Hello John, I think it is possible, I remember a bloke near where I used to live, With stuff all over the street, I asked if he needed help, but he said he was fine. It might help if you tell us what's wrong. Saying that, I think it is always better to get it out onto the bench if you can, It's not too bad a job, I had to take mine out to have the back of the box welded, The alloy had broken away that holds the big spring clip, which holds the big bearing in place, I think I lost top gear and had to come home in third. Good Luck, Bill.