Front Differential needle roller bearing replacement

I have an 07 4Runner part time 4wd. V6.

Just replaced all suspension with toytec, did UCA, and while I was at it did both cv shafts even though only one of them was puking bad enough to need fixing. So with the shafts I did new seals.

I noticed last night doing a test drive that it's perfectly fine in 4wd. But as soon I go to 2wd, I can barely hear and feel that womp womp grinding/bearing noise up front. I'm guessing it's the bearing you all are discussing.

Do I try and take this TSB to Toyota and see what they say? Or buy the ecgs bushing kit and see if that solves the problem. This is my DD so it's starting to get frustrating. And my wallet is shrinking fast. I fix one thing and two more things present themselves.


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Did you end up trying to get Toyota to replace the bearing for you?
 
Have a groaning/growly feeling right below my feet. Seems like my issue is needle bearing. But everybody says it goes away in 4WD. So I'm curious how you diagnose with the AWD. Anybody diagnosed, and replaced this on the AWD V8?

This ended up being a bad brand new CV axle from NAPA. It was binding on any sort of a load. I have a video ill throw on youtube and post here. Swapped to another new CV axle and it works fine. Crisis averted.

How do you diagnose the bad CV? Mine click like that video when I rotate by hand, on stands unloaded. But I thought it was due to the excessive droop(UCA+King's).

I did recently replaced both axles and fluid due to split boots, used rockauto axles :suspicious: Curious what all I should planning to replace. Again.
 
Have a groaning/growly feeling right below my feet. Seems like my issue is needle bearing. But everybody says it goes away in 4WD. So I'm curious how you diagnose with the AWD. Anybody diagnosed, and replaced this on the AWD V8?



How do you diagnose the bad CV? Mine click like that video when I rotate by hand, on stands unloaded. But I thought it was due to the excessive droop(UCA+King's).

I did recently replaced both axles and fluid due to split boots, used rockauto axles :suspicious: Curious what all I should planning to replace. Again.
i had mine at full droop on a lift and put it in gear, it was bouncing the whole diff and side of the poor CV. Swapped sides with it and it did the same, replaced CV and no issue since.
 
Interesting... I just noticed this TSB popped up on TIS recently. Seems like there's a common issue here with these front units at least on the Part-Time 4WD set-up.

View attachment 180741

I see though that you're running a V8 unit though...

Well here's the "write-up" straight from the FSM (Isn't that after all the holiest of write-ups? It even has pictures! Take that ancient story book revered and reviled by all!)

Sorry to liven an old thread but if the dealer is not willing to follow the TSB because they claim they can’t prove that’s the issue, how much is the estimated cost to pay for the parts and labor myself?
 
Sorry to liven an old thread but if the dealer is not willing to follow the TSB because they claim they can’t prove that’s the issue, how much is the estimated cost to pay for the parts and labor myself?

Is this for your 07' or 16'?
 
Who can answer this...

Why the ecgs or low range bushing not fit the AWD model 4runner if the clamshells or diffs are same? What’s the problem?
I may be having issues and need this replaced.
 
Needle bearing exploded

I got all the pieces i could but there are what i believe is 3 "bearings" lodged in the corners of the diff and i can't seem to get them out if i replace there bearing should i be alright or is it very important that i get them out

N9ADHA3l.jpg

mun0kdOl.jpg

TJYOOrul.jpg
 
I had a groaning/growling feeling below my feet, as well. Thought it might be that bearing. After replacing the driver axle due to a torn boot, I was tempted to swap this bearing, but didn't. The noise remained after the axle swap, and my wife mentioned feeling the same thing on the passenger side, and I still felt the same on the driver side. It only makes noise at slower speeds (0-14mph), and goes away when it warms up for the year. After 4 years, I finally discovered that it was the passenger UCA bushing that needed to be loosened, greased, and retorqued at resting level. If I pushed down on the front passenger side of the bumper, it was squeaky, and this was the culprit 100%. If yours does this at higher speeds, it's probably not the same thing. Something easy to check, though. Good luck.

Have a groaning/growly feeling right below my feet. Seems like my issue is needle bearing. But everybody says it goes away in 4WD. So I'm curious how you diagnose with the AWD. Anybody diagnosed, and replaced this on the AWD V8?



