Author Topic: W11x W108 Drive train noise when turning left  (Read 2308 times)

bracurrie

  • Full Member
  • Regular
  • **
  • USA, TN, Nashville
  • Posts: 88
  • The SL to have is a 113, but I don't have one.
W11x W108 Drive train noise when turning left
« on: May 27, 2021, 03:32:42 »
At speeds under 60 mph there is no noise with any maneuver. From 60 to 80 mph when turning left somewhat hard, like on an expressway exit or flyway, but not so hard its uncomfortable to passengers, there comes a grinding noise from the center of the car seemingly behind the transmission. IF you cruise at 80 plus mph for ten minutes or so you can just wag the wheel lightly turning the car to the left and the same grinding noise comes from the center of the car seemingly behind the transmission. I've been advised that it could be the right rear axle bearing.
Any thoughts?
All suspension rubber including mounts are less than two years old.
1970 280 SE W108.018
M130.980 w/ US emissions
manual column shift

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7053
  • 614 312-2865
Re: W11x W108 Drive train noise when turning left
« Reply #1 on: May 27, 2021, 04:53:47 »
It could be the rear trailing arm mounts, or the center differential mount (in the trunk). On the trailing arm mounts, check to see that the center metal disc is not contacting the trailing arm metal.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2006 Mercedes Sprinter Van
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

bracurrie

  • Full Member
  • Regular
  • **
  • USA, TN, Nashville
  • Posts: 88
  • The SL to have is a 113, but I don't have one.
Re: W11x W108 Drive train noise when turning left
« Reply #2 on: May 30, 2021, 13:47:54 »
Thank you Joe for the suggestion. Your wisdom and insights have always been a great help.
The trailing arms look OK. If that had been the problem wouldn't it have shown itself even at lower speeds?
The tightening torque on the center diff mount and the left right alignment strut have not been verified.
BTW I had the occasion driving the car yesterday when I choose to aggressively change lanes to the right from a standstill and the noise came for a fraction of a second as I turned the car left to align it to the new lane while under full throttle accelerating in first gear.
Brad
1970 280 SE W108.018
M130.980 w/ US emissions
manual column shift

Tyler S

  • Full Member
  • Platinum
  • ******
  • USA, CA, Encinitas
  • Posts: 1610
Re: W11x W108 Drive train noise when turning left
« Reply #3 on: May 30, 2021, 20:19:14 »
I had a similar noise in a pagoda. The parking brake shoes were adjusted too tight and would rub when turning corners.
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
2019 E450 Wagon. Majestic Blue
1936 Ford PU Flathead V8. Creme on tan interior.
1989 Volkswagen T3 Westfailia Campmobile. Dove Grey (blue)

Benz Dr.

  • Vendor
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 6862
  • Benz Dr.
Re: W11x W108 Drive train noise when turning left
« Reply #4 on: May 31, 2021, 02:11:19 »
Try turning right from now on. You'll find your way home eventually. :)
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra

BHap

  • Full Member
  • Senior
  • ***
  • USA, PA, Pittsburgh
  • Posts: 130
Re: W11x W108 Drive train noise when turning left
« Reply #5 on: June 01, 2021, 02:17:32 »
I'm having a similar noise - groaning from rear when turning left - but the noise is evident at low speeds either going straight (intermittent) or especially when turning left. From reading other posts it sounds like it would be the right rear wheel bearing.  One thing I did notice is that the noise can be stopped by applying the brakes. I did recently replace the rear brake pads and rotors so I will make sure the parking brake shoes are adjusted. Any thoughts on whether applying the brakes and getting groaning to stop would confirm or exclude the right rear axle bearing?
Bob Happe
Pittsburgh, Pa
1970 280SL, white/black 4 speed

Pawel66

  • Full Member
  • Platinum
  • ******
  • Poland, Mazowieckie, Konstancin-Jeziorna
  • Posts: 4674
Re: W11x W108 Drive train noise when turning left
« Reply #6 on: June 01, 2021, 07:30:15 »
Look, if it is "tap - tap - tap - tap..." noise while turning on the corner, I had it too. In my case I had slightly too long road wheel bolts (or sometimes they can protrude too far if your orifices in rims get too big after thousands times tightened). They were hitting hand brake shoes. I replaced the bolts with correct ones and the noise is gone.

It was easy to spot as the marks were seen on the tips of the bolts.
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

bracurrie

  • Full Member
  • Regular
  • **
  • USA, TN, Nashville
  • Posts: 88
  • The SL to have is a 113, but I don't have one.
Re: W11x W108 Drive train noise when turning left
« Reply #7 on: June 01, 2021, 14:22:19 »
Benz Dr. thank you for your kind thoughts.  As you probably know I am a road course guy not a NASCAR guy.  :P
Pawel66 and BHap, thanks for your suggestions. It's not a tap tap tap so no go there. Parking brake adjustment could be an easy thing to try.
Brad
1970 280 SE W108.018
M130.980 w/ US emissions
manual column shift

Benz Dr.

  • Vendor
  • Platinum
  • ******
  • Canada, ON, Port Lambton
  • Posts: 6862
  • Benz Dr.
Re: W11x W108 Drive train noise when turning left
« Reply #8 on: June 01, 2021, 14:33:44 »
Benz Dr. thank you for your kind thoughts.  As you probably know I am a road course guy not a NASCAR guy.  :P
Pawel66 and BHap, thanks for your suggestions. It's not a tap tap tap so no go there. Parking brake adjustment could be an easy thing to try.
Brad

NASCAR turns left - most of the time.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra

bracurrie

  • Full Member
  • Regular
  • **
  • USA, TN, Nashville
  • Posts: 88
  • The SL to have is a 113, but I don't have one.
Re: W11x W108 Drive train noise when turning left
« Reply #9 on: June 02, 2021, 13:16:00 »
I should know that, but there are many who don't.  ;D
1970 280 SE W108.018
M130.980 w/ US emissions
manual column shift

BHap

  • Full Member
  • Senior
  • ***
  • USA, PA, Pittsburgh
  • Posts: 130
Re: W11x W108 Drive train noise when turning left
« Reply #10 on: June 14, 2021, 17:20:12 »
I adjusted my rear parking brake shoes (just dragging then backed off about 4 teeth) and still have the groaning when I turn left.  Is this an indication that my bearing is bad?  The wheel spins freely and I do not hear any dragging when in the air.  On the road and going straight, there is slight noise sometimes, but always when turning left.  To me it sounds like the left rear wheel is producing the noise, which is opposite of the above descriptions.  Could it be that my left bearing is "loose" and allowing the shoes to move closer to the drum to make slight contact and produce the groan?  The right rear roller bearing was changed last year.
Bob Happe
Pittsburgh, Pa
1970 280SL, white/black 4 speed

bracurrie

  • Full Member
  • Regular
  • **
  • USA, TN, Nashville
  • Posts: 88
  • The SL to have is a 113, but I don't have one.
Further observations:
I had the opportunity to drive the car over the last several days and I tried pushing in the clutch while the car was making the noise. The noise went away. Reengage the clutch and noise comes back.
1970 280 SE W108.018
M130.980 w/ US emissions
manual column shift

alpinaltd

  • Vendor
  • Senior
  • ***
  • Spain, Asturias, Villaviciosa
  • Posts: 241
Re: W11x W108 Drive train noise when turning left
« Reply #12 on: April 26, 2022, 08:08:37 »
Brad, I have a similar noise did you resolve the issue? what was the cause ?