LSD Upgrade for 16V + W124!
 

Tired of your worn out LSD clutches costing you traction off the line and around corners? Then this is the upgrade for you!

I've developed a spring block that installs in the 185mm diffs found in the 16V, 2.6 and many W124s. It greatly increases the amount of lock the diff produces.

Check out the ebay auction for more info:

Ebay link

http://danielandlauren.com/Benz/ForS...ng%20block.jpg

Any plans for the larger v8 differentials?

man my diff in the w124 a 3.27 ratio ASD unitis weak on the right wheel, will this kit help if i order it with the hard springs???

A number of people have expressed interest in a kit for the 210mm diffs. I'm willing to do that, but I don't have access to one at the moment. If you know of someone that has one laying around, let me know.

Absolutely. You will be very pleased with the amount of lock you get, even with very worn clutches. This kit also works in non-LSD diffs and gives you some locking, though not as much as in an LSD unit.

in the pic we can see ur kit touching the gears, have u checked if that causes wear on the gears or the kit???

The block is purposely made with a softer steel than the gears. So, all the wear will occur to the spring block, not the gears. Also, keep in mind that these gears are stationary when both wheels are turning at the same speed. They only turn when you are going around a corner, and even then they turn at a slow speed. It will be a long time before there is any appreciable wear on the spring block.

The spring blocks have been relisted. I expect them to sell out this time, so grab one while they're available!

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=250290709381

please tell me you are building one for the larger diffs found in the w202s w210s etc mine doesnt have any form of lsd at present

This is very intriguing for a non-LSD! Couple of questions....

I thought you need clutches to make this work. How does it work without them?

How much lock would you get compared to a factory unmodified LSD?..90%, 50%?

I assume this would work on any w123 3.69, 3.46, 3.07, and 2.88 ratio non-LSDs.

PM me.

I have many of the larger diff in both the 129 and 210 case.

:-) neil

Hi there. Do you have/can you make more of these spring blocks? Need them for my 2.5-16v.
Thanks

123s
 

Can they work in a W123? I have a 300D that I'd like to make an LSD.

Gotta make the 123 a LSD first, then you can add the spring block to increase lockup if desired. Converting the normal 3.07 W123 diff to limited-slip is straightforward, you just use the 190E-16 LSD internals and bolt it together. For 2.88 gears you get a 1985 300D diff, and bolt in the LSD from a 1995 E300 with ASD. Same idea, just different ratios involved. You'll still need to refresh the clutch packs along the way... plan on at least $750 for the project.

I don't think the spring blocks are available anymore, though... pretty sure he sold out the batch which was created. Dunno if he'll make any more, either.

:boat:

Yeah that would be a nice upgrade if they were still around. If they would fit my 126, I'd go for one as well.

You don't need a real LSD to make a springblock work. Phantomgrip.com will make a spring block for 500 for anyone and they are designed to turn open differential into an LSD. They have 3 grades of springs. Their heaviest lock up to 75% in light japanese cars like 240sx's(2600lbs) and as low has 40% in big heavy cars like a sl500(4000lbs).

All it does is push the the spider gears apart to prevent the open diff action.

Phantom Grip is still not a real LSD. And it's not cheap. For vehicles where there is no LSD option available a reasonable cost, yeah, it might be worth trying it out for $300-$500 (plus lots of labor to pull the diff apart, install it, etc). However for most Mercedes (including the 123, 124, 126, 201, 202, and many 129/140 chassis) there is a "real" LSD option available for $750-$1000 (cost varies depending on the exact year, model, and gear ratio). If you need it bad enough to afford an PG, keep saving your pennies until you can get the real deal. You may want to do some Google searching for PG failures... when they fail, it usually ain't pretty. MB clutch-type LSD's rarely fail, they just wear the clutches, and those are replaceable.

Johnref, there are factory LSD options for your 126. That's the way to go. A spring block (as shown in the first post on this thread) adds extra lockup for race purposes, but isn't really needed for street use. The spring block is far more effective when used in an LSD than in an open diff.

:stuart:

The car is rarely driven other then to track events or the shop. It currently has a 3.07LSD in it.

Ooooo, nice. You could have someone fabricate a spring block to work with your 126 (210mm) LSD carrier, it would just be a little larger than the one shown in the original post for the 185mm carrier. But you still need to remove the C-clips which lock the axle flanges into the diff - probably not a concern on a track car, though. Have you ever replaced the clutches in your LSD? If they're original, I guarantee they're overdue for a refresh... a new clutch pack might provide the improvement you're looking for, even without the spring block.

:boat:

Well, its freshly installed about 2 weeks ago (see http://www.peachparts.com/shopforum/showthread.php?t=242313), I'm curious as to how much lockup its going to provide, auto-x season starts in April so I'll get my first chance then to try it out. The clutches in the 2.24 LSD the car originally had were worn out (tons of play with the flanges) and instead of replacing them, I opted for a different LSD gearset.

I love how the car accelerates with this one in it now. I only need one of two things now.

A) different gearing for 4th gear
B) different trans with more gears ;)

A) UH, well, your option there would be to drop back to a 2.86 or 2.65 ratio, lol.

B) I know a guy who can install a 5-speed 722.6 into your car, and program a standalone controller, but it will be about $5-6k out the door (I believe that includes labor, installation, tuning, and a used 722.6 tranny). In that trans, 4th gear is 1:1, and fifth is an 0.82 overdrive (I think). It's the perfect tranny - except for the cost.

C) I'm willing to bet that you find the clutches are worn out on the donor 3.07 diff, but you won't know for sure until you try it out. For autox use, you may need a custom spring block as shown in the first post on this thread. The factory LSD is better for street use than for race use, IMO...


:batman:

The 722.6 is a perfect tranny for the older cars. It has as you say over drive plus a user selectable 1'st gear start (W/S) modes and a lockup converter. It would allow the use of a 3.07 rear with highway cruising RPM of a 2.47 rear. It really would be a nice upgrade. One of the first things I would like to do is start to experiment with the PCS controller after I get my current 722.6 running. I think it could be done for about $2500 to $3000 in parts including a used trans, controller, shifter, wire harness. I believe you could use your old drive shaft.

haha thanks, I will definitly keep that in mind. I'm sure I can get a 722.6 for nothing or next to nothing if I keep my eyes open. The clutches on the 3.07 sem to be in pretty good shape still, the donor vehicle had about 80k on it, and all I can tell so far is that this one actually works over my old one, but yes the first ax will show how well it works. I've got a drag event and a day at summit point before the first ax though.

It should do fine at the dragstrip, not sure about a road course, and autox is probably the most difficult test. What were your dragstrip numberrs with the 2.24 gears, btw (esp. the 60' time)? It will be interesting to compare with the 3.07 gears!

:1eye:

At the last minute, I decided to leave the car at home last November when I last went to the dragstrip, and I regretted it.
Best 0-60 prior to the swap was 8.0 seconds, thats the only measurement I took.

Kits available again!
 

Hi guys,
I have a few more sets of these LSD spring block kits available again!

It fits the 185mm diffs found on the 16V and W124s. It fits both regular LSD and ASD diffs. (Note: ASD must be disabled if the spring blocks are installed.)
The kit is available with both standard and heavy duty springs depending on how much lock up you're looking for.

See this writeup at 190Rev for an example of an installation.

The pricing info again is $200 for the kit + $10 for US shipping. Extra set of springs is $25. If you're international, PM me with your address for a shipping quote. Most of the time it's around $25.

PM me if you're interested.