Rear Driveline Disconnect/Reconnect Noise? - Page 3 - Toyota RAV4 Forums
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post #21 of 141 (permalink) Old 02-26-2019, 11:08 PM
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Originally Posted by Philosurfer View Post
I’ve listened closely the last few days and it has been silent. I tried multiple modes. Nothing. I think OP has a serious problem.


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Turned off the radio and listened closely as well and there is no noise at all. Hope it stays that way!!


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Good work guys on this topic. This is exactly what forums are for.

Does anybody know if the Hybrid also have the ratchet-type dog clutch system?

Or something completely different.



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The hybrid has no driveline between the axles to disconnect, just rear wheel motors. Nothing to worry about with the hybrid.
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post #22 of 141 (permalink) Old 02-27-2019, 12:07 AM
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Originally Posted by XA50_Trail View Post
Turned off the radio and listened closely as well and there is no noise at all. Hope it stays that way!!




The hybrid has no driveline between the axles to disconnect, just rear wheel motors. Nothing to worry about with the hybrid.
You think they leave the electric motors engaged and spinning 100% of the time? Wouldnt that give a lot of wear to the bearings and brushes in the motor?

I thought I read about disconnecting the rear electric motor but perhaps they just mean disconnecting it electrically .

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post #23 of 141 (permalink) Old 02-27-2019, 11:47 AM
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Quote:
Originally Posted by Riley5781 View Post
You think they leave the electric motors engaged and spinning 100% of the time? Wouldnt that give a lot of wear to the bearings and brushes in the motor?

I thought I read about disconnecting the rear electric motor but perhaps they just mean disconnecting it electrically .
Do some research, you're way out in left field, HV motors are brushless AC, the HV has a totally different drive system and shouldn't even be discussed in this forum, the '19 HV has it's own forum.

https://www.rav4world.com/forums/201...av4-hybrid-ev/

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post #24 of 141 (permalink) Old 02-27-2019, 01:17 PM Thread Starter
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Well, It's at a Toyota Dealership. I actually had to take it to two because at the first one a tech rode with me who had NO idea how the system worked or that the technology even existed, but claimed it sounded "normal" and then accused me of wasting the dealer's time after I assured them grinding noises are not normal. His excuse was "It's a brand new car, it can't have problems" Needless to say I almost lost my mind when they were giving me the broom. (How does one know that something sounds normal if they don't know how it works??? Questions for another place...)

At the second dealer a Service Advisor rode along, heard the noise, and was much more open minded to the possibility of a faulty component or something.

The thing I worry about is it I've discovered it only happens once differential oils are up to temp (driving 20-30 min). If their techs take a test drive for just 5-10 min they may not hear it. Crossing my fingers.

Hell, I've even though of mounting a digital recorder under the car to various parts and differentials until i hear it to narrow it down. Hopefully the Toyota Dealership can figure it out before resorting to that.
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post #25 of 141 (permalink) Old 02-27-2019, 01:52 PM
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I woulda had a serious talk with the service manager at the first dealership, that tech needs a good tune up!

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post #26 of 141 (permalink) Old 02-28-2019, 06:31 PM
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i just bought the same car, 19 adventure and (no). I do not hear the noise. I wonder if a tech at a different dealer might be more up on the new technology?? good luck on this.
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post #27 of 141 (permalink) Old 02-28-2019, 07:02 PM
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I have a 2019 Adventure & it seems that the rear driveline will still disconnect in Sport mode. I have not been able to find any mode where the rear driveline is "locked". I base this on the center screen graphic that you can pull up by pressing the down arrow on the appropriate multi-information display window. In all modes (including sport), I can get the rear-driveline & wheels to go dark by moderating throttle input. I tried this today on my way to work & was going 20-30 mph. I interpret this to mean that the driveline disconnect is computer controlled in all modes.
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post #28 of 141 (permalink) Old 02-28-2019, 07:13 PM
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Originally Posted by hereinhelena View Post
I have a 2019 Adventure & it seems that the rear driveline will still disconnect in Sport mode. I have not been able to find any mode where the rear driveline is "locked". I base this on the center screen graphic that you can pull up by pressing the down arrow on the appropriate multi-information display window. In all modes (including sport), I can get the rear-driveline & wheels to go dark by moderating throttle input. I tried this today on my way to work & was going 20-30 mph. I interpret this to mean that the driveline disconnect is computer controlled in all modes.

Rob


This is my experience as well, hence my comment/question above.


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post #29 of 141 (permalink) Old 03-01-2019, 01:09 PM Thread Starter
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Hmm, Mine was always illuminated in sport mode no matter what power or cruising was happening. Perhaps I have a couple issues with my system (something sticking, something not filled with oil, etc) Toyota still has my RAV4 and are scratching their heads about it. No updates yet.
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post #30 of 141 (permalink) Old 03-01-2019, 03:08 PM
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Hmm, Mine was always illuminated in sport mode no matter what power or cruising was happening. Perhaps I have a couple issues with my system (something sticking, something not filled with oil, etc) Toyota still has my RAV4 and are scratching their heads about it. No updates yet.
This has been my experience as well. I’ll try to drive with a lighter throttle in sport and see if I can see the rear disconnect.
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