Took my Sure Grip apart, should I be concerned?

Tonight I dug into my cone style Sure Grip. I bench tested it before taking it apart by putting a axle in a vise, then put the unit on the axle. I put another axle on the other side, and had to use a small crowbar levered in the studs to get the axle to turn. so, it locked up fine. After tearing it apart the part of the cone that contacts the outer housing looked good, like they had not bottomed out yet. What does not look good to me is where the spider gears rest on the cones. They look like they have been hot and chattered. Sorry for the poor pictures, but is this normal?

Oh @RustyRatRod !!!!!!!!!!!!!!

All that looks fine. Those chatter marks are normal. Seen it on every one I've been into. That's a lot.

Thank you sir!!! I have taken the time to read your thread on going through these, quite helpful indeed. Everything else looks good to me. I may go ahead and clay the clearance for cone to housing just to see where it is at, but if it is good, I'll be putting this back together.

DrEamer said:

Thank you sir!!! I have taken the time to read your thread on going through these, quite helpful indeed. Everything else looks good to me. I may go ahead and clay the clearance for cone to housing just to see where it is at, but if it is good, I'll be putting this back together.

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If it was mine, I would go ahead and mill about .030" off the cone ends and shim it about .030" on each side. It's already apart. Honestly though, it looks good.

I had one that wore down and bottomed out. I ground off the end of the cone and shimmed the other side.

The inner surface of the cone in pic #3 looks bad. Metal was tearing at one time. The side gears can be smoothed over with a new flat grinding stone. Your goal is to remove the 'mountain tops', not to make the entire surface completely flat. These surfaces act as a bearing when you go around corners, hence the need of the additive.

The inner cone surface could be cleaned up on a lathe if it is soft enough. But, it is difficult to hold without a special fixture/faceplate. A smaller piece of stone can be worked in the cone to smooth off the high spots. This may be good enough. Clean/solvent wash the parts and wipe with a white paper towel to remove ALL grinding dust/residue. Lube with black moly grease on the wear surfaces.

I'd do the clay test as you mentioned. Don't know of any spec, but .030'' to .060'' sounds ok. Others might know.

Our local dollar store had some 2 x 4 x 3/4'' double sided ones, recently. Cheap.