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+--- Thread: what diffs fit a w201? (/showthread.php?tid=4916)
what diffs fit a w201? - hooblah - 09-19-2013
Im after an lsd or asd but the lowest ratio I can find is 3.07 from a cosworth. I need something like a 2.5. Is it possible to buy an aftermarket lsd or has anyone made a diff from another car fit?
RE: what diffs fit a w201? - Jetmugg - 09-19-2013
I don't know if it helps you, but a W124 diff will fit.
RE: what diffs fit a w201? - hooblah - 09-19-2013
Yes thanks. I know its possible to swap the rear cover or something and it will bolt straight in, but I think I will still require w201 ASD drive shafts.
Ive found a guy selling a w201 3.07 ASD with driveshafts, but he says it has a bit of play in it. Easy fix? Im guessing its going to be expensive...
RE: what diffs fit a w201? - raysorenson - 09-23-2013
A bit of play? As in gear backlash, fuct bearings or worn out clutches? I say run. It's not even a good ratio for diesel and the LSD part won't work with the gearing you're looking for.
You can buy a new, complete LSD carrier that will accommodate taller gears than 3.07 from the stealer for around 1000 USD, last I checked. Not bad if you ask me. If you're going to fit it to a W201 that's not a 16v, you'll need a lot of other stuff to make it work.
Check this .pdf. It should answer many of your questions. http://www.w124performance.com/docs/mb/W124/ASD_Differential_Retrofit.pdf
RE: what diffs fit a w201? - hooblah - 09-24-2013
Thanks Ray! Its a bit late now, ive already bought it lol. Im not sure where the play is until I receive it. Ive found its possible to get a 2.65 ASD diff for a 124 and im looking around for one but they seem a bit thin on the ground. I'll keep looking but in the meantime this one will have to do.
And theres no way im paying that sort of money for a diff on a car like this!
RE: what diffs fit a w201? - DiseaselWeasel - 09-25-2013
W124 wagon/sedan 250 Turbo auto & 300D Turbodiesel have 2.65 diff. But hard to find, even harder with ASD.
RE: what diffs fit a w201? - hooblah - 09-25-2013
Thanks mate i'll keep an eye out
RE: what diffs fit a w201? - mxfrank - 09-26-2013
You could add a Quaiffe torque sensing center to a 201 diff:
http://quaife.co.uk/shop/search/results/taxonomy%3A824%2C621%2C267%2C925
RE: what diffs fit a w201? - hooblah - 09-27-2013
Lol £1000? No thanks!
RE: what diffs fit a w201? - willbhere4u - 09-27-2013
Going for high speed? The w126 300sdl had 2.88 and the 560sel had a 2.47 they are very common over here but I bet they had a much larger diff
RE: what diffs fit a w201? - hooblah - 09-27-2013
Well not high speed as such, but id like a bit more of a spread between the gears, rather than silly quick acceleration. I'd also like to cruise at 90-100 without the high revs.
RE: what diffs fit a w201? - mxfrank - 09-27-2013
(09-27-2013, 01:06 PM)hooblah Well not high speed as such, but id like a bit more of a spread between the gears, rather than silly quick acceleration. I'd also like to cruise at 90-100 without the high revs.
Highest ratio of any 201 diff was the 190D turbo, which was 2.65:1, but no limited slip. I believe you would also need to swap half shafts, as there's a difference in the flanges.
RE: what diffs fit a w201? - Eric78 - 10-03-2013
The w124 250Ds were available with a 2.65 ASD diff, there are a few of these on ebay.
RE: what diffs fit a w201? - hooblah - 10-03-2013
Thanks guys!
RE: what diffs fit a w201? - swampmonkey - 10-03-2013
the w201 250td automatic came with 2.65 to.
RE: what diffs fit a w201? - hooblah - 10-03-2013
I think if it comes to it I may have custom gears made up for the diff. I reckon it would be cheaper and easier to do it that way. Still, im a long way off from there yet...
RE: what diffs fit a w201? - Eric78 - 10-04-2013
The ASD is the easiest & probably cheapest way to go, it's 30% limited slip even if you don't use the hydraulics.
RE: what diffs fit a w201? - swampmonkey - 10-04-2013
(10-04-2013, 06:03 AM)Eric78 The ASD is the easiest & probably cheapest way to go, it's 30% limited slip even if you don't use the hydraulics.
saw a post long time ago that built in an ASD diff in his w201,
he made a manual hydralic lock, like three pumps with hand = full lock,
and press of a button released the pressure, damn sweet setup.
the welded diff isnt that nice to drive, prefere the LSD, which is the only option i have driving w123s
how common is the w124 300tdt and the w201 250dt where you (starter of thread) lives?
they are high geared and with ASD. to get a quaife or custom made diff fitted in the housing must be a heck lot more expensive, and more work to.
RE: what diffs fit a w201? - hooblah - 10-04-2013
I dont think they did a turbo diesel 124 over here, and they certainly didnt do a 201 with a turbo diesel.
RE: what diffs fit a w201? - swampmonkey - 10-04-2013
hmm, found out that the w201 turbodiesels never was relaesed with right hand drive form, hence no UK...
but a w124 300tdt?
or w124 300td om606?
RE: what diffs fit a w201? - hooblah - 10-04-2013
They did a 300td with a 603, but 606 was only available as NA (afaik).
RE: what diffs fit a w201? - DiseaselWeasel - 10-07-2013
Yes, OM603 Turbo or 606 n/a in the W124 chassis. 300TD is a n/a wagon, I prefere to stick to the factory designation; resp. 300TD Turbo or 300D Turbo. To avoid confusions.
To summarise;
2.65 diff can be found in:
- 300D Turbo
- 300TD Turbo
- 250D Turbo Automatic
- 190D 2.5 Turbo
2.87 diff can be found in:
- 250TD Turbo Automatic
- 250D Turbo Manual = 3,46
- 250TD Turbo Manual = 3,67
ASD or not depends on how the car was orderd. Either diff can be had with or without ASD. The 2.65 is rare, especially with ASD. As far as I know the ring gear is different on ASD differentials, ASD can not be retrofitted to a non-ASD Differential, unless a gearset is available (I would not mix gears after they have done many miles).
W126 gears don't fit the W124/W201 diff housing, as far as I'm aware.
To fit the 2.65 from a W124 the rear lid of a 'big' (1.1l oil filling) W201 differential is required. Plus the ASD drive shafts are shorter.
The hydraulics are easy, but wiring is associated with ABS. A manual ASD switch to operate the valve is probably the easyest way to retrofit ASD. And keep in mind that ASD was never meant for constant use, but merely as a predecessor of ASR. Resp. to aid take-off in slippery conditions. The ASD unit is quite smal and weak, compared to "proper" LSDs.
Any many, many 2nd hand ASD diffs have worn out clutch discs and don't offer 100% lock anymore.