The 3.07 diff in my W116 is the same width as the 2.47 W126 gen 1 diff that I have in the garage. The W126 diff also has the 'slip-in' inner CV joint and not the 'bolt-on' style found on the gen 2 W126's.

Both my W116 (3.07) diff and my W126 (2.47 diff) have vents in the same location on the main casting.

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

How many bolts on the lateral (side) covers/bearing housings, on each of the two diffs?

I forget now, but they both have the same number of bolts. I did check this, at one point, but, alas, I did not write it down. I can say that the W116 diff is marked '116' on these 'covers' and the W126 diff is marked '126' respectively...

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

If indeed, they both have eight bolts (which the 126/2.47 diff will have), then both have 210mm ring gears, and are in the same series. Other than the pinion flange, the other areas which may be different are the diameters of the stub axles in the carrier and the side seals. Remove one axle (if installed) from the 2.47 and measure those diameters. To check those diameters of the diff now installed, the rear cover can be removed in the car, a c-clip pulled from one axle, and the axle slid out far enough to measure the corresponding diameters on it.

If the 116 axles have the same diameters as the 126, and for reasons of length you decide to retain the 116 axles, the end play of the stub axles in the diff will have to be re-set. There are selective shim washers that slide over the shaft inboard of the seal surface, that are used to set the end play. The manual says: "No noticeable end play should occur; the locking ring (c-clip) should still rotate in groove."

Cool, Frank and thanks for the tip!!!!

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Both have 8 bolt flanges...

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Anyone ever measure the difference between the gas and diesel yokes????

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Here is an application chart of Benz diffs, hope this helps:

Years, Model, Engine, Differential Ratio, Differential Case Size, Ring Gear Size

R107
1st Generation mounting
1972-1980, 350 SL/SLC, M116, 3.46, 1.1 Liter, 185mm
1973-1980, 450 SL/SLC, M117, 2.65 / 3.06, 1.3 Liter, 210mm
1981-1985, 380 SL, M116, 2.47, 1.3 Liter, 210mm
1981-1982, 380SLC, M116, 2.47, 1.3 Liter , 210mm

W114
1968-1976, 230, M180, 3.69 / 3.92, 1.1 Liter, 185mm
1968-1972, 250, M114, 3.69 / 3.92, 1.1 Liter, 185mm
1972-1976, 250, M130, 3.69 / 3.92, 1.1 Liter, 185mm
1969-1976, 250C/CE, M130, 3.69 / 3.92, 1.1 Liter, 185mm
1972-1976, 280/E, M110, 3.69 / 3.92, 1.1 Liter, 185mm
1972-1976, 280C/CE, M110, 3.69 / 3.92, 1.1 Liter, 185mm

W115
1968–1976, 200, M121, 3.92 / 4.08, 1.1 Liter, 185mm
1968–1976, 200D, OM615, 3.92, 1.1 Liter, 185mm
1968–1973, 220, M115, 3.92 / 4.08, 1.1 Liter, 185mm
1968–1976, 220D, OM615.941, 3.92, 1.1 Liter, 185mm
1973–1976, 230.4, M115, 3.69, 1.1 Liter, 185mm
1973–1976, 240D, OM616.916, 3.69, 1.1 Liter, 185mm
1974–1976, 240D 3.0/300D, OM617.910, 3.46, 1.1 Liter, 185mm

W116
1973–1980, 280S, M110, 3.69, 1.1 Liter, 185mm
1973–1980, 280SE, M110, 3.69, 1.1 Liter, 185mm
1974–1980, 280SEL, M110, 3.69, 1.1 Liter, 185mm
1973–1980, 350SE, M116, 3.46, 1.1 Liter, 185mm
1973–1980, 350SEL, M116, 3.46, 1.1 Liter, 185mm
1973–1980, 450SE, M117, 3.06 / 3.07, 1.3 Liter, 210mm
1973–1980, 450SEL, M117, 2.65 / 3.06 / 3.07, 1.3 Liter, 210mm
1975–1980, 450SEL 6.9, M100, 2.65 LSD, 1.3 Liter, 210mm
1978–1980, 300SD, OM617.950, 3.07, 1.1 Liter, 185mm

