Hi John,
I recently bought a 1655 very reasonable because of a &quot;clunk&quot; under the seat...someplace. It's a heavy metallic clunk that seems to be about every 4-5 tire revs.
When I run the tractor downhill, the clunk subsides and then starts over with a different sound as the tractor is held back by the trans. The same when the ground levels, the clunk stops and then returns as before.
I'm thinking maybe a bull gear tooth or pinion?
What I'm asking is, where would You start looking? Pull the seat/hydraulics? or try to get in from the side?

Any suggestions are appreciated, Thanx
Larry Coltrin