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 Classified Ads > Mercedes-Benz Used Parts For Sale & Wanted

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-31-2017, 09:27 AM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
Looking for 3.46 W123 diff - New England

Anyone got one laying around?

I am in eastern CT

TIA
Reply With Quote
  #2  
Old 10-31-2017, 02:27 PM
Registered User
 
Join Date: Jul 2007
Location: Upstate South Carolina
Posts: 1,124
I've got a couple W123 diffs. I'll have to look at them and see what the ratio is.
Reply With Quote
  #3  
Old 10-31-2017, 06:38 PM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
Quote:
Originally Posted by ridgerunner View Post
I've got a couple W123 diffs. I'll have to look at them and see what the ratio is.

Really trying to find something local. Unless you wanna ship it real cheap...
Reply With Quote
  #4  
Old 10-31-2017, 09:33 PM
Registered User
 
Join Date: Jul 2007
Location: Upstate South Carolina
Posts: 1,124
Oh, ok. Last time I shipped one, it was @ $25-30.
Reply With Quote
  #5  
Old 11-01-2017, 12:15 AM
Grzpdlr's Avatar
grzpdlr
 
Join Date: Feb 2011
Location: Los Angeles
Posts: 260
Quote:
Originally Posted by I6dzl View Post
Anyone got one laying around?

I am in eastern CT

TIA


Sure you want another 3.46, might be a good time to go lower. Just a thought.
__________________
Reply With Quote
  #6  
Old 11-01-2017, 08:09 AM
Registered User
 
Join Date: Sep 2011
Posts: 563
Are the wagon rear ends the same as what you are seeking? @rwd4evr definitely has a manual diesel wagon he is parting with a 3.46 rear end.


Sent from my iPhone using Tapatalk
__________________
Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,
Reply With Quote
  #7  
Old 11-02-2017, 11:27 AM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
Thanks for the replies. After some more research, I am going to go with a 3.07 diff instead. This is for my 4spd stick 240D I use as a highway commuter.

So, if anyone in New England has a 3.07 diff they want to part with... let me know!
Reply With Quote
  #8  
Old 11-02-2017, 11:33 AM
Registered User
 
Join Date: Sep 2011
Posts: 563
Looking for 3.46 W123 diff - New England

Iíve got a few 3.07 from r/c107 cars which Iím pretty confident fit. However, if you are looking for a smaller 6-cylinder differential, and not the bigger stronger v8 differential, I donít believe weíve got any of those in a 3.07. I think all of our 6 cylinder rear ends have a higher ratio, 3.46 or higher.


Edit: I also really doubt that a 240d will be able to get out of its own way with a 3.07 in it. Be ready for some slow acceleration there. Iím guessing youíll be lucky to ever get onto the highway for your ďcruisingĒ.

I will check the EPC for a stock 240d ratio though. I honestly donít know what their stock ratio is.

Edit: in the EPC, I couldnít find any 240d ratio below 3.69. There are versions with 3.92, and even over 4 I believe. I did find a thread where someone says for the last year of the w123, they did a 2.88, but that doesnít seem to apply to the 240d.

If you do move forward with a 3.07, it will be interesting to hear how it performs. Thatís the same rear end that was used with most 4.5 liter v8 cars. But I guess it all depends on how your transmission is geared. If you arenít going with a stock MB transmission, you may be just fine with a 3.07... or maybe even with a stock MB trans. I donít know.

Edit again:
It looks like the 300d turbo diff is the bolt-in you are seeking. But thereís a significant difference between the 300d turbo and the 240d. Right?


https://**************.com/node/2588


Edit:
And this topic seems to cover someone wanting to put a 2.88 in a 240d with great resistance.
http://www.benzworld.org/forums/w123-e-ce-d-cd-td/1565495-240d-2-88-gear-rear-3.html


Anyway, you will probably need to retitle the thread or start a new one.
__________________
Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,

Last edited by fonzi; 11-02-2017 at 12:00 PM.
Reply With Quote
  #9  
Old 11-02-2017, 12:19 PM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
Looking for 3.46 W123 diff - New England

I am assuming I have the 3.69 now. I have been using this page as a reference. I actually spoke to the guy who runs that page and has a 4spd 616 power W115 I think it was? But same drivetrain and tire size with a 3.07 and he said he would absolutely do that swap again over the 3.46 I was considering.

http://mbturbo.com/gear-ratios/

All stock drivetrain in my car. If it sucks, I will find a 3.46 to put in it.

