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Old 09-21-2018, 12:58 PM #511
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So I finally looked in my ABS port and saw this on the left side. This is after the truck not moving for 3 weeks. The right side is dry(er).



I don't have the parts yet and won't be able to get them in time before I go over to my mom's house where the press is, unless I get ripped off by the local stealership. So my question is:

1) how long can I let this go until it blows out into the brakes or the bearing fries? I am just using it for kicking around town for now while back in town, plus I go to my mom's house which is 100 km away. I was thinking of doing a trip of maybe 500 miles next week. If it blows I can still limp home right? Just bring some extra diff oil.

2) maybe I can just replace the seal for now and get a bit more life out of it until I do the whole job?
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Old 09-21-2018, 01:26 PM #512
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I should have said the brakes are dry. The local dealer has the seals, dust seal and o-rings in stock and they're cheap enough I'll just buy them. Then swap em out this week. This'll give me some more time?

I rotated the wheel and it wasn't lapping it up. About half the teeth have oil on them. So it's not too far gone yet, not soaking wet in there. I'll replace the seals and then assess the state of the grease in the bearings when I'm in there. Breather wasn't plugged.

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Old 09-21-2018, 01:28 PM #513
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Quote:
Originally Posted by Mark_BC View Post
So I finally looked in my ABS port and saw this on the left side. This is after the truck not moving for 3 weeks. The right side is dry(er).



I don't have the parts yet and won't be able to get them in time before I go over to my mom's house where the press is, unless I get ripped off by the local stealership. So my question is:

1) how long can I let this go until it blows out into the brakes or the bearing fries? I am just using it for kicking around town for now while back in town, plus I go to my mom's house which is 100 km away. I was thinking of doing a trip of maybe 500 miles next week. If it blows I can still limp home right? Just bring some extra diff oil.

2) maybe I can just replace the seal for now and get a bit more life out of it until I do the whole job?
Mine started leaking right before a trip. I didnt want to cancel so I bought a gallon of gear oil from Walmart. Only around $14. 200 miles each way, I lost around 18oz on the way there. Topped it off & wheeled for two days. Didn't loose much wheeling so I just drove it the 200 miles home. Seems to leak more on the highway at higher rpms. I need to buy a press, she's been sitting since July.

Mine has the new seals but but they dont ride on the retainer correctly. Which is why everyone is doing the flip. I just rebuilt the drums too. Now I need to do bearings & new shoes. argh!
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Old 09-21-2018, 01:49 PM #514
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Quote:
Originally Posted by Mark_BC View Post
So I finally looked in my ABS port and saw this on the left side. This is after the truck not moving for 3 weeks. The right side is dry(er).



I don't have the parts yet and won't be able to get them in time before I go over to my mom's house where the press is, unless I get ripped off by the local stealership. So my question is:

1) how long can I let this go until it blows out into the brakes or the bearing fries? I am just using it for kicking around town for now while back in town, plus I go to my mom's house which is 100 km away. I was thinking of doing a trip of maybe 500 miles next week. If it blows I can still limp home right? Just bring some extra diff oil.

2) maybe I can just replace the seal for now and get a bit more life out of it until I do the whole job?
You won't know unless you pull the drum off, mine was stinking with tranny oil..had been leaking for 20-30k miles probably and still the rear axle had sufficient lube. Replacing the seal seemed to fix it and I was already doing a break job anyway....in fact that's how I discovered the issue :-)

More mechanically minded people will chime in but I doubt it's critical unless your rear axle is extremely low on fluid.

Yeah, my bearings will be next I'm sure...and then I'll look at flipping the retaining ring because it literally just about seals as stock with the Toyota oil seal.

Last edited by JKD; 09-21-2018 at 01:52 PM.
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Old 09-21-2018, 01:50 PM #515
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Mine has the new seals but but they dont ride on the retainer correctly. Which is why everyone is doing the flip. I just rebuilt the drums too. Now I need to do bearings & new shoes. argh!
Oh so what you're saying is I could actually be creating problems by replacing the seals because of the redesign, if I don't flip the retainer? Because they won't line up with the polished part where they are supposed to go.
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Old 09-21-2018, 01:52 PM #516
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You won't know unless you pull the drum off, mine was stinking with tranny oil..
I pulled one of the drums off recently and it was fine. That's comforting to know how far you were able to go on it.
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Old 09-21-2018, 01:56 PM #517
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I pulled one of the drums off recently and it was fine. That's comforting to know how far you were able to go on it.
The rear seal was my first ever repair on a car...no lie.

A couple hour brake job did turn out to be a lot more involved than I'd planned but thanks to this forum I've been able to do a lot of stuff, saved $1000s in labor and had 'fun' :-D
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Old 09-21-2018, 01:59 PM #518
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Oh so what you're saying is I could actually be creating problems by replacing the seals because of the redesign, if I don't flip the retainer? Because they won't line up with the polished part where they are supposed to go.
correct, when I did the axle swap I replaced the seal because it was right there. I should have just left the old seal in because it wasn't leaking. I was thinking preventative maintenance when I used to go by "if it aint broke, dont fix it."
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Old 09-21-2018, 04:42 PM #519
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Quote:
Originally Posted by Mark_BC View Post
So I finally looked in my ABS port and saw this on the left side. This is after the truck not moving for 3 weeks. The right side is dry(er).



