Toyota AWD Differential Bearing Noise

[@jaybizzyoo]

This happens all the time when these Awd vehicles get towed in and not brought in on a flat bed. if you get your awd drive sienne towed with just 2 wheels up in the air and the other rolling on the ground expect that growling sound it could happen to new vehicles too great video👍📹😮

[@koreymayo8884]

You should've shown and an example of the noise or at least explained what it sounds like

[@reecediaz1700]

I know right.

[@bradcdavis00]

Thanks for posting and very timely for me. I have just noticed a growling coming from the rear of my 2015 AWD Sienna. Is there a TSB for the Sienna Viscous Coupler?

[@drgstarflash]

Is this the same on the Lexus NX200t? I just had the differential and coupler replaced. How can a TSB become a recall for this issue?

[@markmangano1731]

Outstanding video Mike thank you so much Mark mangano dependable auto

[@eldonhuckins4040]

I have a 2018 Toyota Rav4 Adventure AWD that has started making a noise from the rear of the vehicle. Could this be what is causing the problem. I have already replaced the right side wheel bearing because it initially sounded like it was coming from there. Still have the noise.

[@highlonesome7482]

Fantastic, knowledgeable video. Quick question..I have a 2019 Toyota 4runner Limited AWD with the torson center locking differential. The vehicle only has fifteen thousand miles on it. While driving slowly in packed snow the other day, I turned the selector knob to 4 HI, which locks the center diff. Immediately I heard a VERY CONCERNING and HEAVY and LOUD grinding noise with vibration (not the light buzz that owners say is normal). It sounded like gears slippng past one another. I Immediately stopped the vehicle as the 4WD indicator light flashed signaling a failure to engage. I tried several times to engage 4WD with the vehicle stopped and in neutral without success. I then put the vehicle in the default AWD mode and returned home without incident. Several days later, I tried engaging the center locking diff again and it worked perfectly. I also took the vehicle to the dealership and everything checked out fine...🤔 I've got one year of warranty left but am still very concerned. I love the vehicle but am worried about the episode. Your opinion would be greatly appreciated. What do you think? I can't find anything on the web. Thanks in advance!

[@noahbahdee933]

I need the electromagnetic part only for a 2011 Venza. What is the part number for that? Thank you for any information

[@rotaxrider]

Also when was this bulletin issued? There was one that was released in 2013 with the same number but no R1 on the end? Do you have a link with the information for this SB?

[@jonathanfreedom1st]

My Problem started after the wife started regularly running through a Nice big Auto Car wash, i think it was Undercarriage high pressure wash that pushed water into Said Bearing killing what was left of its life. I replaced just the Bearing itself. Alittle tricky disconnecting the tiny pins in plug and remembering to put back together, I also used a Diff type ((Permatex)) vibration proof Sealant for reassembly, filled with proper Diff oil, BE SURE TO USE ANTI SEIZE LUBE FOR BOLTS, And be careful removing old ones,they can be stubborn due to "steel in aluminum corrosion,"Problem solved. Noise gone. Only had to purchase OEM Toyota dust cover ring and Bearing, consider Oil Seal behind coupler if it is leaking, mine was not, I didn't replace. Cheers. Hope it helps someone.

[@Livefree2020-j6h]

My AWD Matrix had a whirring noise coming from the rear differential. Ignored it, differential ceased while driving at 80 km, snapped the passenger side rear axle in half.

[@joshuasansalone5993]

My 2013 Sienna has been unusually loud for the past little bit and the noise seems to be coming from the rear differential area. Would it be possible to replace the bearings without purchasing a whole new unit? It seems like the aftermarket replacement bearings don’t have the o-ring attached, since the design of the coupler has been revised and is now sealed. Would the dust deflectors and covers from the revised coupler fit in the original? Thank you immensely.

[@edritchie270]

Coupler to differential . conical washer and flat washer, witch way do they go? Does it matter

[@johngraham4965]

great information,will check mine to see if my bearing race failed or??

[@vivvaraschin8738]

My '10 venza developed a noise ,It was not from the outer large bearing (fairly good condition) but from the inner smaller bearing behind the magnetic coil,I do not think there were any TSB for the venza models

[@MustansirBandukwala]

What did you do to fix the problem

[@edritchie270]

I took apart our 2009 AWD VENZA . Big bearing is good. Going to replace it anyway because it comes with the bearing kit I purchased. But the inside smaller bearing is bad. Is this normal or something else maybe causing this issue?

[@jonwittenstein344]

What does the bearing failure sound like??

[@GSRider]

Same problem on the Venza ?

[@vivvaraschin8738]

Thanks for the video

[@mannylokuras]

Hello, I have a question, I hope you can help me. I just bought a 2010 rav4 AWD and its making a humming noise around 30mph till 40mph if I let off the throttle noise stops. I think its coming from the transmission area. I read that it's normal on toyotas. Any suggestions?

[@karlschauff7989]

There are many noises that Toyotas make that are supposedly "normal" but still indicate underlying issues.

[@TransmissionDigest]

Noise can be extremely difficult to diagnose. A noise affected by throttle position normally denotes a gear issue and not a bearing problem. Try to determine the source with the vehicle on a lift.

[@swikarpyakurel8863]

I have the same issue on my rav4 2011.

[@Ahmed-ev3pc]

@@karlschauff7989 have you figured it out

[@lezzi411]

Same issue for me on a 2008 rav4, have you found any solution ?

[@hurstmuscle]

What are the part numbers for the Sienna? The TSB is only for the RAV4

[@daijoubu4529]

Can the 4 studs that connects to the drive shaft be removed/replaced without taking the coupling apart?

