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#1
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'85 300D noise in rear on down shift
I've got an '85 300D with 254,000 miles on it. Whenever my car is about to come to a stop, I hear a "thud" sound in the rear. It sounds like it's coming from the left side. I recently had a rear left half-shaft replaced which makes me think it's not that. It almost seems like it occurs when it's down shifting right before I come to a complete stop. The car tends to jolt a bit when it happens. Sometimes it's louder than others. And no... there isn't anything in my trunk!
Thanks! Brian |
#2
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Hmmm, just replaced the half shaft on that side? that would be my first thought but....
Might also be the differential mount?
__________________
'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique |
#3
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It may be mounts but I'm wondering if it could possibly be the way the vacuum control is set up on the car. I am under the impression that if the vacuum is not right it can make the car downshift with a "thud".
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Jim |
#4
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thud
If it feels like it's in the tranny try inspecting the vacuum line to the demodulator. If the line is severed or plugged you have low vacuum and . You will know it's coming from the transmission because the down shifts can be very severe.
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