2025-2026 Ram 6.7L Cummins Filter Kit Guide (68677800AA)

The first time I opened the hood on a 2025 Ram 2500 with the 6.7L Cummins, I went looking for the oil filter and could not find it. No spin-on canister down by the frame rail, nothing tucked behind the wheel well. I spent ten minutes on my back under a truck that did not need me under it, before it clicked: the entire filter service had moved topside. That is genuinely good news, and it is also exactly why so many owners order the wrong parts right now.

Why the 2025-2026 Cummins Filter Job Is Nothing Like the Older Trucks

For roughly two decades, the 6.7L Cummins oil filter was a spin-on can you reached from underneath, and the fuel filter lived down on the frame rail. On the 2025-2026 trucks, that layout is gone.

The oil filter is now a top-load cartridge element that drops into a permanent aluminum housing on the passenger side of the engine bay, sealed by a threaded cap. The fuel system uses two top-load cartridges - a primary water separator and a secondary fine filter - both serviced from above. The engineering reason is straightforward: less waste, a larger element with more pleated surface area, better dirt-holding capacity, and stable flow. The practical reason you care is that the whole service is now a stand-over-the-fender job.

The catch is that "the same 6.7L" now covers two completely different filter systems. The 2007.5-2024 trucks took a spin-on oil filter (Mopar 5083285AA) and a different fuel filter design. The 2025-2026 trucks share exactly zero of those parts. If a listing says "fits 6.7L Cummins 2007-2026," it has not understood the redesign, and the part will not seat.

One naming note before we go further. This kit is often listed with the word "Air" in the title, but the filter in the box is the cabin air filter - Mopar 68548579AA, the activated-carbon HVAC element that lives behind the glovebox. The engine air filter (53034051AB) is a separate part and is not part of this set. If you want the engine air filter too, order it on its own.

What You Actually Get: Five Elements, Four Service Positions

The kit covers the full filter service on a 2025-2026 Ram 2500, 3500, 4500, or 5500 with the 6.7L Cummins — SKU TTK-R-26-01/26-02/24-05/24-04. The fuel side is a pair of cartridges rather than one, so the box holds five elements across four service positions — and each element does something the others cannot.

Fuel filter - 68677800AA (dual-stage). This is the one most owners get wrong. It is not one filter; it is two cartridges: a 5-micron primary water separator and a 3-micron secondary element that uses NanoNet microfiber as a distinct, visible layer. Together they strip water and sub-micron particulate before the fuel ever reaches the high-pressure common-rail pump. The primary has a silicone-treated cellulose outer layer whose entire job is water-from-fuel separation. Cheap listings sell you one paper element wearing the 68677800AA number, which quietly deletes the water separator.

Oil filter - 68677810AA (top-load cartridge). A synthetic-blend cartridge that replaces the old spin-on canister with an unthreaded, waste-reducing element. It catches soot, metallic wear debris, and combustion sludge. On this engine that matters more than on a gas truck: the turbo's journal bearings ride on an oil film only microns thick, and a cartridge that collapses or bypasses early does not just wear the engine, it starves the turbo. Mopar's part is made by Fleetguard, and the same physical filter sells as Fleetguard LF16453 - more on that in the price section.

Transmission filter - 5013470AE. An internal 68RFE sump filter. It sits inside the transmission pan and traps clutch friction material and metal fines before they reach the valve body. Two things to check before you count on it: it fits trucks with the 68RFE 6-speed automatic (most standard 2500 and 3500 pickups) and it does not fit the Aisin AS69RC heavy-duty transmission. If you are unsure which you have, the 68RFE has a dipstick tube on the passenger side of the engine bay; the Aisin is serviced through a case-side plug.

Cabin air filter - 68548579AA (activated carbon). The HVAC element behind the glovebox. Standard paper cabin filters catch dust and pollen but pass gaseous odors straight through - and on a diesel that means raw exhaust, crankcase fumes, and DPF regen smell. The carbon layer is the only part of the filter that adsorbs odor; if the listing does not say "activated carbon" or "charcoal," it will not do anything for smell.

What You Actually Pay: Mopar, Doc's, Amazon and eBay

Here is the live price landscape, checked in October 2026. Treat it as the shape of the market, not a quote.

Three honest observations.

