Part #: 6579 (Associated Diff Drive Rings) : This item has been discontinued

[JosephS]

This is an automated e-mail from Team Associated. You had requested to be notified when a specific item came back in stock.

Part #: 6579 (Associated Diff Drive Rings)
Item Status: This item has been discontinued

To view this item online, visit:
https://www.teamassociated.com/parts/details/6579/

I got this e-mail today confirming that the drives rings are goners.
Is there a known substitute from another manufacturer or McMaster Carr?

[ChisaiKuso]

That figures... I am glad that I never threw any of my used diff rings out.

If you have some used ones yourself, then you can remove the grooves with sandpaper.

[juicedcoupe]

Yeah, I picked up several sets a while back. Well above list price but what I still thought was reasonable.

But even though I have several spares, I still try to save any that I can. I have nine Stealth transmissions, I can't just go throwing parts away.

[JosephS]

That figures... I am glad that I never threw any of my used diff rings out.

If you have some used ones yourself, then you can remove the grooves with sandpaper.

I don't have much in the ways of extra sets because I just sanded down used rings. This was my order to just buy 5 sets of rings and have a lifetime supply.

I was hoping there was a substitution or aftermarket part.

[fbmstar]

you can try mcmaster 97022A240. https://www.mcmaster.com/washers/material~stainless-steel/id~1-2/id~0-501/id~0-502/id~0-503/id~0-505/id~0-51/thickness~0-025/

The washers I measured were ID.505" -- OD .749" -- Thickness .026"
These washers are ID .500-.511" -- OD .748"-.752" -- thickness .025"
These are made out of 316 stainless with min hardness of Rb70.

probably not as hard as the originals, but might do the job. Worth a shot at $5.92 for a 10 pack.

[fbmstar]

I was looking into hardness a little more since my previous post. I don't think the B70 is going to cut it, even though those washers are pretty much identical dimension wise.

Here's another option with C44 hardness. They are a little thinner, but these might actually do the trick. I'm no expert on hardness, but know that C58-60 is what we used to spec for all of our heat treated tools. I would think the C44 would be close enough to be useable, but might need to be replaced more frequently.

https://www.mcmaster.com/90482A432/

I'd be interested in hearing how these fare if you happen to try them out or if you find something even harder out there.

[LowClassCC]

I was looking into hardness a little more since my previous post. I don't think the B70 is going to cut it, even though those washers are pretty much identical dimension wise.

Here's another option with C44 hardness. They are a little thinner, but these might actually do the trick. I'm no expert on hardness, but know that C58-60 is what we used to spec for all of our heat treated tools. I would think the C44 would be close enough to be useable, but might need to be replaced more frequently.

https://www.mcmaster.com/90482A432/

I'd be interested in hearing how these fare if you happen to try them out or if you find something even harder out there.

I will be the guinea pig and try them. I will get them ordered next week.

[JosephS]

I was looking into hardness a little more since my previous post. I don't think the B70 is going to cut it, even though those washers are pretty much identical dimension wise.

Here's another option with C44 hardness. They are a little thinner, but these might actually do the trick. I'm no expert on hardness, but know that C58-60 is what we used to spec for all of our heat treated tools. I would think the C44 would be close enough to be useable, but might need to be replaced more frequently.

https://www.mcmaster.com/90482A432/

I'd be interested in hearing how these fare if you happen to try them out or if you find something even harder out there.

I will be the guinea pig and try them. I will get them ordered next week.

I'd be interested to hear how this works out. Even if not as good as original, a source of serviceable diff rings will help keep these cars as runners.

[LowClassCC]

I will be the guinea pig and try them. I will get them ordered next week.

Order placed. I will finish getting everything else on the car cleaned up and restored so I can jump right on rebuilding the diff as soon as they arrive.

[LowClassCC]

I was looking into hardness a little more since my previous post. I don't think the B70 is going to cut it, even though those washers are pretty much identical dimension wise.

Here's another option with C44 hardness. They are a little thinner, but these might actually do the trick. I'm no expert on hardness, but know that C58-60 is what we used to spec for all of our heat treated tools. I would think the C44 would be close enough to be useable, but might need to be replaced more frequently.

https://www.mcmaster.com/90482A432/

I'd be interested in hearing how these fare if you happen to try them out or if you find something even harder out there.

These arrived today. They were a hair thinner but well within the usable range. They are not as polished as the #6579 rings came but are still smooth. Diff feels great after putting it together. I was stuck cleaning my old balls and reusing them. It will be a while before I can run it to truly test them out. For now I am giving them a thumbs up.

[JosephS]

I was looking into hardness a little more since my previous post. I don't think the B70 is going to cut it, even though those washers are pretty much identical dimension wise.

Here's another option with C44 hardness. They are a little thinner, but these might actually do the trick. I'm no expert on hardness, but know that C58-60 is what we used to spec for all of our heat treated tools. I would think the C44 would be close enough to be useable, but might need to be replaced more frequently.

https://www.mcmaster.com/90482A432/

I'd be interested in hearing how these fare if you happen to try them out or if you find something even harder out there.

These arrived today. They were a hair thinner but well within the usable range. They are not as polished as the #6579 rings came but are still smooth. Diff feels great after putting it together. I was stuck cleaning my old balls and reusing them. It will be a while before I can run it to truly test them out. For now I am giving them a thumbs up.

That is great to know. diff rings are one of those consumables that can be hard to get around. Thanks for reporting what you found.

[Frankentruck]

I ordered a pair of RJ Speed 5752 diff rings since they were only $2.99 a set. They fit as direct replacements for my RC12L diff rings which I think takes 6579 rings.
.

[juicedcoupe]

I ordered a pair of RJ Speed 5752 diff rings since they were only $2.99 a set. They fit as direct replacements for my RC12L diff rings which I think takes 6579 rings.
.

6625, same as the 10L and six gear.

The above posts are about 2.25 Stealth diffs.

[Frankentruck]

I just started refurbishing a 2.25 gearbox and the diff rings are crumbling apart, shedding steel slivers from the edges. Time to try these McMaster Carr rings.

[guitronics]

I ordered a pair of RJ Speed 5752 diff rings since they were only $2.99 a set. They fit as direct replacements for my RC12L diff rings which I think takes 6579 rings.
.

Those aren't the same as Associated #6579 Diff Rings. They won't work on the Stealth Transmission. I think those are for the 6 gear Transmission.