Rear Wheel Bearing Leak???

[ATXTremor]

Hello, I noticed a green fluid leaking onto my wheels today while drying my truck after washing it. See pic.

It's a 2000 Ford Ranger XLT 3.0 V6 with approximately 146,500 miles. It's 2 wheel drive.
I've changed the rear differential fluid in September 2024 when she had 140,500 miles. A few weeks later in October of 2024, I replaced the rear brake cylinder on that exact wheel along with a new brake line. You'll notice some signs of that wheel brake cylinder leak circled in red on one of the pics.
I've repacked/regreased the bearings before but for the life of me, I can't remember when. It's been that long.

Based on the pics, can someone tell me if this is leak coming from the wheel bearing or axle? Thanks.

 

[scotts90ranger]

I've never heard of the axle leaking itself there so I would suspect the shaft seal, makes way more sense... I would also check the axle breather tube to make sure it isn't plugged up, I had a serious issue with my F350 axle seals just because the vent was plugged...

 

[Curious Hound]

The question is "what fluid back there is green?". Differential oil leaking from axle seal would not be that color. And I've never seen green brake fluid. If it was at the front, I would be looking for a coolant leak.

 

[SenorNoob]

I've seen gear oil that could be described as green. It was VERY high viscosity even for gear oil though. Approaching grease. You'd have to have a massive hole to leak that much.

 

[alwaysFlOoReD]

My guess is the slave cylinder is leaking. Its directly above the where the signs of the leak are. Tho a clogged vent would show the same pattern.
The other pic of the green fluid baffles me. As curious hound said, nothing back there is green.

 

[scotts90ranger]

Best to touch it and see if it's slippery or not and which stench it aligns with, brake fluid or gear oil... but yeah, I wouldn't rule out either, best to pull the tire and check... as for color cameras can trick and I've seen green brake fluid but it's usually too thin to pool like that.

 

[broncc]

To me it looks like the brake line fitting wasn't tightened enough when it was replaced. 1/4 turn should solve your issue. Stick your finger in the fluid and rub it. You can tell pretty quick what fluid it is.

I would pull the tire and drum to inspect your brake shoes to see if they're wet. Gear oil and brake fluid are both things you do not want saturating the friction material. Also check your brake fluid reservoir. It may be low.