Wagons and V8 sedans share the same wheelbase but the V8s use a different center support setup which makes them incompatible AFIK. I haven't messed with a V8 DS so I don't know for sure. You should ask on the 500e forum.

What exactly are you trying to do?

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Put a V8-ish driveline in a w124 wagon.

The only 2.65 210mm diff that will bolt into a w124 that I know of is from the early 90s 500sl.

That diff requires shorter axle shafts, because it is a wider diff.

Those 500sl axles have beefier inner spiders, which is good.

The 500sl diff has a four bolt flange, which seems great, because the guibos are eight bolt rather than six. But it doesn't match the stock driveshaft.

So I either need a v8 driveshaft or exhange the flange for a weaker 3 bolt one (weaker seems like the wrong direction to go).

Anyway that's what I'm up to. It's a 606 compound turbo deal.

Maybe I can work out a way to mate the stock front half with a V8 rear half. Doesn't sound like it from what you wrote earlier, though =:-(

Wonder how the spline count and diameter at center support compare from 300td to V8.

The 94-95 e320 has a 210mm 2.65 diff with the larger 3 bolt flange which matches the 87 diesel.
http://www.benzworld.org/forums/attachments/w126-s-se-sec-sel-sd/2369257d1517879088-w126-gen2-3-46-lsd-diff-diff-ratios-w124-w140-r129.pdf

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Well OK, but I already have the 500sl diff and half shafts.

if the rear driveshaft is the same length in the wagon and sedan, why not just put a new center bearing in and a v8 front driveshaft also? The transmissions are both 722.3. All I would need to do is buy an e420 driveline from ebay and change the output flange on the transmission to 4 bolt 129-272-04-45. Then I have 8 bolt 110mm guibos, more splines, larger driveshaft, 210mm diff and larger half shafts.

Seems hard to believe the center bearing mount is a different bolt pattern, or that it would be in a different location if the rear driveshaft is the same length.

Um, I also have to point out that the 94-95 e320 diff flange does NOT match the 87 diesel. The 87 is a 3 bolt flange, but it is smaller than the later 3 bolt flange which came on later 124 cars.

Thanks,
Karl

No, this is incorrect. You're thinking of the 300e. The 87 300d uses the same flange and flex disk as the 94/95 E320.
300D is the one on the right.




Also the flange is easy enough to swap by removing 1 nut.

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Yes not a huge deal either way, as the splines for all of them are the same.

But if you look on the chart you linked to, you will see that the 87 TD had 126-350-14-45, whereas the 1994 e320 used 211-350-00-45. Matt at Leistung told me this also. Apparently, all the early cars used a smaller 3 bolt flange than the later cars did.

Was the 300d shaft you posted from an early 300d, or a later one? I'm sure they were using the larger flange for the 606 car in 1995, for instance.

Sent from my SM-G955U using Tapatalk

The one I posted is an 87. The 87 300D and 94/95 E320 use 110mm flex disk. The 260e/300e/2.5D use 90mm flex disks. The PN difference you saw is only in the thickness of the flex disk but the flange is the same.
Reinforced guibos

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Just following up on this.

The V8 w124 rear driveshaft is shorter than the 87 diesel wagon rear driveshaft.

The splines for the v8 and the 300td front and rear are the same where they connect at the center bearing. So one can easily mix and match to suit.

The issue with using a v8 diff in the diesel car is the transmission flange will only fit the 110mm discs, which are 3 bolt. The v8 uses the 4 bolt flanges, which will not fit the 300td due to interference with the transmission mount nut.

So you are either swapping a diff flange or the flange on the rear 300td driveshaft, or lengthening the rear v8 driveshaft, to use the 210mm diff in the earlier cars. Swapping flanges requires swapping seals presumably, and re-torquing the pinion nut (not too tight to avoid messing up the crush bushing).

Working my way into the swap and I think the part about the rear DS length being dictated by wheelbase only is incorrect. The V8 cars have the center support bearing mounted further aft than the earlier cars. The smaller 185mm (or whatever) diff used in the early low power cars is also shorter than the 210mm diffs of the later 6cyl gas and v8 w124 cars; the snout on the 210 diff sticks out a couple of inches further forward than the small diff.

So you have to look at the engine the car came with as well as the other factors mentioned above.