Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Mercedes-Benz Performance Paddock

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-10-2009, 10:54 AM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
116 to 126 Differential swap (with pics)

I believe this belongs here, since I was going for performance

I wanted to swap something else into my 83 500SEC, over the 2.24 gear it came with. The limited slip in it was shot since I bought it, so I figured I would look for something taller as well. Originally I thought I could use one from a 560SEL, since not many people seemed to know for sure. It was offered to me for $175, including the axles and would have ABS and the Limited Slip in a 2.47 gearing. I knew the rear cover was different, but I thought all I had to do was swap the cover with my old one. After locating the document in the FSM, I realized it wasn't that easy. I did however find out that it looked like just about any one from a 107, 114, 115, 116, 123 and 126 would swap, up to 9/85. After some more research in the EPC to see what models came with what gearings, I set out to find someone parting a 6.9, where I could get a 2.65 Limited Slip from. Easier said then done though. After looking for awhile and having PM's not returned inquiring about 6.9 parts cars, I came across Pooka's post in the for sale section again for a 3.07 from a 1973 450SE. He pulled it in 1988, and iirc he said it had somewhere around 80k on it.

He sent some pictures and from what I could tell and what I knew, it seemed it would work. He sent it out and I recieved it this past Monday, and I got the bug to try to mess with it Thursday night. I decided I wanted to use my axles since the boots were in better shape and they were the flanged type. After taking some crude measurements, it semed like everything was the same size, so I started removing my old one. After getting it out and measuring everything, I was happy, it was all exactly the same sizing! Everything swapped PERFECTLY! So now my 500SEC has a 3.07 LSD, but minus ABS, which I usually unplug when doing auto-x anyways so I wont miss it too much. SLS will be next to go if we can ever get the Bilstein B8 Sprint (basically, the sport model) shocks over here.

--------------------------------------------------------------------------
Large Center Piece,
models: 107.023,024,025,026,043,044,045,046; 116.028,029,03x 126.03x,04x
The breather is located on the right on the rear axle housing. On models 126.03x/04x
the breather is located at the left on the rear axle housing starting Oct 81 to Nov 82.
The two lateral bearing caps are fastened with 8 screws. The hole circle diameter of
the universal joint flange on models 107.023/025/043/045, 116.028/029 and 126.032/033
up to Sep 1980 amounts to 90mm. On models 107.024/025/026/044/045/046 and 126.032/033
starting Oct 1980 amounts to 110mm.

Small Center Piece (with lateral bearing caps)
models: 107.022/042, 114, 115, 116.020/024/025/120, 123
The breather is located on the end cover. The two lateral bearing caps are each
fastened by 6 screws. Models 107.022/.042 and 123 are provided with this center piece
as standard equipment up to January 1981.

Small Center Piece (without lateral caps)
models: 123, 126.02x
The diameter of the radial sealing rings is larger and is provided with an alternate
spiral thread. Models 107.022/042 and 123 are provided with this center piece as
standard equipment starting february 1981.

--------------------------------------------------------------------------
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #2  
Old 01-10-2009, 10:55 AM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
Here goes nothing, this is the 116 diff and axles that came in the mail


The stock Euro 2.24 LSD in my SEC


The 116 diff in black and 126 diff in rust.




2.24



under the rust somewhere is the rating
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #3  
Old 01-10-2009, 10:58 AM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
2.24, leaking side seal


3.07, no leaks


116 axle and 126 axle flange



side by side




3.07 with the 126 axle flanges installed


Type of oil used, Castrol 75w-140, MB stocks it for the newer AMG and SLR models.

__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #4  
Old 01-10-2009, 10:59 AM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
Rear cover plates, 3.07 on the left


Rear cover bolt lengths, 2.24 on the left


pretty shiny chunk of metal


Awfully empty up there


The crazy mechanic I had do the work for me


Just enough oil


The finished product


Achtung! Special Oil tag goes here!


