Hydrostatic Drive shaft, rubber disc

[clint]

Any idea what the rubber disc on the drive shaft coupler are made of ( I know rubber) on a 1450 ? I have been searching to no avail , I am in the middle of modifying my drive shaft, going to use a u-joint for the rear, and the "rag joint" coupler (factory) for the front, I want to replace the rubber disc, the back are in good shape, I suppose I could move them to the front, however if I could find the correct material cheap enough I had rather replace it. I think I have this right in my head on how it should/needs to be done, u-joint in the rear on the hydro, and factory coupler in the front, with provision/modification for easy removal if ever need be in the future. I have not settled on a u-joint yet, I have seen the one used by Dave Kamp, however I may go a different route if I can find a slimmer u-joint geared more to industrial type transmission cheap enough and bore, or sleeve for the shaft. Granger has what I would like, but price is way out of line, this is what I would love to use though, however it's only rated at 1750 rpm, the needle bearings rise as sharp in price as they do speed.



I have stainless bearing shaft already, just need to get the u-joint, plastic fan because mine is shot ( was going to use an aluminum fan, however changed my mind of direction from a member about why the plastic fans break, and aluminum might damage something else of it came in contact with something)

The rubber almost looks like a tire, been checking mcmaster etc, just not sure what it is, and I was hoping someone may have been there done that.

Thanks, Clint