982 driveshaft
 

I've got to rebuild the driveline in my 982, including the driveshaft. What type of material are you guys using. I'm thinking 4140 pre-hard, or would I be better to just use green 4140? Also have heard of some folks using stainless, what grade? Any known failures from using something too hard?

I used plain CRS when I eliminated the rear Flex Disk on the 782, milling a key-way in it for the 3 jaw coupling.
I don't know what the long term results will be, but @ over 400 hours I see no problem.
I really like the true-ness of the coupling over the worn flex joint.
If the need arises to remove the drive-shaft, just loosen the set screw on the front half of the coupling and slide the coupling forward, no need to drive out any coiled pin, or unbolt the flex disk.

How about a couple pics of the 3 jaw coupling that you used.

They are on here, I posted them about 3 years ago
it is a "Boston" brand I just happen to have a few in my buckets of parts.

I use 4140 pre-hard for any driveshafts I make. it holds up in my puller. that's over 80 hp. don't use stainless

George

Thanks for the help, your the best. No I am not going to try to dig through 3 years of your post's t find the info. Hope I can help you in the future.

Mac

Thanks for the comments. I'll probably go with pre-hard 4140 since I have easy access to it. If I think about it, I'll take the old one to work and check the Rockwell on it to see how hard it is.