3.07 stamp


All done, 10pm and time to gtf home
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #5  
Old 01-10-2009, 11:47 AM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,989
Very cool and informative post. I could have really used info like this for my 86 560SL to 96 SL600 rear end swap. It appears that MB rears are not very standard, each swap is a new adventure.

May I trouble you fro three more dimensions.

1) Bolt circle diameter for the side bearing retainers for both center pieces.
2) Diameter of the 126 inner CV vibration weights. Also are these weights removable.
3) Length of 126 axle from inboard CV mount flange
__________________
To see my 129 parts for sale visit:
http://stores.ebay.com/The-Mercedes-SL-Store
John Roncallo
Reply With Quote
  #6  
Old 01-10-2009, 12:05 PM
LUVMBDiesels's Avatar
Dead on balls accurate...
 
Join Date: Aug 2006
Location: Red Lion,Pa
Posts: 2,207
John,


Great job! You just eat and breathe these things, don't ya!

Why didn't you go with the 2.47 I gave you?

Also, where on the original diff does the ABS hook up? Both cases looked the same to me. I thought the ABS sensor was on the axle flange. Am I wrong?


How does she run with the taller gears? How far off is the speedo?
__________________
"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Current
Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
Gone
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf 86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad
Reply With Quote
  #7  
Old 01-10-2009, 02:17 PM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
Quote:
Originally Posted by Roncallo View Post
Very cool and informative post. I could have really used info like this for my 86 560SL to 96 SL600 rear end swap. It appears that MB rears are not very standard, each swap is a new adventure.

May I trouble you fro three more dimensions.

1) Bolt circle diameter for the side bearing retainers for both center pieces.
2) Diameter of the 126 inner CV vibration weights. Also are these weights removable.
3) Length of 126 axle from inboard CV mount flange

John, you'll have to help me understand which parts you want, do you mind using the pics I posted and marking the spots you're referring to?

I don't believe the weights are removable- I only glanced at them when it was apart and I believe it was all one piece.
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #8  
Old 01-10-2009, 02:24 PM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
Quote:
Originally Posted by LUVMBDiesels View Post
John,
Why didn't you go with the 2.47 I gave you?
Your 2.47 was from a 420SEL, iirc- It would not work in my car, or your 300SD for that matter. It will however, bolt in to your 300SDL and of course, make it a bit slower, but should increase MPG.

Quote:
Originally Posted by LUVMBDiesels View Post
Also, where on the original diff does the ABS hook up? Both cases looked the same to me. I thought the ABS sensor was on the axle flange. Am I wrong?
You can see it in the pic showing the pinion flanges on both of them on the counter. the rusty one has a nub sticking out toward the left just behind the flange, thats where the sensor pickup is.

Quote:
Originally Posted by LUVMBDiesels View Post
How does she run with the taller gears? How far off is the speedo?
Much quicker now, I took video before and after but it came out really dark, so I'm going to redo it. 0-60 before was 8 seconds. Speedo was under before by a small percentage (55mph was really 60), but now is over by a greater percentage (50 is really 40; 100 is really 80 and 120 is about 105)
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #9  
Old 01-10-2009, 04:32 PM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,989
Quote:
Originally Posted by Johnhef View Post
John, you'll have to help me understand which parts you want, do you mind using the pics I posted and marking the spots you're referring to?

I don't believe the weights are removable- I only glanced at them when it was apart and I believe it was all one piece.
In the picture titled "2:24 Leaks" and also in the picture that titled "3:07 No Leaks", I need to know the bolt circles for those seal/ bearing housings.

In the picture tilted "116 axle and 126 axle flange", your thumb is on the weight that I need a diameter for.

I attached a picture of an axle from a 560SL. It measures ~19 7/8" when compressed from the tip of the spline to the mounting flange bolt circle where I have the pencil. I'm trying to find drive shafts that are about 5/8" shorter to accommodate that 96 SL600 rear that is in the background.
Attached Thumbnails
116 to 126 Differential swap (with pics)-dscf0050.jpg  
__________________
To see my 129 parts for sale visit:
http://stores.ebay.com/The-Mercedes-SL-Store
John Roncallo
Reply With Quote
  #10  
Old 01-11-2009, 10:30 PM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
Bolt circles- the outer diameter of the pieces as in outside the ring of bolts or??

