Ford Performance IRS Loaded Differential Housing; 3.55 (15-24 Mustang GT, V6, Dark Horse)
$1,189.99
In Stock
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Description
Maximum Differential Performance. Take your Mustang to the next level with the Ford Performance 3.55 IRS Loaded Differential Housing. This fully loaded differential housing features components and a build quality that’s designed for maximum performance. Whether you’re working on a project Mustang for the track, or looking to upgrade your ’15 to ’19 daily driver into a weekend warrior, this differential housing is for you.Fully Loaded. The Ford Performance 3.55 IRS Loaded Differential Housing…
10 reviews for Ford Performance IRS Loaded Differential Housing; 3.55 (15-24 Mustang GT, V6, Dark Horse)
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TrackPack –
This was a direct replacement for the diff that my ’17 Mustang GT came with. Sadly the differential started leaking fluid after about 35k miles. Being out of warranty, my local Ford dealership wanted rebuild the differential for about $3k. I suggested that I buy this and have them install it. They said it would still cost $3k so I opted to purchase it myself and take it to a speed shop and have it installed for about $600 plus. So far no problems. Only issue was some of the fluid leaked out in shipping and had to be topped off.
Matto –
Was very happy with the part and the packing from the team over at American muscle will always get my parts from them
JonathanC –
This was the perfect change-up for my 2015 GT. Easy R&R in the garage, no messing with the gear set up. I’d gone from 3.31 to 3.73, but found the 3.73 too low. The 3.55 are perfect for my situation. Pic shows unpainted nodular iron. But mine came painted black. Pleased with that since it won’t rust up like the stock unpainted diff.
Hotwheels5oh –
It came in fast very well packed looking forward to having it installed I didn’t receive friction modifier with it but can always be purchased separately
MichaelG –
Very nice to just bolt right in where the factory one was.. full of fluid and ready to go. Great purchase
Edwinr1998 –
Great diff car drives so much better. Super excited to take it to the track and some quarter mile times
SexyC –
This thing made my car ride and it showed up at the time it said it would
CoryS –
This replacement differential was great for 700 miles on the street. After just (2) 10.3 second passes at the dragstrip, it HOWLED all the way home. Used on a 2019 GT 10R80 car. This shouldn’t happen. Pinion pre-load loosened up. Looking for a solid sleeve solution…..
Dymer –
2017 PP with gen 2 whipple making 800+whp. I originally had the 3.73 gears swapped for 3.31 which prevented the need to shift into 5th at the 1/4. The torsen had difficulty handling both tires spinning at once and would usually kick the rear out towards the driver’s side. This new 3.55 track lock diff keeps the car spinning forward instead of kicking out. The 3.55 gears also feel like a better ratio for driving around town. With 3.31 3rd gear around town would be sluggish. The 3.55 really woke the car up, without being as aggressive as the 3.73s and are still tall enough to allow 1/4 passes without leaving 4th gear. The only complaint I have is the differential was shipped without a plug in the temp sensor port, and all the fluid had leaked out by the time it was delivered, which ended up costing me an extra $60 for 2 quarts of royal purple and a bottle of friction modifier.
Billeh –
Product is good, especially if you have an automatic that came with 3.15 gears. However, I would highly recommend not shipping this item with the fluids inside. It will leak out during shipping resulting in the purchase of a replacement fluids.