Renegade_Medic
New member
New-ish axle shaft
After building some railing for my grandparents, I checked the salvage yards website and was shocked to see they put a 99 and a 98 4runner out today. I went home and grabbed my tools, and headed to the yard. It was a cool 96 degrees when I arrived and the nice wind was largely gone. It was HOT!
I found the pair of 4runners, side by side, with the interior already stripped from the 99. I was disappointed to see that neither had a locking diff, which would have made my day. But both had dry axles and brakes. The 99 has unknown mileage and the 98 had 278k. After looking at the axles for a minute, I decided to pull the 99s. The brake hard line was bent, it has been removed at some point, but it still had a somewhat rusty Toyota TEQ marked wheel cylinder. So I deduced the bearing, or at least the seal has been done on this one, I'd start there.
Pulled it without issue. Dry as a bone in the ABS ring area. It had a National axle seal in it and a Nachi bearing, which was tight and sounded good.
I got home and pulled the old one out. When the seals fail, they fail. I cleaned my brakes up 3 days ago and it was full of oil again. I did some more studying of the axle this time and discovered an error by the machine shop, I think.
Here's the original shaft, you can see where the seal has been riding, it's not anywhere near the edge. There is also some damage around the bevel.
"New" shaft has the retainer farther outboard, not really sire which is correct, but I have my suspicions.....
Here's a look inside the axle
The retainer has been hitting the inside of the axle housing. WTF?
For those unfamiliar, here's how the little crosshair thing inside the axle tube should look:
I will contact the machine shop on Monday and see what they say about this.
I decided to try out a National #1960 seal, why not? I compared the 2 seals, the national seal is smooth sealing, while the Toyota seal has little ridges on the sealing surface. I think the idea is to sweep away foreign debris/water. Also, I measured the inside of the seals. The National is almost 2mm smaller than the Toyota seal, so it may work better. It may also wear out faster.
Toyota seal:
National seal:
I put the first national seal in and did a grease test. I got a clean grease removal to the middle on the bottom, but it disappeared up around the top, or was very light. So i ripped that seal out and tried again. Same thing and the seal is flat inside the tube. Any ideas?
Also the vibration is gone!!! finally a vibration free lifted 4Runner! Many said it couldn't be done.....
After building some railing for my grandparents, I checked the salvage yards website and was shocked to see they put a 99 and a 98 4runner out today. I went home and grabbed my tools, and headed to the yard. It was a cool 96 degrees when I arrived and the nice wind was largely gone. It was HOT!
I found the pair of 4runners, side by side, with the interior already stripped from the 99. I was disappointed to see that neither had a locking diff, which would have made my day. But both had dry axles and brakes. The 99 has unknown mileage and the 98 had 278k. After looking at the axles for a minute, I decided to pull the 99s. The brake hard line was bent, it has been removed at some point, but it still had a somewhat rusty Toyota TEQ marked wheel cylinder. So I deduced the bearing, or at least the seal has been done on this one, I'd start there.
Pulled it without issue. Dry as a bone in the ABS ring area. It had a National axle seal in it and a Nachi bearing, which was tight and sounded good.
I got home and pulled the old one out. When the seals fail, they fail. I cleaned my brakes up 3 days ago and it was full of oil again. I did some more studying of the axle this time and discovered an error by the machine shop, I think.
Here's the original shaft, you can see where the seal has been riding, it's not anywhere near the edge. There is also some damage around the bevel.
"New" shaft has the retainer farther outboard, not really sire which is correct, but I have my suspicions.....
Here's a look inside the axle
The retainer has been hitting the inside of the axle housing. WTF?
For those unfamiliar, here's how the little crosshair thing inside the axle tube should look:
I will contact the machine shop on Monday and see what they say about this.
I decided to try out a National #1960 seal, why not? I compared the 2 seals, the national seal is smooth sealing, while the Toyota seal has little ridges on the sealing surface. I think the idea is to sweep away foreign debris/water. Also, I measured the inside of the seals. The National is almost 2mm smaller than the Toyota seal, so it may work better. It may also wear out faster.
Toyota seal:
National seal:
I put the first national seal in and did a grease test. I got a clean grease removal to the middle on the bottom, but it disappeared up around the top, or was very light. So i ripped that seal out and tried again. Same thing and the seal is flat inside the tube. Any ideas?
Also the vibration is gone!!! finally a vibration free lifted 4Runner! Many said it couldn't be done.....

