Let me add my research on multiple sources and looking under cars for 1st gen and 2nd gen w126 ratios..

Feel free to correct if needed.

1st Generation
Years, Model, Engine, Differential Ratio, Differential Case Size
1981-1984, 300 SD, OM617.951 3.0L I5, 3.07, 1.1 Liter
1985, 300 SD, OM617.951 3.0L I5, 2.88, 1.1 Liter
1984-1985, 380 SE, M116.963 3.8L V8, 2.47, 1.3 Liter
1981-1983, 380 SEL, M116.963 3.8L V8, 2.47, 1.3 Liter
1982-1983, 380 SEC, M116.963 3.8L V8, 2.47, 1.3 Liter
1984-1985, 500 SE, M117.963 5.0L V8, 2.47, 1.3 Liter
1984-1985, 500 SEL, M117.963 5.0L V8, 2.47, 1.3 Liter
1984-1985, 500 SEC, M117.963 5.0L V8, 2.24 LSD/2.47, 1.3 Liter

2nd Generation
Years, Model, Engine, Differential Ratio, Differential Case Size
1989-1991, 300 SE, M103.981 3.0L I6, 3.46 1 Liter
1988-1991, 300 SEL, M103.981 3.0L I6, 3.46, 1 Liter
1986-1987, 300 SDL, OM603.961 3.0L I6, 2.88, 1.1 Liter
1991, 350 SD, OM603.97 3.5L I6, 2.82, 1.3 Liter
1990-1991, 350 SDL, OM603.97 3.5L I6, 2.82, 1.3 Liter
1986-1991, 420 SEL, M116.965 4.2L V8, 2.47, 1.3 Liter
1986-1991, 560 SEL, M117.968 5.6L V8, 2.47 ASR/2.47 LSD/2.47, 1.3 Liter
1986-1991, 560 SEC, M117.968 5.6L V8, 2.47 ASR/2.47 LSD/2.47, 1.3 Liter


Originally posted here.
ideal highway cruising rpms for a 300d?



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__________________
1983 123.133 California
- GreaseCar Veg System

Well, from what I have researched, there are a couple of things that are not yet clear.

I know the 126 and 116 have a different input yoke, but it is a 100% bolt-on swap, so that isn't an issue. My question relates to the half shafts.

I know the inner CV's are different on the 116 and 126, so my question is how to address this. Would one simply use the 126 inner CV on the 116 shafts??? Or, is there another way to do it????

Thanks....Robert

__________________
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

126 and 116 yokes can be the same depending on Gas version or diesel versions.

Inner axles shafts are the same, same spline count. Each axles will fit in the other diff. I am sure you can use a w126 axle on the w116 body and vice versa.


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__________________
1983 123.133 California
- GreaseCar Veg System

I thought the sealing surface was different????

__________________
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 have a source for the pinion nut socket and a new pinion nut?????

__________________
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

Inner diameter (axle stub area) of the seal are the same. The outer diameter seal (part that gets pressed in to the case) maybe different and specific to that model year differential. So basically you may not be able to use the same part number seal that is on your w116 3.07 on your potential new to you 2.47. You may need to get a seal for a 1984-1985 500SEC/SEL or 1981-1985 380SE to fit properly on the case. The axles will seal properly regardless of w116 or w126 model.




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__________________
1983 123.133 California
- GreaseCar Veg System

Buy here... Support this site. http://catalog.peachparts.com/item.wws?sku=W0133-1641951&itempk=85881&mfr=Febi&weight=0.08



Part number for the socket is 126589020900.

http://www.samstagsales.com/mercedes.htm



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__________________
1983 123.133 California
- GreaseCar Veg System

Wow...thanks for that information. I am most grateful!!!!

Guess I will need new 0-60 and 60-100 videos once I make the swap to the 2.47:1 axle.I think the 722.120's take-off downshift to 1st will compliment the 2.47:1 axle...Robert

__________________
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

The only part of the puzzle yet to find is a 107 speedo for a 2.47:1 axle. This swap really isn't all that bad!!!!!

__________________
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

Just where exactly????? We could be diesel neighbors!!!!!

__________________
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

MB dealer. About $6 for the nut, we borrowed the socket. Otherwise you'll probably have to buy that too, or find one somewhere like northerntool.com

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

there's a 107 in my pullapart... didn't notice if the speedo was present..

__________________
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!

Yes they are , still hard to get a ticket with 240D.
I think it is the other way around . The actual drven miles are higher then the miles on the odometer show. So the actual mileage would be even better if you would not compensate for that.

Later J

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85 MB 300TD with om616 4 spd
83 MB 300TD
83 MB 240D scrapped
82 MB 240D scrapped
97 Ford E350 diesel 4x4, WVO
94 Ford E350 4x4 diesel blown head..parts car
85 cherokee diesel 2.1, 300.000, WVO
85 cherokee diesel 2.1
85 lebaron convertible, to be electric
85 lada niva 4x4 with 1.9 peugeot diesel,
72 citroen DS 5spd, LPG
77 Jaguar XJS, LPG
73 corvette 350 auto
88 MB Gelande 240 GD military
98 Ford E350 mini bus to be new 4x4 camper

If you find one with a 2.47:1, I will gladly pay for it and your time....

__________________
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