I'd want a diff that works. You have this odd mix of going to the massive effort to install a V12 a 107 but seem fearful in making simple changes. ( Like using a speedo signal fooler to compensate for a non standard rear ratio so the transmission controller does not complain.

The question is why don't you want to use it in a clutch diff? If you are concerned about too much bias at low loads, use a lighter spring.

Putting this spring block into a stock non LSD diff is a short lived hack. With a clutch type diff this is the standard mode of operation for millions of diffs.

It took me about 2 seconds to find a vid that shows exactly what I have been pitching. Marker 0:55 to 3:25 is what you want to view.

https://www.youtube.com/watch?v=WeLm7wHvdxQ&vl=en

0:55 to 3:25

Understanding Limited Slip Differential

And that is the point, a non spring shim type system does not compensate for wear but a preload spring will. Why go to the huge expense of having plates made when a spring will take care of the problem forever?



If you are trying to use a GC to id non volatile metals, you are using it wrong.

For the last 31 years, I have been a test engineer for aircraft parts and whole aircraft structures. Parts ranging from little tiny servos to 18,000 HP helicopter transmissions. I was responsible for supplier qualifications and testing to DOD standards and have seen the results of unqualified parts. The car I built has been on the road for over 10 years now being driven almost daily up until 2013 when I moved out of Connecticut and is still drive quite regularly here in NC. For the first time in over ten years it was down for about 2 weeks to upgrade the differential to one with LSD. The bottom line is that I don't build garage queens. I build robust cars that do the distance. The car has driven from Main to FL and as far west as Ohio. There are very few people who can build such a car and have the confidence to take it any further than the local car show. So when I decide to use MB developed tried and tested components over some universal one size fits all piece of equipment not qualified to anyone's standards but there own its for a good reason. Besides the tone rings and mounts I made were cheaper that purchasing two of the required speed foolers. So I ask why would anyone put substandard hardware on there car when you can get OE qualified performance for the same price.

The question is why would I want to put it in my clutch diff when my clutch diff works just fine. Like I said in post 9. This diff was not taken apart because there was any problem at all. I is just being reconfigured from an ADS diff to a standard 126 type. My stock 560SL with 166K miles has a LSD diff that has never been serviced and it works just fine. The diff that came out of the car that my V12 is in had 220K miles and it worked just fine. The 2.47 diff I got out of a junkyard to try out my wheel speed sensors and use as this diff is being prepared works just fine. I am perfectly happy with the stock MB diff performance. SO WHY WOULD I F@#$K WITH IT.

You mean the problem that I don't have.

Well probably.

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The clutch 0.020in shims have arrived. Not unexpectedly they are too thick. The reason for them being too thick is that I also ordered new spider gear washers. The new spider gear washers are steel, they are new and more than likely thicker and certainly don't squeeze as much as the plastic ones. As soon as they came in I realized my shims were probably going to be two thick. I happened to have some thinner clutch steel plates so I was able to simulate putting 0.015" shims in place of the 0.020" shims. The result was too low a drag torque. Its supposed to be 80 to 160 NM, I'm at ~ 60. So I have reordered more shims in 0.015" thick and I can make up any short fall by staking in leftover thicker (less worn) steel plates that I have from another differential.

Unfortunately these shims do take 2 to 3 weeks to get but I'm in no rush as I still need to find some axles.

Attached Thumbnails

   

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I didn't read everything from the beginning so if someone already post this, please don't mind. I thought you guys might be interested.

I found new performance clutches just posted on eBay. I know the company, they produce high performance clutch discs for various types of diffs including Lambo, Ferrari, Mustang, BMW and so on. So I believe they are quite good.

For Merc they offer following:

185mm diff:
- regular - https://www.ebay.com/itm/263704385681
- Cosworth - https://www.ebay.com/itm/264177045026
210mm diff - https://www.ebay.com/itm/264197888116
C63 AMG - https://www.ebay.com/itm/263501168729

They even offer discounts for bulk purchases.

Looks like a good set. I like the idea of the ceramic coating. Not sure how they handle the selective friction that goes against the side gear.

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Did some checking out on those clutch plates on E-bay. Needles to say I'm not impressed.

The set comes with 12 1.5mm thick clutch plates and 8 2mm steel plates.

The idea is to use 2 1.5mm clutch plates in place of the single sided selective plate. I have already found that 1 1.9mm plate will fall into the groove between the broached spline and the back face of the side gear.

It also eliminates the steel that goes against the carrier and puts the clutch plate directly to the machined cast iron surface of the carrier.

The concept was based on samples sent in by a customer that they made a set for and received positive feedback.

I'm of the opinion that the total amount of testing done on this is based on the feedback of one customers 2 or three burnouts.

I will pass.

I recently received my 0.15" shims but assembly of the diff is now on hold for a speedometer sensor installation I working on. Lots of late and milling machine chips going everywhere. I don't want to be assembling gear boxes while that's going on.

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I'll have to read through this one again, it's been awhile. I have a 3.23 LSD going in my wagon I just bought, I know it works from a couple loops at the end of my street awhile back but yet to be seen how well. I will want it pretty tight for sure. Glad you are engineering a good solid rebuild for these!!

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WARNING!!! VINTAGE MERCEDES MAY MULTIPLY UNCONTROLABLY!!! I have tons of Sl/Slc parts w108 w111 w126 and more. E-mail me with needs
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I read through again. So did you get the plates made or get a price? Also now that I see how they operate(haven't had a mb lsd apart) , even though the two fairly low mile 560sl parts cars I have wheels spin like a stock diff, you think they will lock up under load?

Sent from my SM-J737A using Tapatalk

__________________
WARNING!!! VINTAGE MERCEDES MAY MULTIPLY UNCONTROLABLY!!! I have tons of Sl/Slc parts w108 w111 w126 and more. E-mail me with needs
BirchsgarageMB@gmail.com

I never got the plates made as there doesn't seem to be much interest. I did get shims made to take up some of the wear. See post 33. Those ones were 0.020" and were too big but I also got 0.015" ones which I will try shortly after I finish some machine work.

Yes even though you wheels spin like an open diff they will lock up under load. I am beginning to think that the preload MB put on them is there to make sure they are quiet when delivered new.

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0.015" shims have been installed and seem to fit well. I think this will be a very reasonable refresh option. We will see when I get if going. Unfortunately I am now playing the shim game for the pinion and MB has discontinued all the intermediate sises which include the size I need. So that will motivate me to get my surface grinder back into action.

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John Roncallo