I'm new to this Forum, so my first post will be a Mega-Post. I've got a 2000 Tundra 4x4 with 125k miles on it. I bought it back in April of 2008 and I noticed after a few weeks of owning it that the Ebrake didn't work very well. Then I noticed the rear right wheel/drum was saturated in 90W. Since then I've been still driving it trying to figure out what to do. Now both are leaking.
Turns out that back in 2004 the previous owner had the seals replaced because the factory seals were leaking. Now it is leaking again. I have the list of parts from the work order and I've been piecing together the pieces of the puzzle to get to where I am now..
I also started a thread on Tundra Solutions, but none there have done this on a 2000-2002 tundra with ABS..
Diagram of Axle and drum brakes. I am basically going to replace everything with a Dot by it except the gasket between the drum and axle:
Rear left Brakes with Drum off:
Drum After I cleaned it:
Removal of the main spring on the Brake shoes:
Brake Shoes After removal:
The brake cylinder would push out the plungers under just the weight of fluid in the system so I clamped the the plungers. I later put a c-clamp on the brake line up right above the differential where the only rear brake line hose is:
Pulled the Axle:
Here is the drawing that shows how far to press the ABS sensor rotor and retainer:
Old seal and axle case:
Here is the sensor and retainer, You can see the axle has a notch where the previous tech ground down the old retainer to far and nicked the axle.. Creates a nice channel for 90w to leak out..
Here is the most current parts list for this job as far as I can tell:
Toyota Part numbers:
90310-50006 inner seal (Updated per TSB)
43517-35010 Rotor (Skid Contro)l
42423-20010 Retainer (Bearing and Skid Rotor)
90520-36045 snap ring
90313-54001 outer seal
90363-40068 Bearing Rear
04495-35230 Toyota shoe kit
Turns out the TIMKEN bearings have the same markings on them as the ones the dealer used in 2004. These bearings were much cheaper then the Toyota ones, and they are the SAME Bearings!!
I ordered the Bearings and Shoe kits from RockAuto. I ordered everything else from 1sttoyotaparts. I was very happy with both of their speed and service and shipping charges..
So at this very moment. I'm still trying to see if I can salvage the Rotors, or if I need to cut them off like the service manual suggests. I'm going to a Machine shop tomorrow.
I'm guessing that the leak was from the previous Toyota Tech grinding the notch under the retainer creating a nice channel for 90w to leak out. The seals look great, the surface that the seals ride on (ABS rotor Retainer) look great. The seals were updated to after the TSB, but the part number is not the same as the on in the TSB. I'm going to replace them anyway and use Sealer on the new one between the seal and axle housing.
Looks like you're on the right track to me. One critical thing to note when you have ABS and you also replace the bearings is the diagram that you've posted about how far to correctly press on the ABS ring and the retainer ring. There is a gap between the ABS ring and the end of the bearing. Many techs don't realize that and just smack all the pieces together. If you smack them together, the retainer ring doesn't make a proper seal against the inner axle seal. If it immediately leaks again after the bearing was replaced, you know the tech likely messed up the spacing there - plus if you look at the ABS tone ring through the axle housing where the sensor goes, you'll see that it's not centered like it should be. One tech I talked to said they sometimes smack all the pieces tight together and then add 2 retainer rings in the hopes that that will be OK with the seal there. I don't have experience to know if that method actually works though. Good job on noticing the need for correct spacing there. I'm just reiterating its importance after a painful experience for me related to that topic.
Another thing to note is to be sure the C-clip or snap ring or whatever it's called is properly in place to hold the bearing there. Otherwise, you can lose the entire wheel and axle as you watch it pass you on the road. I've heard a couple people describe that one.
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