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#1
03-10-2011, 12:18 PM
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odd rumble 87TD on rapid deceleration
slowing quickly on downhill slopes or any rapid stopping, and the car sounds like the front brakes are grinding.
but the pads are perfect, and the rotor's are smooth. front and back. the lower ball joints do show bad signs, but I fail to see how they would cause a grinding pulsing feeling... perhaps the ABS is pulsing? I've felt many types of ABS pulsing, and it's not like any I've felt before... the wheel has no play in the bearings, and smooth noise free spinning in the air... I'm at a loss... I'll just start replacing the entire front end if I have to. any 124 experts wanna chime in with this symptom?
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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! 
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#2
03-10-2011, 12:23 PM
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I've never had pulsing on my 87, but it could be the ABS pump or system related. the ball joints will cause odd noises and vibrations as they go, thats what was wrong with mine
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hum..... 1987 300TD 311,000M Stolen. Presumed destroyed
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#3
03-10-2011, 10:53 PM
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Are you sure the rotors are not warped? That would account for pulsing, but the steering wheel would shake too.
Is this a new problem? Some of the metallic pads are very coarse, or you get to a part in the pad that is defective/ high metallic
__________________
 1987 300TD 147,000 miles- Palomino leather interior, 1995 facelift and body cladding, E350 wheels, Rebuilt suspension and sport springs, rebuilt turbo, New Monarch injection pump and injectors....and the list goes on and on...
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#4
03-10-2011, 11:16 PM
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Mine's doing that a little today, I washed it and parked it last fall with the brakes wet.
__________________
 Gone to the dark side - Jeff
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#5
03-11-2011, 08:25 AM
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it's just so odd.
normal braking, no issues. nothing abnormal on cornering, or hills push REALLY hard on the brakes, and rrrrrrrrrrruuuughhhh. it's more of a sound than a feeling... you can feel it but it's nothing like the sound... arrgh. I'll likely pull everything off, and upgrade to the 94 front rotors...
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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!
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#6
03-11-2011, 01:17 PM
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Always a good choice.
As a note, if you didn't get the '94 heat shields, you can make a flat in the bulge that was to clear the old-style A-arm and it will clear the brake rotor fine. Then opening the clearance for the rotor around the OD will keep it from rubbing. I did this on mine before I had the correct heat shields.
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Gone to the dark side - Jeff
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#7
03-11-2011, 01:58 PM
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Is it possible that it is the ABS and that the sensor or ring is dirty and not registering enough RPMs?
__________________
http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
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#8
03-11-2011, 03:42 PM
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He should get an ABS light then and the ABS would be disabled. Sounds more like a rotor or loose lug-bolts.
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Gone to the dark side - Jeff
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#9
03-11-2011, 07:53 PM
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Quote:
__________________
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!
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#10
03-11-2011, 09:50 PM
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Just to throw a bit off. What are the engine mounts like? Can you get the GRRRR accelerating in reverse?
__________________
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
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