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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-16-2016, 10:25 PM
Registered User
 
Join Date: Oct 2005
Location: Knoxville, TN
Posts: 302
W123 differential failing? Odd vibrations under load

Hello everyone, laying in bed awake pondering things I need to address on my cars (do you all do this top or is it just me), and this one is bugging me.

I have consistently had a vibration in my grey 300d, it is most noticeable around 35-45mph, under load. Let off the throttle and its gone, push the clutch in and its gone. Did the same before i swapped the trans, it seems more noticible with the 4 speed, but I'm thinking thats because of a more solid power transfer to the diff.

If I jack up one wheel and put it in gear and let it idle, there is a rhythmic clunking noise from the wheel that isnt lifted, and the axle shaft of the wheel on the ground seems to wobble where it enters the differential.

Am I looking at a new diff soon or am I barking up the wrong tree?

Thingsn Ive replaced hunting for the vibration:
Trans mount
Front flex disc
Center carrier and bearing
Rear flex disc
Rear axle shafts
Diff output seals (they were leaking, and may still be after replacement)

Should I start looking for a diff?
I'll try to get some video of what im trying to explain, I pro ably shouldn't try to post logical things late at night
__________________
1982 300D (w123, "Grey Car")
1982 300D (w123, "Blue Car")
2001 Ford F150 "Clifford" (The Big Red Truck)
1997 Dodge Ram 2500 12V Cummins
1996 Dodge Ram 2500 12V Cummins
Previous Vehicles:
1995 E300D, 1980 300SD, 1992 Buick Century, 2005 Saturn Ion
Reply With Quote
  #2  
Old 03-16-2016, 10:54 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,229
With the car positioned so that the driveshaft is not putting torque on the diff. grab the input on the diff...driveshaft and see if you can wobble it up and down. More than just a tiny bit of play is not good.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #3  
Old 03-16-2016, 11:08 PM
Registered User
 
Join Date: Feb 2016
Location: San Diego California
Posts: 9
Do you know if 126 wheels will fit a 123??
Reply With Quote
  #4  
Old 03-16-2016, 11:15 PM
Mölyapina's Avatar
User title not in use
 
Join Date: Oct 2012
Location: Chelmsford, Massachusetts
Posts: 4,353
Quote:
Originally Posted by Beer Man View Post
Do you know if 126 wheels will fit a 123??
You should start your own thread instead of hijacking someone else's...
__________________
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
Reply With Quote
  #5  
Old 03-17-2016, 06:34 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,229
Quote:
Originally Posted by Beer Man View Post
Do you know if 126 wheels will fit a 123??
Generally yes. As suggested starting your own thread would be better for you. Also if you give us more information especially pictures we can answer accurately.

Welcome to the shopforum!
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #6  
Old 03-17-2016, 07:54 PM
Registered User
 
Join Date: Oct 2005
Location: Knoxville, TN
Posts: 302
Quote:
Originally Posted by t walgamuth View Post
With the car positioned so that the driveshaft is not putting torque on the diff. grab the input on the diff...driveshaft and see if you can wobble it up and down. More than just a tiny bit of play is not good.
the input (driveshaft from engine) has minimal if any play up and down, rotationally it has around 1/2 inch.

however the outputs have around 1/8-1/4 inch play in any given direction except for in and out which is minimal, they wobble all over the place.

I'd say I need at minimum new bearings for where the axles go. probably I'll see if i can locate another diff for less than an arm and a leg and put new bearings in that so i can just swap the old for the new without a ton of downtime without my car.
__________________
1982 300D (w123, "Grey Car")
1982 300D (w123, "Blue Car")
2001 Ford F150 "Clifford" (The Big Red Truck)
1997 Dodge Ram 2500 12V Cummins
1996 Dodge Ram 2500 12V Cummins
Previous Vehicles:
1995 E300D, 1980 300SD, 1992 Buick Century, 2005 Saturn Ion
Reply With Quote
  #7  
Old 03-17-2016, 09:25 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,229
That sounds advisable.
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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 01:46 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