My '87 300TDT has a bad rear axle. I found a complete rear end assembly locally from a 1995 E320 wagon. Both wagon models have 2.65 differential ratio but '87 has a 185mm differential case while '95 has a 210mm case. Does anyone know if the axle from the E320 wagon will work on my '87 300TDT?

210 mm and 185 mm represent the physical size of the gear, the case will be taller if the gearing ratio changes but should be the same width. Check the yoke too to be sure its the same.
DDH

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

I suspect it will not bolt in.

I know the driveshafts are different between the two cars. I actually tried to swap them, 87 300D into 95 E320 wagon.
IIRC, the manner in which the axle attaches to the pumpkin changed from early W124 to late.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

Yes it should work. BTDT. We had a 95 donor wagon available but its diff was also bad due to the car ingesting a chain link fence.

We ended up using the diff from a 93 300D-2.5. Had to mix and match drive shaft halves to get it to work.

http://www.peachparts.com/shopforum/diesel-discussion/348451-ok-w124-rear-bearings-bear-replace.html

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

Thanks for all good information! Sounds like the drive shaft could be an issue if I try to use the E320 wagon complete rear end assembly.

By reading jay_bob's post related to W124 rear bearing it appears the axle shaft from W211 E320 would work on my '87 W124 300TDT as well, in Part No 210 350 84 10. Local LKQ yard has a 2002 E320 which seems to share the same axle shaft part No. I will check it out.

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1987 300TDT (the "Indispensable")
2005 E320 cdi (Perlite Gray, 234,000 miles)
2005 E320 cdi (Brilliant Silver, 114,000 miles)
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Gone but not forgotten:
1982 240D 4-speed manual
1987 190D 2.5 Turbo
1991 300D 2.5 Turbo

I still have mine... i could check the yoke spread measurements...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!