and the metal the the nut is made of is quite soft making it easy to damage. I had someone tell me that a special tool for Ford truck four wheel drive front hubs might work on this. I have to get it apart because the 2nd/5th speed counter shaft gear has some fairly bad tooth damage and I want it fixed properly. My differential gear also has half of one of the gear teeth missing. I'll post another message with a picture showing the gear damage. I am looking for those parts if someone has them and wants to sell.

I have a 4x4 front hub tool I modified for some ,but most will just spin off with a punch. This buggers them up sometimes. I used to be able to buy new ones,but don't know about that anymore. They get pretty indented on the backside because most all of those lower countershafts are running around with way too much end play.

Depending on your trans. ? I have used some of the NEW repro gears with good results. I think 2nd & 5th was the one they make ?

Here is a picture of my tranny troubles. Both the 2nd/5th counter shaft gear and the differential gear have damage. Interestingly, I didn't find and shrapnel in the bottom of the case.

You need a spanner type socket or wrench. I've made them on occassion, then toss them into the tool box in case I ever run in another nut like that. Old keyway stock welded on the end of a piece of pipe works, as well as just grinding one up from scratch. Just find a piece of pipe that will slip over the shaft.

Some 4-wheel drives and trucks use those deep spanner nuts.

Here's a driver used to remove those nusts from washing machines:

Here's how I grind my own. Use a big pliers or a pipe wrench on the outside. A pipe coupling works great.

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