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Whining noise from front motor on my 2022 R1T

0

Mike T. · rep 0 · May 25, 5:05 AM · 1 replies · solved · Question

Vehicle: 2022 Rivian R1T Quad-Motor

My 2022 Rivian R1T Quad-Motor has developed a noticeable whining noise coming from the front end, specifically when accelerating or regenerating at lower speeds (under 40 mph). It's not a tire noise, and it wasn't there before. It sounds almost like a high-pitched electric motor whine, but it's much louder than normal.

It's been getting progressively worse over the last few days. I'm concerned it might be one of the front drive units. The truck still drives fine, no warning lights yet.

Has anyone experienced this specific type of noise? Is it indicative of a motor bearing issue or something else?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 5:05 AM

0

ClearTheCode admin answer:

An unusual whining noise from the front of your 2022 Rivian R1T, especially when accelerating or regenerating at lower speeds, is a clear indicator that something is amiss with one of the front drive units. While EVs are generally quiet, any new, distinct mechanical noise should be investigated promptly.

Common Causes:

  1. Motor Bearing Wear: The bearings within the electric motor or the reduction gearbox can wear out over time, leading to a high-pitched whine that changes with motor speed. This is a common failure point in electric drive units.
  2. Gear Reduction Unit Issues: The single-speed gear reduction unit connected to the motor can develop problems with its gears or bearings. This would also produce a mechanical noise, often a whine or hum.
  3. Inverter Noise: Less common, but sometimes the high-frequency switching of the inverter can produce an audible whine, though this is usually more subtle and less likely to worsen progressively like a mechanical issue.
  4. CV Joint/Axle Issues: While typically more of a clicking or clunking sound, severe wear could manifest as a whine under load, though less likely to be mistaken for a motor noise.

Diagnostics:

While there might not be an immediate OBD code, a technician would listen to the specific pitch and location of the noise, often using a stethoscope. They would also check for excessive play in the axles or wheels and inspect for fluid leaks (if applicable to the reduction gear).

When to See a Shop:

  1. Prompt Action: Since the noise is getting progressively worse, it's critical to schedule a service appointment immediately. Continuing to drive with a failing bearing or gear can lead to catastrophic failure of the drive unit, which is a much more expensive repair and could leave you stranded.
  2. Avoid Heavy Loads: Try to avoid aggressive acceleration or heavy loads until the vehicle can be inspected. This will minimize stress on the potentially failing component.
  3. Rivian Service: Contact Rivian Service to arrange for diagnosis. They have the specialized tools and training to accurately identify and repair drive unit issues specific to your R1T.
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