First, the OEM route is the expensive one, and not by a little. Buying all four filters separately from Mopar adds up to roughly $258-314, across four part numbers and four shipping charges. Have a dealer do the work and owners report $500-800 for a job that now happens entirely from the engine bay.

Second, the cheap listings are not the same product. When the same part number trades between $17 and $35 on eBay, something changed, and it is not the shipping. The $17 listings are typically a single paper element sold under a two-cartridge part number. It threads in and fits, then it passes water and fine particulate straight to a fuel system that runs north of 30,000 psi. On an engine whose pump failure is measured in thousands of dollars, that is not a saving - it is an unquantified bet.

Third, if you are chasing the floor price, buy the Fleetguard number. The oil cartridge is the easiest place to save money legitimately: Fleetguard LF16453 is the same filter Mopar boxes, and it trades around $21-26 from diesel shops versus $39-60 for the Mopar box. Nothing is different but the label. This kit does not pretend to be the cheapest oil filter on the market - what it buys you is the correct part number in one box with fresh O-rings, so you are not gambling on fitment or making a second trip.

What to Look For When Buying

1. Dual-Stage Fuel Filter Verification (68677800AA Set). Confirm the listing includes TWO distinct fuel cartridges: the 5-micron primary water separator and the 3-micron secondary fine filter. Beware of cheap single-element knockoffs.

2. Microfiber NanoNet Technology. Verify the secondary fuel element features genuine synthetic NanoNet microfiber layers designed to trap sub-micron contaminants before they reach high-pressure common-rail injectors.

3. One-Time-Use Housing O-Rings Included. Ensure fresh rubber sealing rings are included for all cartridge housings. Reusing heat-cycled O-rings causes air leaks on the suction side, inducing fuel pump cavitation.

4. Year Cutoff & Part Number Verification. 2025–2026 Cummins trucks require 68677810AA (oil) and 68677800AA (fuel). Ignore listings claiming "fits 2007–2026" — earlier models use older spin-on canisters.

5. Transmission Identification (68RFE vs Aisin AS69RC). The included transmission filter (5013470AE) fits the 68RFE 6-speed automatic transmission only. It does NOT fit the Aisin AS69RC heavy-duty transmission. Check for a transmission dipstick on the passenger side.

Installation Guide: Step-by-Step Order

Step 1: Replace Dual-Stage Fuel Filters (68677800AA). 

1. Open the primary housing drain to discharge accumulated water/fuel into a catch pan.
2. Unscrew caps using a 28mm 6-point shallow socket. (Never use 12-point sockets or strap wrenches).
3. Remove old cartridges, install fresh O-rings, and seat new elements by hand until clicked into place.
4. Hand-thread caps and torque to specified spec printed on cap. Do NOT pre-fill housings with fuel.

Step 2: Replace Top-Load Engine Oil Filter (68677810AA). 

1. Pull Filter First: Unscrew the center pressure-relief plug, then loosen the main 28mm cap to allow oil in the housing to drain back into the sump.
2. Remove old cartridge and push new 68677810AA element onto center stem by hand until it CLICKS firmly into place.
3. Lube fresh cap O-ring, hand-thread cap, and torque to 18.5 ft-lbs (25 Nm).
4. Drain oil pan via 3/8" square drive plug, reinstall plug (35 ft-lbs), and refill with 12 quarts of 5W-40 / 10W-30 MS-10902 oil.

Step 3: Service 68RFE Transmission Filter (5013470AE).

1. Drop transmission pan and drain fluid into a collection pan (approx. 7–8 quarts).
2. Remove old 5013470AE sump filter, clean pan magnet and sealing surfaces, and press new filter into valve body inlet.
3. Reinstall pan with fresh gasket and refill with approved ATF fluid.

Step 4: Replace Cabin Air Filter (68548579AA) & Key-ON Priming.

1. Lower glovebox by releasing damper cord and side stops.
2. Remove HVAC access door, slide fresh 68548579AA carbon filter in with AIR FLOW arrow pointing DOWN, and snap door back on until you hear two clicks.
3. Key-ON Priming Sequence: Turn ignition to RUN without starting to allow the electric lift pump to purge air from fuel lines. Cycle 6 to 8 times until pump tone steadies before cranking engine.

Five Expensive Mistakes

Buying a single-element "68677800AA." The most common and most costly mistake. The two-cartridge design is the whole point of the part number. One element means no water separation.

