06/24/2026
This 2017 Ford F-250 came in for a serious 6R140 transmission upgrade.
We installed a built transmission rated to support 800 RWHP, but the real goal here is strength, reliability, and better holding power.
This setup is built for 6.7 Powerstroke trucks that work hard towing, street use, or competition.
One of the key upgrades in this build is the Warren Diesel Shop 10-pack stroked overdrive drum.
The factory overdrive drum uses 7 clutches. This upgraded drum is precision-modified to fit 10 high-energy clutches, giving the 4-5-6 overdrive clutch pack a lot more holding power. That helps reduce shift flare, control heat, and improve reliability in high-power 6.7 Powerstroke applications.
Whether it’s towing heavy, making big horsepower, or getting driven hard, the 6R140 needs the right parts inside it to live.
Another solid upgrade finished up here at ZKB Performance Diesel