Problems with changing trans fluid on GT2554.
 

I changed the transmission fluid on my GT2554, and now it wont move. I even put a brand new pump BDU 10L-225 on the thing, and it still won't move. Tried purging the new pump as per instructions I found online. Still no luck. Stumped! The tractor is shaft driven so it is not a loose belt. Used all OEM Cub fluid and filter. Now what's left?

What was wrong with it to make you think it was the pump?

Because it ran for about 20 feet and quit.Thought it may have been a coincident, so I bought a new pump and installed it. You would think a brand new pump would do the trick, but no. It also made a clicking noise before it quit. Might be the rear end gears?

Don't know your machine but is it possible you ended up with and air
lock some how. When you purge the pump does it purge the whole
system? Can you pressure it up with an air hose. Just throwing idea
out there for what its worth.

Ken

Any chance you have the trans release in the release position? :bigthink:

You might try jacking both rear wheels off the floor, release the hydro, and rotate the wheels and listen/feel for something abnormal in the rear end.

Hey Ironman , how come there are no part numbers on your third photo ?
Oz

The only time I've seen an issue like this it was caused by the wrong filter.