Cyclical squealing / squeaking sound from front differential. Fix = debris removed & seals replaced

[AZGOLD]

Cyclical squealing /squeaking from front differential area between 39-50 mph.

Immediately goes away when switched into 4HI, and comes back when 4HI disengages.

Thank god I havent done a lift, tires, wheels or anything yet or Toyota would certainly blame that as the culpret. Been there done that

I`ll get the truck in to service as soon as I can

UPDATED WITH DIAGNOSIS & FIX

Ok, Heres the update:

Service dept were able to re-create the issue. ( chirping/squealing between 35mph & 45mph ) goes away when H4 is engaged.

Technician found " foreign material" between axle seal and replaced 2 seals 90311-47039 & 90311-47040 Type T oil

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[Mad Ghost]

Sorry to hear that, please update the thread when you find out more.

 

[LLL1990]

This is the risk of buying a vehicle in the first model year, keep us updated.

 

[AZGOLD]

Ok, Heres the update:

Service dept were able to re-create the issue. ( chirping/squealing between 35mph & 45mph ) goes away when H4 is engaged.

Technician found " foreign material" between axle seal and replaced 2 seals 90311-47039 & 90311-47040 Type T oil

 

[brumey]

So, If I understand your description correctly, it's only happening in in 4WD Low? Not happening in 2H or 4H?

I need to go test my 4WD ASAP.

 

[JR1]

Interesting. Foreign material could be anything other than gear oil and gasket material.

 

[brumey]

I think I'd be asking for a little more detail on the service report.

 

[Dead Horse]

So, If I understand your description correctly, it's only happening in in 4WD Low? Not happening in 2H or 4H?

I need to go test my 4WD ASAP.

Pretty sure he means he's in 2WD when it's making the noise. 4Low probably won't be hitting 50 mph unless you've driven off a cliff lol

 

[brumey]

Got ya. I still need to test my 4wd modes and run them every few months.

 

[AZGOLD]

Sorry for any confusion. The noise only occurs in 2H ( normal driving ) The noise immediately went away when switched into 4H on the fly. Yes you can switch into 4H at 43 mph . If you are going to fast to do that, the truck will let you know.
I dont need any more detail regarding the diagnosis myself. I just wanted it documented in case there were any further issues. They told me Toyota Corporate was notified of the situation.

 

[AZGOLD]

Foreign material could be anything other than gear oil and gasket material.

Well it came from Japan, so if there was "material", it would be foreign

 

[human_jed]

I’m having what sounds like a similar issue on a 25 ORP iforce I’ve just taken delivery of. Mine is more of a subdued howl from the front left, goes away when put into 4HI. Did the dealers debris removal and seal change actually fix the issue for you?

 

[AZGOLD]

Did the dealers debris removal and seal change actually fix the issue for you?

Yes . No more issues and I have about 3K more miles on it now.

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