Running an oil cartridge that does not fit the housing. 5083285AA (the old spin-on) and 68677810AA share nothing. A cartridge that does not seat correctly will not hold pressure, and the warning sign is a low oil pressure reading you may not notice until damage is done.

Ordering the transmission filter for an Aisin truck. 5013470AE is 68RFE only. If you have the heavy-duty Aisin, this filter is money spent on the wrong part.

Skipping the prime. Filling the fuel housings by cranking the engine sends air and unfiltered fuel through the system. Prime with the lift pump first, every time.

Assuming the cabin filter is optional. It is the cheapest filter in the set and the one that addresses diesel odor inside the cab. Owners who skip it spend years convinced the smell is normal.

What Changed, and Why It Actually Matters

It is worth stepping back for a moment on why this redesign is not marketing. The older spin-on oil filter design forced a trade-off: the canister has to be small enough to thread into place from underneath, which caps how much filter media it can hold. A top-load cartridge in a permanent housing removes that constraint. The element can be taller, hold more pleats, and carry more dirt before it loads up - all without the housing itself being thrown away every service.

The fuel side benefits the same way. Splitting the fuel filter into a dedicated primary water separator and a dedicated secondary fine element lets each stage be optimized for one job instead of compromised between two. The separator exists to pull water; the secondary exists to catch sub-micron particulate. When a cheap kit merges them into a single paper element, both jobs get done badly, and the high-pressure pump pays for it.

There is also a real waste argument. Replacing a cartridge means replacing a few ounces of filter media and an O-ring, not a steel canister and its housing. Over the life of a truck that is a meaningful reduction in what goes in the bin, which is the direction the whole industry is moving.

None of that changes what you do on service day - it changes what you should expect from the parts you buy. A kit that ships the correct cartridge count, the fresh seals, and a part number already cross-referenced to the Mopar and Fleetguard numbers is not charging you for the box. It is charging you for not having to guess.

Frequently Asked Questions

Does this fuel filter fit older 2019-2024 Ram Cummins trucks?

No. The 68677800AA is specifically designed for the updated fuel housings on 2025-2026 models. If you drive a 2019-2024 truck, that platform uses different fuel filter part numbers, and the 2025-2026 cartridges will not seat correctly.

What is the difference between the 68677810AA oil filter and the older 5083285AA?

They are completely different designs. The 5083285AA is a spin-on canister used on 2007.5-2024 trucks, removed from underneath. The 68677810AA is a top-load cartridge element that drops into a permanent aluminum housing on the 2025-2026 engine. They share no parts and do not interchange.

Is the included transmission filter compatible with all 2025-2026 Ram trucks?

No. The 5013470AE fits trucks equipped with the 68RFE 6-speed automatic transmission, which covers most standard Ram 2500 and 3500 pickups. It does not fit the Aisin AS69RC heavy-duty transmission. Check your dipstick: the 68RFE has one on the passenger side of the engine bay.

What are the recommended replacement intervals for these filters?

Two sets of numbers matter here, and they disagree — so here is both of them, honestly.

What Ram's 2025 schedule says. The oil filter interval is unchanged at 15,000 miles. (The hard ceiling of 8,000 miles / 12 months / 350 engine hours belongs to the gasoline engines, not the Cummins — one of the most misread lines in the whole book.) Dual-stage fuel cartridges: 15,000 miles. Cabin filter: 12,000 miles. Engine air filter, which is not in this kit: 30,000 miles. CCV filter: 75,000 miles. And the one place 2025 genuinely changed the math — the 68RFE fluid and filter service moved out to 120,000 miles, up from 30,000 for the fluid and 60,000 for the sump filter on the 2019-2024 trucks.

What we would actually do. Oil filter every 7,500 miles — or 5,000 if you tow or work the truck hard. Transmission filter every 30,000 miles. Those are the severe-service numbers, and on a truck that earns its keep they are the right ones. A 120,000-mile transmission interval is a book number for a truck that never sees a trailer; it is not a plan for a truck that pulls one.

How to square the two. The schedule tells you the longest you may go. It does not tell you the longest you should. Run the shorter figure when the truck is working, and let the Oil Change Indicator pull you in earlier still if it asks. If your fuel or climate is poor, or you idle a lot, move both numbers down rather than up.

Why should I add the 68RFE transmission filter to my order?

