Quote:
Originally Posted by psaboic
Correct me if I am wrong. I was in a discussion with another MB enthusiast today and was discussing my current differential issue. I mentioned that outside of possibly different ratios, 300D/TD/CD differentials interchange, as well as 300D and 300SD/SDL differentials. In fact, they have the same part number for the differential case, cover, etc.....
They told me I was crazy....
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Yeah, just as long as the gear ratio is the same, it should fit (unless it's a second generation W126 which uses a different mounting configuration). Some people like to upgrade to a taller gear ratio, though. The differential in my 1980 W116 300SD came out of a 1981 W126 300SD. There are different widths of differentials which require different axle shaft lengths, BUT that seems to have more to do with the gear ratio than the chassis. Axle shafts are different lengths between the W123 and the W116 and W126 as they have a wider wheel track.
Also, the breather valve is mounted at the top of the differential cover. To remove it, you just need a 17mm wrench, I think. I think it also has tapered threads and no crush washer. You can clean it in diesel/biodiesel/degreaser and blow through it from the bottom with compressed air until it flows freely.
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DON'T MESS WITH MY MERCEDES!
1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles