Quaif lsd
 

Ok here is the deal. I opened an account to buy Quaife lsd units and asked about the Qdf5v. It is available and able to import from the UK. I ordered one and am going to test fit it to both my abs differential and then an asr one. I did 3 qdf9v installs last weekend and one more this weekend and two more in the upcoming month. I will have to wait about a month for the qdf5v to come in and then the deal is if I can get an order of 30 units that there is a big price break. It should fit all the 210mm diff housings up to 2002 when they switched and then the qdf7v goes in. According to the epc any differential with the 210mm ring gear until then with the 2.7 to 3.06 gear ratios should have the same carrier. I am going to test fit as many differentials as possible before I do the final install in my car. I guess the question is then if this thing fits all these differentials then how much interest is there. Regular retail is 1350.00 I should be able to get the price down a couple of hundred if the 30 mark is reached. Again, this should fit everything from the w107 era cars to the w210 and 140 chassis and w129. I talked to Richmond about using spacer on the ring gears if other ratios are to be used and they said that was very doable and also I am measuring all the bearings and set up that Richmond sells for the later 210mm diffs. So far it seems as though they may bolt up within shimming range.

I'm looking forward to installing your 5-speed and LSD conversion into my 300CE when I have enough money. A project for next winter perhaps. :)

So I got the lsd in and installed it in the 3.06 ratio 210mm abs case. Some adjustment of the lash and pre load will be required. I also test fitted the asr case from a 500e with 2.82 ratio. It slid right in the case no problems. It should fit a lot of different cars. I looked in the epc for cross reference of the carrier it repl. and it is pretty much any carrier with the middle ratios from the w107 to w140 and w129 and the early w210 e55 case. I also figured out the c clips. I made new ones that snap in and out like the newer differentials.

Always impressed with the way you test out these ideas! How much would the LSD conversion cost in parts and labour?

The unit by itself is 1350.00 + shipping. The install would be about 250.00 including side seals, no bearings. I was thinking of doing swaps out for cores also. If I did a core swap it would be what ever I had to pay for the differential + the 1600.00 installed. Any bearings would be additional and a new pinion bearing would also have to have more labor. The side bearings would be labor included. This is not bad though. This would be most likely less than 2500.00 shipped. I will have to get prices on bearings and shipping on this weight to get really accurate. I can normally by differentials for less than 450.00.
Fun stuff though.

Russell, did you did a full install with the ring gear, bearings, and everything on the 500E ASR case? I'm still puzzled as to how the QDF5V can fit in there while the factory LSD does not (without modifications), as the Quaife appears to be physically less conducive to fitting compared to the factory LSD. Some photos would be great, btw!

:stuart:

Dave, I installed the assembly in a 500e asr case. I do not know what year for sure. I got it from Steve here that you have bought some parts from.
When you remove the side covers with the bearing races. The ring carrier slides straight back out of the case. Simply pull it straight out. It does not have to roll out as you have illustrated in the thread on benzworld. I will take some pictures when I get a chance. I am working late these days and it will be a few days.

Here are some shots of the different cases and the lsd in the abs case and I slide the lsd in and out the same as the stock open differential. You can see that once the side covers with the races are move out that it just slides in and out. The quaife lsd slides in and out just the same.

will this work w/ my 92 500E w/out any modifications to the ABS or ASR? Will both those systems still work?

Yes this will not cause any problems with asr or abs. It simply replaces the spider gear assembly with the quife carrier. Speed sensors are not effected.

What's the difference between the QDF5V and QDF9V models? A user on another forum has the latter for sale:
http://www.mbworld.org/forums/engine-performance/356570-f-s-quaife-lsd-qdf9v-12-bolt.html#post4151131

The different models fit different differentials. The qdf9v is the 12 bolt large diff in the new amg models. The qdf5v and 7v are 10bolt and only the 5v will fit our differentials. The 7v fits the differentials that repl. the older ones in our cars.
I can get the qdf5v no problems though. PM me when you are ready. I can also get a diff from the salvage yard and set one up for you. The qdf9v is a lot cheaper than the other models though because of the large volume of sales for both the amg cars and the chrysler srt.

Thanks, I'll be in touch when I've saved up enough for the next round of modifications (probably winter). I'm looking at swapping in a 722.6 and 2.8 LSD but both would need to be built to handle 1000NM.

Hey guys,Iv been looking into this for some time but have held off as i wasn't sure if i had the right diff or if there was anything even available for mine,i did try contact Quaife some time ago and didn't receive a response.Can one of you give me a small rundown on what fits what? i have a W202(M111),part numbers are R124 351 30 08 and 2273193 3.46

Cheers,
Paul

That sounds like the smaller 185mm diff. There is no Quaife for the 185mm diff. I'm not sure if you can swap in a complete 210mm diff or not. You should be able to install a factory clutch-type LSD into your stock 185mm diff, if you don't want to mess with a conversion to 210mm. Dunno how long the clutch pack will last with the kind of power you are making though - kinda depends on if you take the car to the track, autox, etc.

BTW, that first part number is for the rear cover, the second number is just the serial number of the differential itself. The last number is your gear ratio (3.46). Is this a 202.085 chassis, btw? The car looks awesome. Love that dyno graph!


:scholar: