The 6R140 is a strong transmission. The lines feeding it are not the strong part. On 2011 to 2019 6.7 Power Strokes, the factory transmission cooler lines run plastic quick connects and rubber sections that get cooked over years of towing heat. They get brittle, the connectors crack, and they start seeping right where you cannot see it. By the time most guys catch it, they are chasing a slow leak that has already run the transmission low more than once.
Low fluid on a 6R140 is how a good transmission gets killed. It is not the transmission that failed, it is the twelve year old line that finally gave up.
Why the Factory Lines Go
- Plastic quick connect fittings get brittle and crack with heat and age
- Rubber sections swell and weep, usually at a connection point
- Towing heat speeds all of it up
- A slow leak runs the trans low long before you get a warning
The Fix: A Direct Braided Replacement
We build a factory replacement line kit in real AN braided hose with proper fittings that bolts right back into the stock locations. No plastic to crack, no rubber to rot. It is the same approach that made our Cummins line kits our number one selling category, applied to the Ford.
Pick by year:
| Truck | Kit |
|---|---|
| 2017 to 2019 6.7 Power Stroke | 17 to 19 6R140 Replacement Line Kit |
| 2011 to 2016 6.7 Power Stroke | 11 to 16 6R140 Replacement Line Kit |
Do It Before It Strands You
This is a part you replace on your schedule in the driveway, or on the tow truck's schedule on the side of the interstate. If you tow with your 6.7, do not wait for the leak to find you.
Shop the Ford 6R140 Line Kits →