Hi Folks,
I own a 1978 2WD Hilux, RN28, 5 lug axle
My brake shoes were soaked with diff-oil.
Yesterday I replaced both the outer and inner axle seals, fixed the O-ring (small rip but still in one piece, fixed and enforced it with black liquid gasket > dealer couldn't get a replacement and it wasn't part of the bearing set) and the bearing (although the bearing was in excellent condition). I also replaced the wheel cilinder and ofcourse the brake shoes, and I bled the brakes. The diff breather isn't plugged and I refilled the diff up to the level where the gear oil level is just barely below the filler plug.
Despite all this, the leakage is still present. It seems to be coming from the outer oil seal (which I replaced, although the old one seemed just fine).
I performed the whole procedure very carefully, especially the parts where I could damage the seals.
Right now I'm not sure what to do anymore. There is some excessive wear on the inside of the tire on that side, maybe that's a clue?!

Any tips, clue or advice would be very welcome!
Thanks!
Michel

 

is it brake fluid or gear oil ?

 

Welcome to Yotatech!!!!

Maybe they gave you the wrong seal?

 

It's gear oil. The seal matched up exactly with the old one. Maybe I drove it in too far?!

 

Underinflated tire sounds like the reason for the wear. I'm assuming this isnt a static leak? It's just noticed after driving? I'm not really sure how the oil is getting past the bearing to get INSIDE the drum?? That's weird.

 

What size is the rear-end? I have a 1980 yota 4X4 and it is like a 9" Ford. If it is the same I had that problem. I used a rear main seal inplace of the OEM rear-end seal. The seal fits tighter than the OEM. Let me know if it is and I will get you the part number. I replaced mine and no sigh of leaks so for!!

 

Is your diff breather plugged up if so thats ur issue if the diff has no where to bleed of pressure and gases its going to try and go somewhere and its usually those seals. You may need to replace the breather and the inner and out seals on the axles.

 

The name escapes me, but the machines surface of the axle shaft where the seal rides on...if that's worn (which is very well might be considering the vehicles age) you will keep leaking gear oil.

Try removing the axle again and inspecting the area where the seal makes contact (the area will be shiny compared to the rest) and if it's bad it will be quite noticable.

If that's the case, you have two options...use a press to remove and replace that "part" on the axle shaft that's worn or you can tweak the seal to ride further in on the axle shaft to miss the worn area completely. If you do the latter, make sure you don't go too far and stay on the section of the axle shaft that is machined to accept the seal.

I know my terminology is not quite up to par, but I hope it makes enough sense to understand.

Best of luck...

 

The breather on the axle is probably clogged up, combine that with the gear oil getting warmed up and softened by the heat/friction made when the gears are doing their thing and it will leak right past some bad seals and/or bearings on that rear axle.

Drain that rear axle and put some new 80w gear oil in there or better. Put some new bearings and seals in it. Slap a fresh coat of paint on it and you should be good.

 

As far as I know a 1980 yota will have the same type of rear axle as my "78 yota, so if you can give me that part number, that would be great! Thanks

 

ok it took me a while to find the box. I got the seal at ABC Autoparts. I am sure if you can find a parts store that sells parts master they will have it or can get it. If there is any thing elese I can help you with let me know. I have became a pro at finding what will work when you can't get OEM part. LOL Michael
Parts Master
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