I have noticed that the vent on my rear differential is leaking. I was doing some searches and found tsb 12-8-12 about a leaking vent. Has anyone heard ever heard of this or seen this? Also does anyone have the full details of this tsb?
Rear Diff Leak
- Thread starter Swag
- Start date
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Crash712us
Chasing my tail
Never on rear dif, but have on ptu.
Yeah the fluid is coming from the rear differential vent. I cannot find any specific details of the bulletin. All I can find on is is that affects many other ford vehicles and it states the leak is from the vent on the RDU when it is less than 32 degrees Fahrenheit.
And it's funny you say about the PTU, I just had it replaced about 10k and now I am seeing little black drips on the cement under the car. It smells like gear fluid not oil so I am guessing it is leaking again. I have not jacked it up yet to for sure see where the PTU is leaking at. So I have a rear diff leak and a PTU leak.
Maybe the fluid was overfilled in the RDU? May need to replace the vent or reseal the vent threads with PTFE tape. On the Mustangs, they actually replaced the vent with a bulb-type design:
BTW, you have not had your PTU or RDU submerged? If you have, then a fluid exchange and/or unit replacement is recommended.
BTW, you have not had your PTU or RDU submerged? If you have, then a fluid exchange and/or unit replacement is recommended.
Ok got the car back a few days ago, they had to fix a leaking seal on the PTU. They stated the fluid coming from the vent is normal with the cold temperatures. So I went even further and asked them about this TSB. The tsb states that if the fluid coming from the vent is beyond normal (which I think it was), is to replace the vent and gives a part number. So I ordered the part for 9 bucks from Tasca Ford. Just need to put it on. The part number was DB5Z-4022-A. Just in case if anyone else thinks there vent is leaking to much.
Wow old thread. So I did see a drip of fluid ...which was bright green as it was extremely low mileage. I felt around and felt what evidently is the RDU vent. Not very secure as I could move it all around. When I changed the fluid it was like new, plug magnet was clean as a whistle. Cleaned up when done so I'll keep an eye out for future drips. I've only filled with the car level and so it's never been overfilled. The front of the car was on jack stands for 6 months prior...hmm. The drip never made it to the ground, was off center towards driver side on the cover.
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