View Poll Results: Drive Unit Replacement & Reasons

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121. You may not vote on this poll
  • ZERO (NO ISSUES)

    62 51.24%
  • ZERO (There's some noise but I can live w/ it)

    16 13.22%
  • 1 Due to Noise

    22 18.18%
  • 1 Due to Failure

    10 8.26%
  • Multiple Repairs due to Noise

    10 8.26%
  • Multiple Repairs due to Failure

    1 0.83%
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Thread: Drive Unit Problem / Fixes

  1. #1
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    Drive Unit Problem / Fixes

    Ok... at the risk of creating a redundant thread... I'd like to see how common this is and how many people think it's a problem. I took my P85 in for service and got a 60 loaner. Very quickly I noticed how quiet the 60 was compared to my P85... it was dead silent. It seems that a large percentage of drive unit replacements aren't "necessary" but driven by MS owners wanting that ZERO sound driving back... Personally so long as my performance doesn't suffer and my car doesn't get louder than an ICE I'm ok with a little noise...
    Last edited by nwdiver; 2014-06-22 at 01:30 AM.

  2. #2
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    I'm not going to answer the poll, since my situation doesn't really apply.

    I had the drive unit replaced at ~12.5k miles. I personally didn't notice noise, but the SC manager drove the car with me to verify my alignment concerns and he immediately noticed that the drive unit was noisy. Only after he pointed it out did I notice it. So mine was replaced for noise, but not due to me complaining.

    Since it was replaced, not only is the car noticeably quieter, but I'm also getting lower Wh/mi readings on the dash. Prior to the replacement, I was averaging ~297 Wh/mi, and in the almost 4 months since I'm averaging 284. I think a little of that is seasonality since the 297 included an AZ summer, but my lowest month on the old drive unit was 294 just before having it replaced -- so I'll only give the new drive unit credit for 10 Wh/mi -- which is about 3% more efficient. I'm pretty happy about that and do believe the noise is an indication of an issue with the drive unit -- perhaps not an indication of future failure, but perhaps of a misalignment within it causing it to be out of balance and therefore less efficient and make a hum.

  3. #3
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    I had mine replaced for failure. It made a "clunk" between regen accel and low speeds. However at any other time it was silent. This drive unit I have now. Make a lot of noise. However it's still quiet, just different noise than my other unit made. I had a service tech ride along with me and he said that the newer performance units are louder than the 60's (which I had just driven for two days) and the unit was three months newer than what my car as at the time they put it on. It as brand new not a refurb'd drive unit. So to the OP I don't know if you are hearing more noise because it IS a complete different unit. The 60 and 85 use the same drive inverter but the performance models are completely different!

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    Well.... this poll is FAR more encouraging than the last one

  5. #5
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    Quote Originally Posted by Alysashley79 View Post
    I had mine replaced for failure. It made a "clunk" between regen accel and low speeds. However at any other time it was silent. This drive unit I have now. Make a lot of noise. However it's still quiet, just different noise than my other unit made. I had a service tech ride along with me and he said that the newer performance units are louder than the 60's (which I had just driven for two days) and the unit was three months newer than what my car as at the time they put it on. It as brand new not a refurb'd drive unit. So to the OP I don't know if you are hearing more noise because it IS a complete different unit. The 60 and 85 use the same drive inverter but the performance models are completely different!
    Hey, I am also located in Seattle, and I had my inverter replaced (refurbished) for what sounds like the exact same issue! A clunk between regen and accel. After a thousand miles or so (a month) it came back. I just recently had my car returned to me, and the technician basically "torqued everything to spec" (that's what my invoice says). Well, 24 hours later, and it's starting to make the clunk again. Very annoying.

    If I picked you up, could you see if my car is making the same kind of clunk as yours was? I am worried that the service center is going to tell me it's normal, but it is NOT okay with me.

  6. #6
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    Quote Originally Posted by Jhall118 View Post
    Hey, I am also located in Seattle, and I had my inverter replaced (refurbished) for what sounds like the exact same issue! A clunk between regen and accel. After a thousand miles or so (a month) it came back. I just recently had my car returned to me, and the technician basically "torqued everything to spec" (that's what my invoice says). Well, 24 hours later, and it's starting to make the clunk again. Very annoying.

    If I picked you up, could you see if my car is making the same kind of clunk as yours was? I am worried that the service center is going to tell me it's normal, but it is NOT okay with me.
    A clunking noise is not normal under any circumstances. If your SC tells you it's normal, tell them no it isn't. It will eventually lead to a drive unit or battery replacement.
    VIN #16186 - P85, 19", tech, pano, air, MC red, black perf leather, CF decor & spoiler, parcel shelf, HPWC (available for charging - please contact me)

  7. #7
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    Quote Originally Posted by AmpedRealtor View Post
    A clunking noise is not normal under any circumstances. If your SC tells you it's normal, tell them no it isn't. It will eventually lead to a drive unit or battery replacement.
    Thank you. The tech that rode with me said something about "gear slack" in the inverter and it being a normal sound. I will be insistent until it gets fixed!

    I totally believe in Tesla and will patient with them.

  8. #8
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    Quote Originally Posted by Jhall118 View Post
    Hey, I am also located in Seattle, and I had my inverter replaced (refurbished) for what sounds like the exact same issue! A clunk between regen and accel. After a thousand miles or so (a month) it came back. I just recently had my car returned to me, and the technician basically "torqued everything to spec" (that's what my invoice says). Well, 24 hours later, and it's starting to make the clunk again. Very annoying.

    If I picked you up, could you see if my car is making the same kind of clunk as yours was? I am worried that the service center is going to tell me it's normal, but it is NOT okay with me.
    I sometimes get a 'clunk' when I first put the car in gear and touch the accelerator. Had one drive train replaced, and now a loud noise around 40 MPH if accelerating quickly (along with screen message saying to take in for service). I will find out if I get a 2nd replacement on Wednesday. Before the first one, my car shut down while going 75 MPH on the highway. Gave me a warning to pull off and reset car, so I had to get over 5 lanes of traffic without any power (other than steering / breaking). Once I pulled over and turned the car on / off, everything was back to normal, but it was not fun having everything shut down while on the highway.

  9. #9
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    No drive unit problem. Most of the comments for noise and replacement have been from P85 owners and a few from S85 owners. Do the S60 have this same kind of drive unit problems too?

    For the record when my S60 was in for 12K servicing I had a P85 loaner and I found it much noiser (and far quicker). I also found the 21" wheels and tires may help the handling big time but do not enhance the smooth, quiet ride.

  10. #10
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    Quote Originally Posted by petero View Post
    No drive unit problem. Most of the comments for noise and replacement have been from P85 owners and a few from S85 owners. Do the S60 have this same kind of drive unit problems too?

    For the record when my S60 was in for 12K servicing I had a P85 loaner and I found it much noiser (and far quicker). I also found the 21" wheels and tires may help the handling big time but do not enhance the smooth, quiet ride.
    Yes my S60 inverter was replaced due to noise. My understanding was that my noise issue was a bearing wear issue, not sure that covers all of the issues labeled as "noise". Also as a side note I don't believe there are any physical differences between the non performance 85 and 60 drive units. Based on my experience there must be some firmware changes from the factory between the two but that is the only difference between them, so any problems we see with standard 85 drive units should be more broadly applicable to the 60 population.
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