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petepetrolhead
10-07-2025, 10:51 AM
I can't see any fitting in my kit (Gen3 Coupe) to install a breather in the IRS rear end. There is a 3/8" (or maybe 10mm) vent hole which I expected to be threaded to take a vent fitting but it's a smooth bore (see attached photo). I'd be grateful for suggestions as to what fitting can be used to connect a vent or breather pipe - presumably it has to be push in? Thanks for your help.219885

gbranham
10-07-2025, 11:04 AM
The fitting is in a small bag inside the box the differential came in. Mine was hiding under the expanding foam the diff was sitting in. Its a press-in fitting.

petepetrolhead
10-07-2025, 01:28 PM
The fitting is in a small bag inside the box the differential came in. Mine was hiding under the expanding foam the diff was sitting in. Its a press-in fitting.

Man I owe you a beer! The box was out for the trash and I found the fitting just in time - right where you said it would be - I had never lifted the bottom foam packer! Thank you!

gbranham
10-07-2025, 02:09 PM
Man I owe you a beer! The box was out for the trash and I found the fitting just in time - right where you said it would be - I had never lifted the bottom foam packer! Thank you!


Schweet! Good save! You'd think they would pack that tiny piece in a bit more obvious location. Or, you know, install it before it leaves Ford's manufacturing facility.

Greg

rickshank
10-07-2025, 05:29 PM
I just went through this over the weekend. The vent is likely either somewhere in my shop under a cabinet or at the bottom of my outside trash bin. I ordered a new one online and it'll be here Friday. I'm sure I'm not the first.

petepetrolhead
10-08-2025, 04:08 AM
I just went through this over the weekend. The vent is likely either somewhere in my shop under a cabinet or at the bottom of my outside trash bin. I ordered a new one online and it'll be here Friday. I'm sure I'm not the first.

Bad luck Rick - it really isn't great that Ford don't pack them so they're more obvious :-(

Aleinsteingenius
10-08-2025, 06:58 AM
I almost threw mine out as well.