I've gone a little further with my assault on stiffness and uneveness in the steering. I've put a new flexible section of steering column on.
Although the old one felt OK when it was on the car, once it was off the problem became apparent. If it is flexed to full extent the bottom joint can be made to lock up solid. Feels a bit like the effect you get if a roller has broken up. Once the new one was on it all felt better, so I've got rid of the grunchiness (which seems to have been in the top bearing of the steering column) and the uneven feeling, which must have been the bottom universal joint. Plus the flexible rubber joint was looking a bit perished, so it is better to have a new one on. I think I'm nearly MOT ready now.
Although the old one felt OK when it was on the car, once it was off the problem became apparent. If it is flexed to full extent the bottom joint can be made to lock up solid. Feels a bit like the effect you get if a roller has broken up. Once the new one was on it all felt better, so I've got rid of the grunchiness (which seems to have been in the top bearing of the steering column) and the uneven feeling, which must have been the bottom universal joint. Plus the flexible rubber joint was looking a bit perished, so it is better to have a new one on. I think I'm nearly MOT ready now.