How do you diagnose the bad CV? Mine click like that video when I rotate by hand, on stands unloaded. But I thought it was due to the excessive droop(UCA+King's).

I did recently replaced both axles and fluid due to split boots, used rockauto axles :suspicious: Curious what all I should planning to replace. Again.
 
I got all the pieces i could but there are what i believe is 3 "bearings" lodged in the corners of the diff and i can't seem to get them out if i replace there bearing should i be alright or is it very important that i get them out

N9ADHA3l.jpg

mun0kdOl.jpg

TJYOOrul.jpg

I not sure what the answer truly is, it could be Ok to leave them or not, BUT I've always been anal when replacing any parts and I just couldn't leave those needle bearings or any pieces of any part in there, if they get dislodged into the moving conponents of the differential it could do major damage and really ruin your day.

That being said a couple of dental picks could possibly help in getting them dislodged.
 
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Front Passenger Side Grinding

Hello,
I have a 2005 T4R Limited 4x4. A couple of months ago I installed the Daystar 2.5 inch spacer lift kit, but afterwards I noticed a grinding/wafting noise at the front passenger side of my truck, while driving from about 15mph-45mph. I was taking it in the next day for a realignment anyway, so, I thought that would fix the issue. After the realignment I still had the noise and a slight vibration. I soon discovered that the sound completely disappears in 4WD. After some research, I thought it may be the CV Axle; The inner boot was torn anyway, so I replaced the CV axle. During the install, I tried turning the wheels manually while the truck was jacked up: The driver side spins fine; however, the passenger side would spin, then hit a point where it would bind and take a little more force to complete the rotation (The suspension would lift slightly while I pushed the wheel around the bind spot). After I installed the new CV it still binds, and the noise is still there while driving. Sometimes the noise isn't noticable at all and other times I notice it immediately when I get up to speed; the noise still disappears when I cycle to 4wd. I see everyone talking about the needle bearing on the drivers side, but it's definitely the passenger side. Could it be the ball bearings on the passenger side of the differential? I assume it's not the wheel bearing since the sound/vibration disappears in 4wd. I'm open to all recommendations! Thanks!
 
maybe you can use a small magnet to take those pieces out. it might help.

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I got all the pieces i could but there are what i believe is 3 "bearings" lodged in the corners of the diff and i can't seem to get them out if i replace there bearing should i be alright or is it very important that i get them out

N9ADHA3l.jpg

mun0kdOl.jpg

TJYOOrul.jpg

Ill answer this. You really, REALLY need to get them out of there. The drain plug is magnetic and serves to hold onto a lot of the metal chunks that could fall off in the diff. A roller bearing could stick to the magnet, but if it were to come off by vibration (train tracks or bumps) and somehow end up in the inner pinion bearing race and cause the bearing to fail, the entire diff will fail. You could have the gears either breaking apart due to altered pinion depth or the differential literally burning all the parts inside and wallowing out all the seals and carrier bearings causing the entire housing to become junk.
 
Hello,
I have a 2005 T4R Limited 4x4. A couple of months ago I installed the Daystar 2.5 inch spacer lift kit, but afterwards I noticed a grinding/wafting noise at the front passenger side of my truck, while driving from about 15mph-45mph. I was taking it in the next day for a realignment anyway, so, I thought that would fix the issue. After the realignment I still had the noise and a slight vibration. I soon discovered that the sound completely disappears in 4WD. After some research, I thought it may be the CV Axle; The inner boot was torn anyway, so I replaced the CV axle. During the install, I tried turning the wheels manually while the truck was jacked up: The driver side spins fine; however, the passenger side would spin, then hit a point where it would bind and take a little more force to complete the rotation (The suspension would lift slightly while I pushed the wheel around the bind spot). After I installed the new CV it still binds, and the noise is still there while driving. Sometimes the noise isn't noticable at all and other times I notice it immediately when I get up to speed; the noise still disappears when I cycle to 4wd. I see everyone talking about the needle bearing on the drivers side, but it's definitely the passenger side. Could it be the ball bearings on the passenger side of the differential? I assume it's not the wheel bearing since the sound/vibration disappears in 4wd. I'm open to all recommendations! Thanks!

This is the issue I’m having. But it may still be the needle bearing and the sound transferring over to the middle of the diff and then sounds like it’s the passenger side.

I haven’t cycled it into 4wd yet.
 

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