The thing is I just wanted to change the seal for completeness..... I don't think it leaks at the moment but if I put heat on it then it will ruin it.
Think I'll hope for the best at the moment as its all stripped down to a rolling chassis so no weight on it.
Once its back together I can put a ton of sand in the tub and hopefully that'll hold the wheels to the floor so I can get better traction on the nut....of course then I'll have to do it laying on my back underneath it