I dont think I've got a caliper big enough to measure the weights, but I'll try. If I have to guesstimate, wil that be ok? since its already in the car.
I believe these axles are the same length- I recall a rough measurement of 21" when comparing the axles to see if they were the same length but I may have measured from a different spot then you.
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #11  
Old 01-11-2009, 11:12 PM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,989
Quote:
Originally Posted by Johnhef View Post
Bolt circles- the outer diameter of the pieces as in outside the ring of bolts or??

I dont think I've got a caliper big enough to measure the weights, but I'll try. If I have to guesstimate, wil that be ok? since its already in the car.
I believe these axles are the same length- I recall a rough measurement of 21" when comparing the axles to see if they were the same length but I may have measured from a different spot then you.
I'm trying to find out if my wheel speed sensor mounts will also work for a 126 rear with those weights. Anything over 5 1/2" would be to big. As far as the bolt circle diameter I just remembered I have a 107 rear which I know has the same construction.

Don't go making a trip under your car just for me.

Thanks JR
__________________
To see my 129 parts for sale visit:
http://stores.ebay.com/The-Mercedes-SL-Store
John Roncallo
Reply With Quote
  #12  
Old 01-12-2009, 09:37 PM
Johnhef's Avatar
Senior Member
 
Join Date: Feb 2005
Location: Frederick, Md
Posts: 4,540
well I got this pic today off the old diff, is this the dimension you wanted?

its showing 5.5 inches.
Attached Thumbnails
116 to 126 Differential swap (with pics)-cid__011209113357.jpg  
__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
Reply With Quote
  #13  
Old 01-12-2009, 11:36 PM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,989
Quote:
Originally Posted by Johnhef View Post
well I got this pic today off the old diff, is this the dimension you wanted?

its showing 5.5 inches.
Thank you John.

That means my wheel speed sensors wont fit on a 126 with those weights. I may have to make another revision for 126 owners.
__________________
To see my 129 parts for sale visit:
http://stores.ebay.com/The-Mercedes-SL-Store
John Roncallo
Reply With Quote
  #14  
Old 01-13-2009, 10:08 AM
Dee8go's Avatar
Senor User
 
Join Date: Apr 2006
Location: Arlington, VA
Posts: 7,190
Where are the speed sensors on that? Did you sand blast the rear cover or just paint it? That looks great. I didn't see your new 0-60 time. What is that?
__________________
" The market, like the Lord, helps those who help themselves. But, unlike the Lord, the market does not forgive those who know not what they do."- Warren Buffett

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
Reply With Quote
  #15  
Old 01-13-2009, 06:22 PM
88Black560SL
 
Join Date: Oct 2004
Location: NC
Posts: 2,989
Quote:
Originally Posted by Dee8go View Post
Where are the speed sensors on that? Did you sand blast the rear cover or just paint it? That looks great. I didn't see your new 0-60 time. What is that?
There are no wheel speed sensors on a 126. I'm just designing external wheel speed sensors mounts so a 5 speed 722.6 transmission can be used earlier cars. But the 126 presents a special challenge with those weights. I was tying to make as universal a solution as possible. The ones I have on my 129 rear will fit the 107 rear.

Wheel speed sensors are not required to use the 722.6 trans if you use an aftermarket trans controller like PCS. But at least drive shaft speed will need to be used and that could be a signal taken from the ABS sensor.

I do not yet have clear confirmation but I believe the 722.6 transmission will bolt up to an M117 engine if you use a bell housing from a 1996 to 1998 SL500.
__________________
To see my 129 parts for sale visit:
http://stores.ebay.com/The-Mercedes-SL-Store
John Roncallo
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 06:00 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page