Need help troubleshooting this dilemma.
Car: "Crappy Gas Pipe" 1984 300D turbo GreaseCar. 230k
Symptoms: Originally had a loud rumble under car while coasting on highway.
After stopping and starting up again there was a vibration in the shifter (Floor Automatic) Grinding noise louder now. Shifter is shaking while in gear. drove 1/2 mile @ 1 mile per hour to get to somewhere I could ditch the car.

Things it cant be: Flex discs and center bearing replaced a year ago. Front brakes and wheel bearings are new. Motor mounts. Down pipe for exhaust.

Three Tranny shocks?: Only two, one on each side, the back/center one is missing. Must have been for years.

Is it comming form the center of the car or a corner?

I'd make sure you arent missing some flex disks bolts first then trans mount maybe.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Sounds like front right or center. Flex disc bolts are all on.

Brake pads, caliper, rotor; wheel bearings, tie rod ends and motor mounts (just cause its new doest mean it cant fail).

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

does the steering wheel shake? how are your front bushings? how are your rear axles?

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'81 300D - swapped to a 617.951 turbo motor with a 150 amp alt.

Steering wheel doesnt shake. Bushings? Would bushing make a loud noise going 3 miles per hour or stop when coasting in neutral at that speed?
Rear Axel? I'm leaning toward that why but dont know how to check it/myself(alone)

What about the rubber bushing that holds the center bearing?

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

That rubber is a year old. Very unlikely that has failed. Car is still abandond and dont have any more sick days/Vacation days left. If its the tranny I could use a bareivment day, maybe.?

Failed flex plate?

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Are you referring to engine mounts and tranny mount? Sounds like a problem to me

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For Sale: 1982 MB 300TD
1995 Chevrolet Suburban 6.5TD

Sold: 1980 IH Scout Traveler- Nissan SD33T Diesel

Yes, Baja, tranny mounts - have two of three. Center one is missing.

I was under the car today and noticed fiber like material fanning out from behind front flex disc, looking forward. I guess thats whats making the noise. Maybe caused by the lack of an aft/center tranny shock absorber?

So even if I replace the flex disc the reason the problem might be happening is because the car I bought only has two transmission mounts, not three.(Back center is missing) Car always vibrates for a couple seconds while accelerating. Does that sound right?

You should have two engine mounts and two engine shocks (right next to the engine mounts), and one tranny mounts that is in the center, under the rear tail housing.

You are seeing flex disk failure. Stop driving the car until you replace the flex disk. You are lucky that the flex disk ig giving you a pre failure warning.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Thanks for your help.
WhichTransmission Mount part # should I use for my 1984 300D turbo?
J6000-28396 or J6000-16023?

Round or oval. Cant tell because I dont have one on the car. Can anyone help me choose wich part my fit may car? 1984 300D turbo. Atomatic.

I picked the round one and it is the same as the old one. At first I thought the whole part was missing but that's just because I looked in the wrong place.
The old flex disc was difficult to get out of position it was so badly damaged. I hope I get the orientation of the drive shaft right. My helper who was supposed to label the shaft didn't label the tranny side. What are the repercussions of an unbalance drive shaft, pray tell?