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| Will a C-Class Diff fit a 190e? | |
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| Tweet Topic Started: Tue Oct 19, 2010 1:52 pm (2,451 Views) | |
| HARDCORE | Tue Oct 19, 2010 1:52 pm Post #1 |
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Part of things
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Hi All, My search for a shorter diff for my 2.6 has so far proved entirely fruitless - I've been offered a 3.92 from a C-class and wanted to ensure first that they are compatable. The sellers words were: "I have a 3.91 off a C class mercedes, the only difference between the 190 and C class that I can see is the sensor cable, the 190 has balance weights either side of the diff and the casing is about an inch shorter." I would really appreciate it if the combined Benz genius of this form could say if this is a go / no-go! From what he says it will physically fit but my specific concerns are half-shaft & prop length / fitment. Thanks in anticipation! HC. |
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| HARDCORE | Sat Oct 23, 2010 6:16 pm Post #2 |
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Part of things
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Nobody know?
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| Richy190E | Sat Oct 23, 2010 6:29 pm Post #3 |
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bubble bubble
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the part numbers look very simmilar but I wouldnt want to say yes or no. |
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| cossie connoisseur | Sat Oct 23, 2010 6:40 pm Post #4 |
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there can be only one ;-)
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if the part numbers are different its for a reason but mb are renowned for over engineering and changing part numbers for the slightest of differences. to be honest if noone knows the answer then there is only one way to find out! |
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| Richy190E | Sat Oct 23, 2010 6:43 pm Post #5 |
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bubble bubble
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| UKmerctechi | Sat Oct 23, 2010 6:48 pm Post #6 |
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Bitchin
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Yes it will,you need to change the backcover,output flanges to 201 parts(from old diff) Edit There maybe a compatability issue with the ABS sensor mounting hole if its a late diff. Edited by UKmerctechi, Sat Oct 23, 2010 6:52 pm.
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| khimani_mohiki | Sat Oct 23, 2010 8:28 pm Post #7 |
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Part of things
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you might be able to put the W202 diff in the w201 casing |
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| alogaparaloga | Sun Oct 24, 2010 12:23 am Post #8 |
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crazy mind
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For open differentials early W202s share same housings with W201 you have to take care of the internals though in three areas. one is the output shafts, two is the diff cover, three is the ABS toothed wheel. Number one can be sorted by machining the shafts to reduce the flange to flange distance and match the W201 dimensions, Diff cover, you can use the one from your old diff, Last one is a nightmare. if the toothed wheel that triggers the sensor has the same number of teeth then you are lucky and you have just to dismantle the diff to measure teeth. If numbers are different then you have to dismantle both diffs, take the trigger from the original diff and transfer it to the other one. In other words if you want to take the risk you can buy it and play. I did the same and bought a diff from w202 and currently I work on that to make it fit my 190. mine is a 3.64 BTW. |
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| UKmerctechi | Sun Oct 24, 2010 1:12 am Post #9 |
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Bitchin
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machining the shafts???? Why?Just change the flanges to the w201 version,easily done,remove the rear cover and the lock clips from the flange ends and remove the flanges,replace with the w201 parts from old diff. Refit the back cover from the old diff. The abs problem is the mounting hole(5mm allen bolt) is in a different position on the later diff that uses a later sensor,not overcomeable except by fabricating a new mounting or swapping the cases with the old case. If the abs sensor lines up the rotor teeth will be the same number,if not then its not worth buying the diff. Edited by UKmerctechi, Sun Oct 24, 2010 1:23 am.
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| alogaparaloga | Sun Oct 24, 2010 9:47 am Post #10 |
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crazy mind
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I do that for the flanges just to make sure that when I take my car off the road I will have a solution ready to go in just in case the output flanges of the old diff do not give me the correct flange to flange distance. As for the sensor and trigger wheel regarding sensor fitment instead of exchanging cases I would go the route of blanking the bolt hole on the new diff and then drilling and tapping and the correct distance. Easier, less time consuming, less special tools required and of course it will work. The other thing is that you have to ensure that the trigger wheel gives the same pulses as the original. |
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| UKmerctechi | Sun Oct 24, 2010 12:24 pm Post #11 |
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Bitchin
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The flange distance will be the same,i have done it multiple times. As for welding the hole and redrilling,you cant,there is not enough metal to mount the old sensor to the new case,the last one i did,i made a new mounting brkt and ground the old mount from the abs sensor.Not ideal but worked to a fashion. |
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| alogaparaloga | Sun Oct 24, 2010 6:27 pm Post #12 |
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crazy mind
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You see we both try/have tried something and we have different experiences. I found that my C180 auto diff has the ratio I want for my 1.8 201, the diff housings look identical but the flange to flange distance is different. In my case that difference is 5mm. What I know is that such modifications have to be trial and error fitted by someone first. So I cannot say/recommend such a job as direct fit/swap etc. |
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