OFFICIAL 2nd gen 4x4 front differential bearing vibration thread

That statement alone says that the vibe you're experiencing is not the vibe in this thread.

 

How do you explain the post below on page 44 of this thread then?

I'll add that it only happens when accelerating not decelerating through the 2k line. Anyone have any ideas on most likely causes?




Quote:
Originally Posted by racemybuick
Just shake the cv shaft... If it shakes at the diff, guess what, it's the diff.

My truck is a bone stock sr5 with 110k miles. I bought the Toyota gold extended warranty thinking I was covered to 125k. Turns out the mileage was limited... A year ago, they told me nothing was wrong with my truck. I bring it back 2 weeks ago, they say I need a new diff... Exact same sound from a year ago, only this time, I'm out of my warranty!!!

It's the bearing. My truck makes the noise no matter what gear or 4wheel pattern I'm in. I can shake the cv shaft up and down almost 1/4 inch at the diff. Wheel bearings check out fine, cv shafts are in good shape.

Going to swap out for bushing soon...

John

You're the first person (I think) in the last few years that had the problem even in 4hi. Good to know.

 

Then the vibe you're experiencing is the vibe described in this thread.

Bump for my question below . . .

 

Well I don't know, and it doesn't sound like you do either. I did provide what I feel are more detailed symptoms then most have provided. So I'm hoping the combination of all these things I detailed in my last two posts might help someone narrow it down to only one or two possibilities. Anyone have any ideas?

The increased vibration when the truck is cold compared to when it warms up (driven for a half hour or so) really throws for me a for a loop.

 

You're right - I don't. But, for $100+/- (depending on if you get the bearing removal tool and a new oil seal as well) you might want to go ahead and knock it out just to eliminate this from the list of suspects. Plus, if you do decide to lift your truck, it's already taken care of. However, since your truck is under warranty you could push it all on the dealer and have them do all of the trouble-shooting to rule out other possibilities.

For the increased vibe when cold issue, maybe it's due to no oil on the bearing after the truck has been parked for a period of time. Once you drive it a bit, the oil in the front differential flows to the bearing thereby lubing it and reducing the vibe? Just a guess. Either way, it sucks that you're experiencing this on a new, non-lifted truck. This isn't right, especially for a Toyota.

 

I have a weird vibe/grind feel ans sound from my front end. But putting it ;hi doesnt get rid of the sound and feel. So im not sure if it is the diff bearing... I will most likely change it out for the ECGS bushing anyways, just to be safe..
I had the bad bearing in my 07 that the dealer replaced. But for my new truck im not sure if its the bearing or just the tires im hearing/ feeling..

 

The FSM says the snap ring is a non-reusable part. Some come out rather beat up. Getting them back in that way makes it more difficult. It is pretty common engineering practice to not reuse such things as clips, cotter pins, etc. Also, the FSM says to orient the snap ring on the half shaft with its opening pointed downward, and coat the splines of the shaft with ATF.

 

Rock on - thank you very much!!! I'm doing this job tomorrow morning. I called the local dealer this evening to inquire about the clip . . . of course they don't have it. Once I remove it tomorrow I may get a friend to drive me to the local hardware store and try to find a match.

 

What! The stealer does not have a half shaft snap ring?

Try this. Plan A: Help the stealer out a bit. Call them back and ask them if they have this part number: 43425-04040, Ring, Drive Shaft Snap. Plan B: Call an independent repair shop and ask them if they have one. Plan C: Be patient, wait until next week and order one or two. Plan D: Reuse the old one. I don't reuse them but frankly, I'm going to bet that, despite the fact that the FSM says it is not reusable, most people are reusing them, including the dealer.

I would suggest you not waste any time looking at a general hardware store looking for a substitute. You are not going to find one and you will have a really, really bad day if you try to use something that breaks off inside the differential (Murphy's Law you know).

Good luck.

 

Here is my issue. I had the issue everyone has with vibe up front. Changed out needle bearing with the new bushing and changed CV axle at the same time no more issue. Then I Could not stop front seal from leaking. went through 5 seals some I replaced and some the dealer did. No visible difference or rips in any on the seals. Now the last one was done by the dealer and they replaced the cv with factory (the last was aftermarket due to price). and now it is leaking again. The only two things I can think of is either the front diff relief is clogged or I have a diff drop up front maybe it is making my front diff not centered, maybe alittle to the passenger side.

Maybe anyone have some suggestions.

 

You can get it here http://www.toyotapartsales.com/part...make=Toyota&action=oePartSearch&siteid=214074

That blows big time. Since the dealer did it last time take it back. Is it possible oil is getting around the outside of the seals or maybe the bushing is not pressed in flush?

 

Another person was reporting the same problem awhile back. I don't remember if the solution was ever posted. I agree with the previous comment, take it back to the dealer.

Also, check the easy stuff first. The two lines that clip to the inside of your left fender well are both vent lines: the smaller vents the ADD actuator, and the larger the diff. The large line starts out on the right side of the diff. just above where the ADD tube bolts to the diff. It is a bit hard to see. Look for possible kinks or a place where line might be pinched. Make sure the cap on the top of the line is free to vent. Touch not the line coming off the ADD actuator itself, at the actuator, as it likes to break off just looking at it.

 

WTF Adam, you still dealing with that damn seal. Dealer replaced CV and seal with factory parts. Diff drop has nothing to do with it. I would rule out the bushing not being driven in far enough, that SOB is in there. The one thing that does make sense is a clogged breather. Pressure builds inside of that diff with no where to go, it's gotta relieve itself somewhere, and it picked that seal.

 

Thanks for the thoughts. I checked the breather lines and saw no visible kinks. But how do you tell the breather cap deal on top is not clogged, or how do you remove the cap?

 

Just for you I went out and removed mine. It consists of a 14mm long crimped metal cap affair on top with a 5mm long plastic collar beneath the cap and a 20mm long black plastic tube piece below that which inserts into the hose. Inside it is a micro screen. It just twists/pulls off the end of the hose.

If you blow into it there should be air coming out the metal cap, not a whole bunch, but a little at least. Don't try to blow air backwards down the hose into the differential without first removing the 10mm fill plug on the left side of the differential or you may end up with two more leaks...

Good luck.

 

Any update on the 1st gen bearing?

/

 

does anyone have the tool for sale or rent?
will pay shipping.

I notice my vibration at complete stops at idle.

Also is the axle CV seal the one closest to the Differential, where it slides in? if that makes sense. I think i have a leak right there, and hoping that will fix it.

 

IF you have a vibration at complete stop, at idle, it's not your CV that is the problem.

Yes there is an axle seal at the diff where the axle inserts.

 

I'm still thinking I should add the bushing, I just don't want to dish out the extra $60 when I know someone on owns it and not in use, and can share it. Please PM or reply if you can share your tool for a weekend.

 

Does anyone know who can put this bearing from east cost gear supply ,in for me, that is in Oregon. Sounds like there are several doing it themselves but not me. I don't have the place to do it.