John Deere 350B torsion isolator upgrade

As part of working on my John Deere 350B I am modifying the flywheel to accept an older more reliable style of torsion isolator than the notoriously bad design that is failing in my 350B

[@timstewart1125]

Where did you get the new springs

[@kensinva2]

I need these springs too!

[@DillonHFM]

I think I ordered those from John Deere. Usually once I find the part number, I use google and just put in the part number. You would be surprised how often that works

[@desertrat1831]

I've got my 350c torn apart right now and was going to update also, then realized that all the flywheels are gone. I'd be curious to know if a guy could mill out the original flywheel to accept Levoy's new isolator. It would be worth it to me to spend 1500 to get the rubber one...but would it work? Expensive gamble for sure.

[@DillonHFM]

I don't remember who I was talking to about that, might have been on a forum, but I think the dimension is a bit thicker. no reason not to machine a spacer. I was looking into doing that when I found my current setup. The other option that I wanted to try was to get a splined coupler with the correct splines, and machine out the torsion isolator, press, dowel, and weld in the coupler and fresh friction material. The other thing that I found is that the spline appears to be the same as the clutch on a dodge truck. Thought about taking a dodge clutch disk and bolting it to the flywheel. Should work about the same as the setup I used.

[@desertrat1831]

@@DillonHFM I was thinking the same thing, with a regular clutch disc. Great minds think alike! haha
I actually just told Lavoy I want his part, but I guess he's on vacation so it'll have to wait til next week. A BUNCH of money like you said, but I think it's the right way to go if I can make it work. If I can't, then i'll just put it back together and hopefully find a flywheel some day. My isolator/springs are actually in great shape. Just want to do it right while it's apart.

[@DillonHFM]

Guess it just depends how many hours you put on it. If it is a weekend rig, the original setup might last a very long time, if you are more commercial, then it might be a shorter term solution. I know that the torsion isolator is a point that wears out on these machines, but if it is still good, no shame in using it. The motor is pretty easy to pull on them and it could buy you some time to find a flywheel

[@AlanBurnham]

@@DillonHFM Did you get as far as finding out what Dodge truck shares the same spline as the 350 reverser input shaft? I've seen Dodge truck mentioned a couple of places but have never seen a year or model listed.

[@DillonHFM]

@@AlanBurnham If you look up "dodge 10 spline clutch" you can look at what pops up, looks like just about all pickups from '61 to '78 had a 12" disc, a bunch of the cars had a 10" disc, and probably some others.