200 transmission problem

Had a very strange occurrence the other day while doing some work with my 200.   Was pulling a 15ft turbo max finishing some ground when suddenly the tractor just killed the engine and stopped in its tracks.

Fearing the engine locked up I hit the button and it started right back up and ran as good as it always did. Next is when things got strange.

I couldn’t get the shifter in neutral to begin with, it was stuck tight in third gear.   Finally I let the clutch out a couple times and rocked the tractor until I got the gear shifter in what I thought was neutral.   I moved the shifter side to side like it always does when in neutral.

When I let the clutch pedal out the tractor started moving even though the gear shifter handle was in neutral. I finally Unhooked the turbo max in the field, had to shut the engine off to get it to stop moving while doing so and drove it to the house in neutral. The speed that it moved was like it was in 3rd low range.

After I got it back to the house I drove it around some and finally got it to where it would stop moving with the gear shifter in neutral. It had a strange chatter that sounded like it was coming from the rear of the tractor and the rear tires had a slight jerk but not enough for it to move any.   

After a few minutes all the problems stopped and I shut the tractor off and let it sit while I hooked a different tractor to the turbo max and finished the field I was in.   Ran the 200 some more later and nothing strange going on at all so I parked it in the shed.

All the fluids were full and still are, I use 821 fluid only. The only other thing is that I noticed the left axle seal is now leaking suddenly and wasn’t until the transmission locked up.   

Sorry for the long post but I hope someone can give me some ideas as to what happened. I don’t have time to fix it right now but will start trying to after I get the crops planted.

Thanks for any help

What gear was you running in when it locked up?                   MACK

I was running in third gear low range when it happened, I checked the fluids in the two places between your feet while sitting on it. The one that looks like a bolt head and the other one that looks like a radiator cap.

OUCH!

What would be the easiest way to get to the plug behind the final drive? I was hoping that there might be a way to fix it without taking the axle and housing off.

I didn’t know if maybe I could get to it from the 3 point lift arm housing if I took it off? I don’t think I can get to it if I took the pto shaft out. It has a 540 only shaft in it.

This assumes that the final drive in question is actually overfull of oil. Did you check its oil level ?? Holds 2 gallons of 80/90 wt.

You'd be correct. Half way up on the axle is full.

The only other explanation to one final drive being overfull is the bull pinion seal at the top is bad. BUT, a sudden loss of trans oil into a final has (before) always been a plug problem down low. The bull pinion seal would only leak when the tractor is moving and oil is splashing against it. The plug leaks sitting still or moving. Sealer on the plug may have failed, but if the plug is in place and the sealant failed, it would be a slow leak. You'd have to ask yourself how many weeks or months had it been that the transmission oil (or final drive oil) was checked for proper levels ?? and then the problem occurred ??

The bull pinion has an inner seal (leaks tranny oil into final drive) and an outer seal (which makes the brake bands wet).