Bought a 7700 running but tranny locked, as if it were in 2 gears. Rear gears are free and rear end is free to roll, but when running, let clutch out and it chokes down. They say it had done this before and they could take top off and free it up, but could not this time. Any one have an idea.
 

Sounds like it's locked in two gears, may have been in a bind the last time is why they couldn't get it freed, or could have a shift fork broke.
Shift top will need to come off.
 
I have the top off. All the forks look good and I can slide them easily. I don't yet have it in my head what is happening, guess I will figure it out but could use some pointers.
 

Will both shifters move and shift into all of it gears?
Will in roll if the range shifter is in neutral?
Work the shift rails and see if the shift forks move with the rail.
One of the bolts locking a fork to the rail may have come loose.
 
All the forks seem to move into neutral with the rails and you can spin the rear gears, just not the input. I can see nothing wrong, yet it will kill the engine locked so tight.
 

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