Changing the transmission filter removes abrasive metal particles before they reach the valve body. Two things worth knowing before you plan it. First, the 2025 schedule puts the 68RFE fluid and filter service out at 120,000 miles, which is far longer than the 2019-2024 trucks called for — so do not let the loose book interval talk you out of servicing a hard-worked transmission earlier. Second, skipping the filter on a towing truck is one of the ways a 68RFE starts shifting roughly, and the valve body is the most expensive part of the transmission to replace.

Is this kit cheaper than buying from the dealer?

For the four filters, yes. Buying all four separately from Mopar runs roughly $258-314, and a dealer doing the work runs $500-800 with labor. This kit puts all four in one box at $208.80, and the whole job is now a DIY service you can do from the engine bay.

Can I buy just the Fleetguard oil filter instead?

Yes, and it is a legitimate way to save money. Fleetguard LF16453 is the same physical filter Mopar boxes, at roughly $21-26 from diesel shops versus $39-60 for the Mopar-labeled box. What this kit adds is the correct cross-referenced part number, the O-rings in one box, and everything shipped together.

Do I need to pre-fill the new fuel filter cartridges?

No. Do not pre-fill the fuel housings. The lift pump fills them during the prime cycle, and pouring unfiltered diesel in from a jug can introduce water and contaminants directly into the clean side of the system. Prime with the lift pump and let it do the job.

How do I know my truck has the 68RFE transmission?

Check for a transmission dipstick on the passenger side of the engine bay. The 68RFE has one; the Aisin AS69RC is serviced through a case-side plug and has no engine-bay dipstick. Your VIN can also confirm it through a dealer parts lookup.

Is the "Air Filter" in this kit the engine air filter?

No. The filter in the box is the cabin air filter (68548579AA), the carbon HVAC element behind the glovebox. The engine air filter is 53034051AB - a separate part with a 30,000-mile interval - and is not included in this set.

Why does the cabin filter matter on a diesel?

Standard paper cabin filters capture particles but pass gaseous odors. Diesel exhaust, crankcase fumes, and DPF regen smell are gases, so only an activated carbon layer adsorbs them. It is the cheapest filter in the set and the only one that changes what you smell inside the cab.

What happens if the fuel filter is not primed correctly?

Air in the high-pressure fuel system causes hard starting, rough running, and in the worst case damage to the common-rail pump. The lift pump prime cycle exists precisely to purge that air. Always cycle the pump until the tone steadies before starting the engine.

Are these filters compatible with a tuned or deleted truck?

The kit is a maintenance set for the factory fuel system, so it fits as long as the truck retains the 2025-2026 filter housings. Where emissions equipment has been removed, that is an off-road and competition modification outside factory configuration, and owners should confirm their own setup before ordering.

Get the Right Filters, in One Box

If your 2025-2026 Ram has been running on whatever filter happened to be on the shelf, this kit closes the gap in one order: the dual-stage fuel cartridges with the water separator and NanoNet layer intact, the top-load oil cartridge matched to the new housing, the 68RFE sump filter, and the carbon cabin filter. All four service positions — five elements in total — with the correct part numbers, fresh O-rings, and a job that never requires you to lie down under the truck.

Get the 2025-2026 Ram 6.7L Filter Maintenance Kit

Want to confirm fitment against what other owners are running? A few threads worth reading:

• 2025-2026 6.7L Ram Primary & Secondary Fuel Filter - Replaces 68677800AA

• 2025-2026 6.7L Ram Cummins Engine Oil Filter - Replaces 68677810AA

• 2019-2026 6.7L Ram Cabin Air Filter - Replaces 68548579AA

• 2007.5-2026 6.7L Ram Transmission Filter - Replaces 5013470AE

Legal Disclaimer

This guide is for general informational purposes only and is not a substitute for your vehicle's factory service manual or the advice of a qualified diesel technician. Always verify the correct part numbers for your specific model year, VIN, transmission, and configuration before purchasing or installing filters. Installation of any aftermarket or replacement part is performed at your own risk; the author and retailer assume no liability for damage, injury, or loss arising from the use of this information or the products referenced. Filter change intervals are manufacturer recommendations and should be adjusted for your driving conditions, towing load, and fuel quality. Emissions-related modifications are subject to federal and state law and are for off-road or competition use only where permitted.