Also found this post, Kent said he has done a 300D turbo rear (so should be 3.07) end swap on many 240Ds and he doesnít seem to feel the loss on the low end outweighs the lowered highway.



I have tweaked my IP a bit and bumped timing. The car feels very strong (for a 240D ) right now on the highway from 50mph on up in 4th. Truthfully, I would swap a 3.27 but it doesnít seem like that is something Iíll realistically be able to find.

I have found very few people documenting their experiences after the fact with a manual trans 240D and rear end gear changes but the few I find are happy with 3.07s. I planned to write a thread up after I made the swap.
Reply With Quote
  #10  
Old 11-02-2017, 07:41 PM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
Local guy is dropping off a 3.46 diff for me Sunday morning... with any luck, Iíll be commuting Monday morning with it.

I will report my findings
Reply With Quote
  #11  
Old 11-03-2017, 08:41 AM
Registered User
 
Join Date: Sep 2011
Posts: 563
Quote:
Originally Posted by I6dzl View Post
Local guy is dropping off a 3.46 diff for me Sunday morning... with any luck, Iíll be commuting Monday morning with it.

I will report my findings


So you decided to not go for the 3.07?

I did read up a little, and can see that the 3.07 is doable, but it could be a little harder on the clutch if youíve got to feather it more often getting started up a hill or something.
__________________
Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,
Reply With Quote
  #12  
Old 11-03-2017, 08:50 AM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
After driving home on the highway yesterday from work and understanding that my RPM at 58 would now be my RPM at 70, Iím not sure it will have the power to do anything but cruise on flat ground. Itís somewhat hilly around here.

I will make a thread and report back after itís done. If it seems like there is no issue, maybe Iíll hunt for a 3.07 diff to swap.
Reply With Quote
  #13  
Old 11-03-2017, 09:48 AM
Registered User
 
Join Date: Sep 2011
Posts: 563
Looking for 3.46 W123 diff - New England

Cool. Hearing that youíve got hills, itís possible you would have ended up cooking your clutch quickly. Itís possible we will never know. 3.46 seems like a pretty good all-around ratio.

My 1985 280sl has a 3.58 and it will get up and go, but itís really not like the 3.69 that was in my 1981 280slc 4-speed. I found myself often trying to shift into a non-existent 5th in the 3.69 with no OD. Here are the ratios.


While with the 3.58, I find myself very often running in 4th on the highway for the extra power. Here are the ratios on that car:


I notice the slower acceleration in all the first four gears with the 3.58, and that 2.91 final OD ratio just doesnít seem to have the guts, even with the m110 185 HP motor. Sure, I will eventually get past people on the highway, but it is laborious in comparison to todayís cars. This may be why I find myself leaving it in 4th quite often.

The 3.58 1:1 is pretty comfortable for cruising, more-so than the 3.69. Thatís with the nicely revving m110 DOHC gas motor. I donít know whether the diesel feels like it would be ready to shake itself apart at higher RPMs (not having ever driven a MB diesel).

In any case, Iím going to say, 2.91 is too low (and notice itís not much lower than 3.07). 3.69 is not horrible, but certainly leaves me wanting a lower gear. 3.58 is pretty damn nice.

Iím thinking you will be pleased with the 3.46.

Hopefully you wonít find yourself having to go to third (1.45 probably) very often. Thatís the equivalent of 5.00 with a 3.46, the same as the 3rd (1.398) in my 1985 280sl 5-speed. Itís not so insanely high that you wonít use it for passing, but hopefully you wonít find yourself ďliving thereĒ because it would defeat the purpose. You might ask yourself how much time you already spend in 3rd gear with your current 3.69. If itís a lot...

Maybe get your hands on a 5-speed 717.4xx transmission which will probably have ratios like mine. Or just get a 300D turbo motor.
__________________
Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,
Reply With Quote
  #14  
Old 11-03-2017, 04:33 PM
Registered User
 
Join Date: Feb 2014
Location: Eastern CT
Posts: 62
Looking for 3.46 W123 diff - New England

Most of my driving is between 55 and 75mph. Power feels pretty good for highway cruising and maintaining speed on grades right now between 60-65. Iíd prefer to cruise a little lower rpm at 75 without sacrificing too much of that power so I think a 20% gear drop is too much. I think 3.46 will be a good compromise. 75 is about the fastest I drive, rpm will drop from 3720 to 3488 with the 3.46s.
Reply With Quote
  #15  
Old 11-03-2017, 04:39 PM
Registered User
 
Join Date: Sep 2011
Posts: 563
I agree!


Sent from my iPhone using Tapatalk
__________________
Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:12 AM.


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