W123
1977–1978, 230, M115, 3.69, 1.1 Liter, 185mm
1977–1983, 240D, OM616.912, 3.69, 1.1 Liter, 185mm
1977–1981, 280E, M110, 3.58, 1.1 Liter, 185mm
1978–1981, 280CE, M110, 3.58, 1.1 Liter, 185mm
1977–1981, 300D, OM617.912, 3.46, 1.1 Liter, 185mm
1978–1981, 300CD, OM617.912, 3.46, 1.1 Liter, 185mm
1979–1980, 300TD, OM617.912, 3.46, 1.1 Liter, 185mm
1981-1984, 300TD, OM617.952, 3.07, 1.1 Liter, 185mm
1982-1984, 300D, OM617.952, 3.07, 1.1 Liter, 185mm
1982–1984, 300CD, OM617.952, 3.07, 1.1 Liter, 185mm
1985, 300TD, OM617.952, 2.88, 1.1 Liter, 185mm
1985, 300D, OM617.952, 2.88, 1.1 Liter, 185mm
1985, 300CD, OM617.952, 2.88, 1.1 Liter, 185mm
Euro Spec
1981-1985, 300TD, OM617.912, 3.46, 1.1 Liter, 185mm
1982-1985, 300D, OM617.912, 3.46, 1.1 Liter, 185mm
1982–1985, 300CD, OM617.912, 3.46, 1.1 Liter, 185mm
1978–1985, 240TD, OM616.912, 3.69, 1.1 Liter, 185mm
1978–1985, 280TE, M110, 3.58, 1.1 Liter, 185mm

W126
1st Generation
1981-1984, 300 SD, OM617.951 3.0L I5, 3.07, 1.1 Liter, 185mm
1985, 300 SD, OM617.951 3.0L I5, 2.88, 1.1 Liter, 185mm
1984-1985, 380 SE, M116.963 3.8L V8, 2.47, 1.3 Liter, 210mm
1981-1983, 380 SEL, M116.963 3.8L V8, 2.47, 1.3 Liter, 210mm
1982-1983, 380 SEC, M116.963 3.8L V8, 2.47, 1.3 Liter, 210mm
1984-1985, 500 SE, M117.963 5.0L V8, 2.47, 1.3 Liter, 210mm
1984-1985, 500 SEL, M117.963 5.0L V8, 2.47, 1.3 Liter, 210mm
1984-1985, 500 SEC, M117.963 5.0L V8, 2.47 /(Euro) 2.24 LSD/(Euro) 2.47 LSD, 1.3 Liter, 210mm

__________________
Retired
ASE Master Car / Light Truck
ASE Master Medium Heavy Truck
EVT Master Technician Ambulance
EVT Master Technician Fire Apparatus

"Without Fleet The Pride Doesn't Ride"

1983 300SD 609K + still going strong!
1970 Monte Carlo
1994 Ford F150

Based on this chart, I have this: 1978–1980, 300SD, OM617.950, 3.07, 1.1 Liter, 185mm

And plan to install this: 1984-1985, 500 SE, M117.963 5.0L V8, 2.47, 1.3 Liter, 210mm

Yet both have 8 bolt carrier bearing flanges!

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Is there a difference in the width of these two differentials?

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Not from the outside anyways

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Cleaning it up today.

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

My W126 Differential (2.47:1) has slip in, stub-axles with a sealing surface that measues .771” in diameter. Each spider gear has a .115” shim between the gear and the stub axle. The bearing surface of the stub axle, that slips into the spider gear is .260” in diameter. The length of the stub axle extends 2-3/4” above the sealing surface.

Can someone measure these things on a known W116 axle so I can try and figure out where I am????

Thanks….

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

I think you are going to be better off measuring what you need yourself - I get the impression that shims are specific to the individual differential; because of manufacturing tollerances you'll need a shim that fits the gap you have won't you?

(Or have I totally misunderstood the question?)

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

The 'cans' on the W116 inner CV joints are much larger than the ones that came out of the W126 differential. Since I drive this daily, I can't really tear it down and measure it.

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership