RWD Engine Conversions

I asked myself the same question recently weighing up propshaft ideas for the Scimega, but in the end I decided the answer was No.

If I measured it correctly, the arc of the propshaft through the live axle's range of movement looked only to be 2 or 3mm.

If it was a simple propshaft with a UJ at each end, I'd say 2 or 3mm is too much. It's straining the UJs, the bearing for the diff flange and the bearing for the gearbox drive flange. None of these are things you want to stress in the wrong way. Propshaft failure best case scenario is you stood at the side of the road with an immobile car that needs axle repair, prop repair or gearbox repair. A lot of work. Worst case with a propshaft failure : I have visions of puréed legs or overturned cars.

I considered whether a big rubber donut would take up that 2 or 3mm length. Possibly. But then you're asking it to take up the deflection of the propshaft too. I don't think that's what the donut is designed for.

I'm having a prop professionally made, and it turns out the UJ and sliding joint can be bought as a ready made unit for making up props. (Can't remember what the engineer called it I'm afraid).
Maybe I'm being too dramatic, but a prop is one of those things you don't want to fail, in my mind.

Most prop re manufacturers will keep prop sliders in stock, BL used to use a slider that will fit between 2 fixed flanges if you have a gearbox that has a flange rather than a slider, otherwise its desirable to get the donor gearbox slider,
Performance issues can dictate a certain amount of dif flange nose down by around 3-4 degrees,