I don't have the parts yet and won't be able to get them in time before I go over to my mom's house where the press is, unless I get ripped off by the local stealership. So my question is:

1) how long can I let this go until it blows out into the brakes or the bearing fries? I am just using it for kicking around town for now while back in town, plus I go to my mom's house which is 100 km away. I was thinking of doing a trip of maybe 500 miles next week. If it blows I can still limp home right? Just bring some extra diff oil.

2) maybe I can just replace the seal for now and get a bit more life out of it until I do the whole job?
You can drive for quite a while with it leaking and be ok. I guess it depends how long gear oil has been surrounding your bearing on that bad side. The gear oil works it's way into your bearing and slowly washes out the grease. Once enough grease washes out and you go for a long drive at highway speeds, the bearing can overheat and fail in a very dramatic way destroying your axle and also gouging the inside of your axle housing. A guy who drove around 3 hours to my last party had this failure. I guess he had ignored the rear axle seal problem for a long time.

If you really want to do this 500 mile trip, I'd make sure the gear oil hasn't made into your brakes yet at the very least. If your brakes have been affected, you're braking power will be diminished and your brakes will actually pull towards the non-affected side.

The gear oil in your picture looks pretty clean and hasn't mixed with the bearing grease so I'm guessing you're probably ok. You just don't want to ignore this issue for a long time. At some point, your bearing will fail.
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Old 09-25-2018, 06:32 AM #520
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From reading this thread, it seems like it might be a good idea to take advantage of a sudden influx of some 3rd gen 4Rs in the local junkyards and pull an axle to rebuild. I have a 2000 Limited 2WD with the single rear brake hose - what donor years and variants can I pull the rear axle from and be able to rebuild the bearings and seals with an eye to storing it then just swap it in should I need it? What years and what variants have what rear gear ratios?
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Old 01-02-2019, 11:23 AM #521
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Thanks!

Thanks to everyone! I had gear oil all over my passenger side wheel, so recently replaced both rear axle seals & bearings. The information in this thread was invaluable. I also relied on Timmy the Toolman's video and DrCoffee's flip the retaining ring method. Wouldn't have been able to do it without you guys.

So I now own a press tool to press on and off bearings and ABS exciters on these Toyota axles... I live near Winston-Salem, NC. If anybody nearby needs to do this project, drop me a message. I'm going to hang on to the press tool for awhile but I'm planning to resell it since hopefully I won't have to do this job again.
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Old 02-03-2019, 05:51 AM #522
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Thanks to the OP and other contributors to this thread. It benefits everyone to have information regarding this issue on hand.

I had my seals replaced today by my mechanic and I'm glad he showed me what he found. Turns out, the mechanic of course pressed the retainer too far inside and also messed up the bearing by incorrectly pressing it in.

This was the work of the previous shop. You can see that everything was pressed in excessively, causing a leak, despite new seals.



This is my mechanic's work. Note that instead of the grease test, he simply used some sort of crayon or chalk to indicate where the inner seal was touching the retainer. Definitely a cleaner and simpler way to determine how far to press it in.



Here are the old bearings, clearly installed incorrectly.



New vs old:



I'm pretty confident that leak won't reappear for a while now. Hope this information is useful. Also just another reminder that good mechanics are truly hard to find. I'd do the work myself, but I don't have the time, space or tools do these types of jobs anymore.

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Old 10-08-2019, 04:53 PM #523
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Got new tires put on a couple weeks ago and the tire guy showed me the dreaded signs of axle seal failure. Ordered all the seals and bearings from amayama today, came out to $149 after shipping and should be here in about 10 days. Only the bearings were in their warehouse apparently. I ordered extras of the cheap stuff, just in case.
Toyota 90313-48001 - SEAL, OIL (FOR REAR AXLE SHAFT OUTER) $2.94 x3
Toyota 90363-40020 - BEARING $35.55 x2
Toyota 90310-50006 - SEAL, OIL $3.31 x3
Toyota 90301-88077 - RING, O $4.03 x3
Toyota 90520-36045 - RING, SNAP $1.15 x3
Will be grabbing the HF 20 ton press since it's on sale, but hopefully finding someone local with the other tools to help make it happen, but considering all the money I'm saving, won't be too hurt if I have to buy them myself.

While I wait to accumulate all of the other stuff, going to go ahead and do the rear diff breather mod.

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Old 10-09-2019, 10:08 AM #524
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@nwguy Loaner tool: Rear Bearing Puller/Press Tool Loaner Program
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Old 10-09-2019, 10:56 AM #525
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Awesome, thank you for passing that along, I will look into that once I have a press in my shed. Do you still have the tool? What's your ETA for being completed with it?
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