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The curve for your shock looks inverted as rebound is normally much higher than compression. Not knowing the exact method of assembly, its possible they inverted the shim stack during assembly, or the nut holding the piston and shim stack to the shock rod may have loosened which could have reduced the pre-load on the shim stack reducing the damping.
Did you have them test another shock from the same end or the car? That would be your telltale along with the test you are showing. Its highly unlikely that all your shocks wore out equally, or in pairs.
Does anyone know if these are twin tube shocks or mono tube?
David
Happy with the coil overs?
So now some more of the story is revealed. Why don't you show us the dyno reports from all 4 of your dampers? That would be interesting.
Car is at the service center. But I know I'll be happy with them. I hope to install them this weekend.
Last update. I got a call from the service center. Told me that the dampers needs to be replaced but will not be covered under warranty because I have an aftermarket non tesla approved tow hitch installed and because they don't know what I'm towing, they have to assume it is the cause of the failure. I don't tow a boat but do carry a bike hitch and a bike. I never knew these cars are prone to failure with an additional 150lb - 180lb.
They also questioned me on why I removed the dampers. I removed them to have it tested because the other 3 times I was here you guys said its normal when it obviously is not. F these guys.
F Tesla.
I highly suggest that you escalate this with regional service manager. You have well documented the problem and Tesla should fix it under warranty.
Also they should back trace where this damper came from in the assembly as a whole batch of damper could have this issue. This is not only a performance issue but a safety one as well that I am sure the higher ups would like to resolve before someone looses traction in the rear and cause an accident.
Take them to small claims court, I suspect you would win... Do some reading on the Magnuson Moss Warranty Act. Magnuson–Moss Warranty Act - Wikipedia Carrying a bike would not affect your shocks longevity and I believe they need to prove it would.
It is odd that both of your shocks are not anywhere near the same valving as the other shock the company tested with the same part number. Its pretty unlikely that you would have two failed shocks, so maybe they had a lot of bad shocks?
David
Was vibration and increased road feedback a symptom of the failed dampers on your car? Also, which aftermarket ones did you go for and what’s your impression of them?Thanks David for the info but at this point I’m beating a dead rotten horse. Tesla will pretty much do anything to find any reason to deny warranty claims.
Was vibration and increased road feedback a symptom of the failed dampers on your car? Also, which aftermarket ones did you go for and what’s your impression of them?
Glad I found this tread because my SR+ does feel softer and feels like it’s rolls more like it needs some sway bars. I know it’s not as firm as when I got it back on March 30th. Now at 9500 miles. Will look for a shock dyno in San Diego.
Fred