hey all,

I have a pretty severe vibration coming into the chassis at anything above 35-40mph. Changing the subframe mounts helped substantially, but it persists. I took the below video with the car on jackstands, you can clearly hear something balking when the drivetrain is engaged, but i'm not sure what it is. New center support will be going in soon, but the driveshaft looks like it's spinning smoothly (rubber is deteriorated, however). Flex discs are 25k old and the vibration damper has been removed.



also: I'm assuming the diff needs a new set of clutches since the passenger wheel is not engaging too well (car is a 16v - has a LSD)

Sounds like the differential or maybe the CV joints.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k

Pick up a mechanic's stethoscope, you since you already know the general area its coming from, the steth would really help narrow down the sound. I agree it sounds like a CV joint

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

Well, the CV boots look original and definitely have stress marks, so I guess I'll add that to the list of things to change in my refresh...

Alright, took a stethoscope to it just now - definitely sounds like it's the diff. that's the only place I could touch the stethoscope to where the sound was clear.

any advise on diff rebuilds?

for a "Pumpkin" Re-Build (If Needed) make it NOT a DIY type project.

Disclaimer:
LSDs and their "Clutches" are VooDoo to me.
(Along the Same path as Trying to Machine your own S.S.Propeller)

GSXR will know.

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'84 300SD sold
124.128