Doc's Diesel Transmission Filters are made to keep your rig shifting smoothly and running right. They trap dirt and debris that can wreck key parts like the torque converter and fluid pump. A clean transmission filter means less heat, less wear, fewer costly repairs, and puts less strain on your engine, which means better fuel mileage.
Vehicle Fitment:
Interchange:
DF-89
Above all recommendations, change according to your vehicle’s manufacturer’s warranty.
Note: Most OEM recommendations are based on regular driving, NOT hauling. Doc’s Diesel recommends changing transmission filters earlier than OEM recommended guidelines for preventative maintenance and to ensure the longevity of your transmission.
Ready to wrap it up? Hit the Buy It Now button at the top of the page. Please note that the Pay Now button is ONLY available after completing a Buy It Now purchase.
Spend $99 or more and we’ll ship your order free anywhere in the lower 48.
Not satisfied? No problem. You’ve got 30 days to send your parts back as long as they’re unused and in new condition. Just start a return through eBay and we’ll handle the rest.
At Doc’s Diesel, we make truck maintenance simple and affordable with parts that last. We started with premium filters that meet or beat OEM standards—and we didn’t stop there.
Now we offer brakes, hubs, wipers, oil, and more for Cummins, Powerstroke, Duramax, and EcoDiesel. Everything’s lab-tested and work-tested.
Based in small-town Ohio, and built on hard work, no B.S., and doing the job right.
Got questions? We’re here for it. click here to reach out and we’ll get back to you ASAP.
Copyright ©
Doc's Diesel 2026.
All rights reserved.
Layout designed by Ninja Templates.