Hi Guys,

Hoping that someone has seen this before. I have a 91 350sdl, 200k miles.

When coming to a stop, say the last 35 mph, I get a shudder that gets much worse as I come to a stop. I have tried putting in neutral to rule out a trans issue, but there was no change. I also have a slight vibration on the highway - i know that my wheels are balanced. The tires are newish.

I know with brake discs I should have a vibration when braking on the highway, but there is none.

Has anyone seen this before?

__________________
2015 GTI
1991 350SDL with a clean body and a bunch of miles.
1984 190D with an AMG 3.6

vibration in my 90 350SDL.

I have a bad upper and lower ball joint.

They're on order and "should" solve my problem.

PK

... guide rod bushing/mount, in the body of the car attached to the guide rod on each side. most noticeable if at low speeds, you apply and release the brakes, you will feel a solid clunking from them. they are fairly simple to change with no special tools needed.

__________________
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!

thanks for the input vstech - I had checked the suspension and didn't find anything - how would i test these guide rod/bushings?

IS the the DIY?
BenzObsession.com • View topic - DIY - w126 Guide Rod Mounts, Bushings and Susp. Bushings

__________________
2015 GTI
1991 350SDL with a clean body and a bunch of miles.
1984 190D with an AMG 3.6

that's a little more in depth than is needed to JUST change the bushing... but yes that's it.
he actually pulled the entire guide rod, bushing and body mount, and changed the body mount bushing as well in this DIY...
all you need to do if it's just the guide rod bushing is loosen the bolts holding it to the body, and unscrew it from the rod, then screw it back onto the rod, and bolt it back into the body.

__________________
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!

X2
A common problem with the W126.

John, me thinks you gave the simplified no-pita description. I had to remove the mounts, press the old out, press new in, rig a safe method to pull the arm forward. Yes, unbolt & re-bolt but more effort required than it sounds.

__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

yeah, it's involved, but a press is not required, nor is a spring compressor. and you have to put it back together in the right order, or you'll be doing it twice. a set of longer bolts to pull everything back together is needed too.

__________________
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!

oh, and all this about the GRM's could be unnecessary if yours don't clunk when you tap the brakes... you could have warped rotors...

__________________
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!

X2 on warped rotors

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

wouldn't i have a vibration when braking at high speed if it was rotors?

I know that is the case with the other German in my driveway (VW)

__________________
2015 GTI
1991 350SDL with a clean body and a bunch of miles.
1984 190D with an AMG 3.6

I have always had more vibration with slightly warped rotors at low speeds also. My 300SD used to shudder when slowing down when it would downshift the trans while coming to a stop. Replacing the vac modulator made it go away.

__________________
-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)

Can you expand on the doing it twice comment?

After a 1500 mile road trip in my 350sd, I think mine are due. And the two other bushings on the bearing holder also seem to be shot.

What can be done out of order that would result in doing the job again?

Thanks!

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)