Leaking DCT lines? Ford has a new solution...

[Epiphany]

...and it involves 3 components. A new rear line assembly (actually two lines in tandem) and two stubs that attach to the lines, run into the case and are secured by new design flanges.

I'll try to illustrate as best I can for those that may not be that familiar with the hardware I'm speaking about. In the following photo you see a side by side view of the older 2020-2022 rear line section beneath the new section, designed for the 2026 Dark Horse SC. This new part(s) will also be specified as the service components for the aforementioned GT500 cars. Again, new part on top, old on bottom...

The blue caps attached to the end fittings on the new assembly attach to a pair of stubs that then go into the transmission case.

Here's a quick video that may explain it better. No Star Wars soundtrack added.



It's late, more on this when I can. The Guru played a pivotal role in discovering all of this and nailing down the requisite hardware information that has yet to be listed by Ford in their parts catalog.

Sponsored

 

[TonyNJ]

Very cool and very interesting. That's probably one of the many little upgrades coming with the new DH SC.

 

[Epiphany]

That's probably one of the many little upgrades coming with the new DH SC.

I think I mentioned a few times that this is the hardware that was designed for the '26 DH SC as well as being designated as the latest service component for '20-'22 GT500's. Without the SC, I don't think Ford had plans to do the right thing and finally mitigate the leakage issue/potential that the original design had.

 

[TonyNJ]

It's late for me too. I saw you mentioned that. I meant it as, "there are probably a few other fixes and upgrades coming along like this one, as well."

 

[TonyNJ]

Maybe they will have a better solution for the active exhaust harness rubbing and the clunk a lot of us get in the steering linkage on hard slow turns after some wear.

Other than tranny lines and AE, the GT500 has been pretty stalwart. Looking forward to seeing more details on the SC.

 

[Epiphany]

...there are probably a bunch of other fixes and upgrades coming along like this one, as well.

I hope that's the case!

 

[Inthehighdesert]

I haven’t messed with the 500 yet. Any idea how much of a pain it is or isn’t to swap the lines? Any idea if the parts are actually available? Found listings for the lines but the fittings weren’t coming up.

I think I mentioned a few times that this is the hardware that was designed for the '26 DH SC as well as being designated as the latest service component for '20-'22 GT500's. Without the SC, I don't think Ford had plans to do the right thing and finally mitigate the leakage issue/potential that the original design had.

 

[Epiphany]

The two small fittings are on national backorder. It would seem Ford gobbled them all up at this point for soon to be manufactured DH SC's. But yes, you can order them.

I know of an install taking place today so I'll get back to you on it.

 

[Epiphany]

You saw it here first, a legit factory fix for failure prone lines that could save you a pretty chunk of change if your GT500 is now out of warranty and your lines shit the bed. The stub inserts fit the DCT case perfectly, as they well should. The only potential question at this point is should you substitute a slightly longer bolt instead of reusing the original factory bolt. I would recommend you do. Factory bolt is claimed to be M6 x 15 in the catalog. I would suggest a longer fastener and I'll address that in a subsequent post down below. You lose some thread engagement on the original bolt due to the increased flange thickness. Beyond that, this is a simple install where you may just need to add some fluid. Install in this case required adding about 3/4 of a quart that was lost due to cracking the lines open and what was in the lines themselves.

Two other small pieces of hardware complete the installation. In the photo above you can see them between the square aluminum head at the end of the line, and the case. They are in essence, a "kind of" backup latch to the spring loaded clip that retains the hose end assembly in place.

HUGE thanks to the Guru for discovering all of this. It started with getting a Dark Horse SC VIN, studying the HVBOM, comparing new numbers to old, some logical interpolation, firing off a few technical questions to corporate, and then snagging the only hardware available nationwide. Of note, Ford built between 20 and 30 pre-production 2026 Dark Horse SC's in December of 2025 and those cars showed new part numbers beyond the very line assemblies that our beloved GT500's used. Since then, Ford changed the part numbers again and the hardware I'm showing here is the latest and greatest. So it looks like Ford put forth a good faith effort here to finally mitigate the issue of leaks in the lines. Without the DH SC, we likely would not have this.

 

[MAGS1]

Looks like Ford built a better mouse trap for the DH SC. Not to deviate from the convo, but saw the video on the Braptor and the busted bracket that’s supposed to be holding your pipes steady in the engine bay. Did it come that way from the factory or did something happen and it broke unnoticed?

 

[Epiphany]

Looks like Ford built a better mouse trap for the DH SC. Not to deviate from the convo, but saw the video on the Braptor and the busted bracket that’s supposed to be holding your pipes steady in the engine bay. Did it come that way from the factory or did something happen and it broke unnoticed?

Came that way. I immediately noticed the amount of play or movement the tube had but didn't yet associate it with the broken tab bolted down elsewhere. It's a poor design. It takes very light pressure and you are very close to fracturing it. Good thing is, the tube can get by without it.

 

[MAGS1]

Came that way. I immediately noticed the amount of play or movement the tube had but didn't yet associate it with the broken tab bolted down elsewhere. It's a poor design. It takes very light pressure and you are very close to fracturing it. Good thing is, the tube can get by without it.

That sucks that it’s such a flimsy design. I wonder if a reinforcement of some kind can be had (or designed and 3D printed)?

 

[Epiphany]

Its all good. The truck is badass and I don't even think about it because if it broke again, meh, it really doesn't go anywhere.

 

[OX1]

Great job on this..........

For ease of PN/Price hunting (Discount prices are local to me in NJ....)

Tube Assembly (Lines) ............................................ KR3Z-7R081-E List $372 Disc $256
Tube Assembly (90 Deg Fittings, two)............ TR3Z-7R081-A List $273 Disc $205 (National Backorder)
Cooler Pipe Retainer Clip (two).......................... 8C3Z-7Z465-A List $11.68 Disc $9.11

Total List $941.36 Disc $684.22

Lot of cabbage for something that should probably have been a recall, but
fried DCT would be a much bigger headache, even under warrantee.

 

[Epiphany]

Lot of cabbage for something that should probably have been a recall, but
fried DCT would be a much bigger headache, even under warrantee.

I agree on all counts. If anything, attaining peace of mind with respect to staving off a potential failure and loss of the transmission makes it all worth the price of admission.

Sponsored