[@staceycondell-deminico1301]

Did they do anything for the Sienna's?

[@amandapearson3740]

I have a 2015 sienna awd. Its making shuddering almost feels like tires aren't gripping but only in reverse and at a slight incline so while under pressure. The rear diff oil was black as night and had a shimmer to it. Toyota is saying trans my mechanic says viscous coupler or rear differential. Someone helpppp

[@bestenginejdm1543]

Do you buy that parts for rebuilding back

[@jonathanfreedom1st]

Would these fail causing a very faint whizzing kind of sound hard to identify where it's coming from and not affected by actual acceleration but just rolling at about 30 mph and up? Faster the more pronounced and higher pitch. ? Anyone.

[@nwo6541]

Yes

[@marcussimbulan6027]

Can you buy the whole assembly with the cover?

[@g.j.p3291]

Hi Does this include the 2010 matrix?

[@rojasbjm]

Does this apply for 2017 RAV4 XLE AWD AT Transmission? Why the NSK bearing replacement has no seal on it? Can I get that piece with the o-ring included?

[@autoprojobs4941]

From Mike Riley: The video in question refers to Toyotas 2006-2012 due to the differential bearing failure. Newer models will have this upgrade done at the factory. Replacement parts availability is dependent upon what Toyota thinks is applicable. It may be that by 2017 Toyota has chosen to not offer the components separately but rather with the viscous coupling assembly only. Contact Toyota to determine what is available along with any adjacent parts that are needed

[@rojasbjm]

​@@autoprojobs4941 Sure! According to ToyotaDIYers, this part is unserviceable (1) (please see links at the end of the comment): As the company claims with `N03` code "This part is not supplied as an individual part because it's difficult to keep the function/quality of parts assembled/disassembled". Curious that is not the only part that is treated the same for Toyota (There are other parts that you can't buy at the dealer). Talking with my mechanic friend he told me that achieved to find the damaged bearing (an NTN 6819 LLU 95x120x13mm (2), also manufactured by NSK). I haven't talked with him since then, not sure if the new bearing has a seal or not. Not sure if the O-ring seal is needed since it seems like water can't enter since the enclosure is kind of "sealed". I'm afraid that Toyota will need to publish a TSB in the next couple of years for this kind of component since I'm seeing all over the internet that I'm not the only owner with this issue in the car (i.e. they extended the warranty for some RAV4 series 3 XA30 (3)). I'm putting all the info here in case someone is in the same situation as me. Links: 1 - www.toyodiy.com/parts/p_U_201704_TOYOTA_RAV4_ASA44L-ANTMKA_4101.html 2- www.ebay.com/itm/NTN-6819-LLU-Deep-Groove-Ball-Bearings-95x120x13mm-/323942380235 3- static.nhtsa.gov/odi/tsbs/2016/SB-10092682-5448.pdf

[@TransmissionDigest]

This bearing issue impacts several models of Toyota's. Although the cover and viscous assembly may be different, the bearing in question is the same. The factory bearing is proprietary to Toyota and not available separately although a comparable bearing (size wise) is available in the aftermarket but without the O ring groove. Water intrusion between the bearing and cover is not the issue but rather water intrusion into the bearing itself which is why Toyota implemented the large metal clad seal and redesigned deflector. It is those two parts that prevents bearing failure due to moisture. If a bearing through the aftermarket is preferable then use that and purchase the metal clad seal (41302-42050) and one of two deflectors based upon design (41252-42013 / 20). An OE bearing can be obtained by purchasing a new cover w/ bearing (90304-94005) and rob the bearing.

[@rojasbjm]

@@TransmissionDigest Thank you for all the information. I'll share it with other owners since this is affecting so many models.

[@cansmash]

Just a heads up, I don’t think the revised deflectors will work unless you buy the updated coupler housing (cover). Based on the pictures in the TSB, the revised cover OD has a shoulder that the revised deflectors fit over top of. I can’t see the new deflectors working with the original covers, if you are trying to do the bearing replacement only. Someone correct me if I’m wrong. I’m planning on doing the bearing replacement on a 2013 Sienna. I think I’ll have to use the originally designed deflector, without the “metal clad seal”. Does anyone know if the RAV4 covers fit the Sienna couplers?

[@mjf3570]

Seems easy enough so why is it so expensive to fix?

[@unnmaed]

Well that's just great

[@keithjaime7254]

Is it the same for the 1994 add caldina ST 195?

[@TransmissionDigest]

Not sure of the differential design in a 94 Caldina as the model Is not used here. Check with a local dealer and review an exploded view of the differential and also check for any TSB's.

[@firmbeliever3847]

Is it just a noise? Or is it a issue that will cause damage down the road?

[@autoprojobs4941]

The complaint typically is noise-related but, as Mike indicates elements, particularly moisture, will eventually cause bearing failure.

[@karlschauff7989]

It's an issue.

[@rotaxrider]

So is the Viscous Coupler a dry unit? It doesn’t share or use the oil from the rear differential does it?

[@TransmissionDigest]

The viscous coupler does contain oil (fluid) which is unique and separate from the differential oil. The viscous coupler is not serviceable but can be tested, as mentioned, to ensure that the oil has not leaked out into the differential. If the inner spline moves freely it's an indication that the oil has leaked out and that the viscous needs replaced. ~ Mike Riley

[@gregrobbins9493]

Good info, or just take the drive shaft out and use it as a normal van

[@JRInnes]

An annoying growling noise at 40-45 mph was driving me crazy. Apparently some part of the 2010 RAV4 powertrain is flawed by design, so replacing the part might not fix anything! I found this free and easy workaround and it eliminated the noise! kzbin.info/www/bejne/enOngYpsir6Gp9U