Aftermarket Flywheel Housings for Diesel Trucks | AKMI
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Flywheel Housings

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AKMI carries aftermarket flywheel housings for heavy-duty Aftermarket Cummins, Aftermarket Caterpillar, Aftermarket Detroit, Aftermarket Volvo, Aftermarket Mack, Aftermarket Paccar and Aftermarket Navistar diesel engines. Find your engine in the table below, open the part, and call 1 800 247 7669 for pricing and availability.

Aftermarket flywheel housings by engine

EngineAKMI partNotes
Aftermarket Cummins
6.7L ISB / QSBAK-4944348, AK-3973061AK-4944348 also fits the Paccar PX7 (EPA 2010 to 2020)
B Series, 4B, 6B, ISBAK-3931716, AK-3975179, AK-3937426Aluminum SAE #2, cast iron SAE #2, or cast iron SAE #3
C Series, ISC, ISL (8.3L)AK-3906766, AK-3926207, AK-3975561Cast iron. AK-3906766 is SAE #1, AK-3926207 is SAE #2
ISXAK-3680063, AK-3680373Aluminum SAE #1 housing and its gasket, the AK-3680373
L10, M11, ISMAK-3882590Aluminum, SAE #1
NT855, Big Cam, N14AK-3036011, AK-AR11793, AK-3002067Aluminum. AK-3036011 and AK-AR11793 are SAE #1, AK-3002067 is SAE #2
Aftermarket Caterpillar
3406EAK-1302802, AK-1302800AK-1302802 for Kenworth and Peterbilt, AK-1302800 for Freightliner
C12AK-1481973Aluminum, 12 mm mounting holes
C13AK-2173091Aluminum, 14 mm mounting holes
C15AK-1694153Aluminum SAE #1, for Kenworth, Peterbilt and Western Star
Aftermarket Detroit
Series 60AK-23505073, AK-23522643Aluminum SAE #1. AK-23505073 has 12 mm mounting holes, AK-23522643 has 14 mm
Aftermarket Volvo and Aftermarket Mack
Volvo D13 / Mack MP8AK-21063855SAE #1, manual transmission, EPA10 2010 to 2017
Volvo D11 / Mack MP7AK-20955323
Mack E7 / E-TechAK-634GC5337MAluminum, 6 bolt side pads
Mack with Fuller transmissionAK-A4348Cast iron clutch housing
Aftermarket Paccar
MX13AK-1821123SAE #1
Aftermarket Navistar
DT466E, DT530AK-1820338C2Cast iron SAE #2, starter on the driver side

How to choose the right flywheel housing

Start with the engine model, then check these details on the old housing or in the parts book:

  • Housing size. Most truck housings are SAE #1 or SAE #2, and some smaller engines use SAE #3. The size has to match the transmission or clutch housing it bolts to.
  • Starter position. Each housing puts the starter in a set spot, given as a clock position and side, for example driver side 9 o’clock. It has to match the truck.
  • Material. Most of our housings are aluminum, and some Cummins B, C and ISC/ISL housings come in cast iron.
  • Mounting holes and truck make. Some engines have two versions, like the Detroit Series 60 with 12 mm or 14 mm holes, or the CAT 3406E for Kenworth and Peterbilt or for Freightliner.

If you have the number cast on the old housing or on the work order, call us with it and we’ll match it to the right part.

What a flywheel housing does

The flywheel housing, also called a bell housing, bolts to the back of the engine block and covers the flywheel mounted on the crankshaft. The starter mounts to the housing and engages the flywheel ring gear, and the transmission or clutch housing bolts to its back face. Many housings also have side pads for the rear engine mounts, so the housing helps keep the engine and transmission aligned and secured to the frame. A cracked housing or worn mounting holes can throw off that alignment and cause starter problems.

Common questions

Is a flywheel housing the same as a bell housing?

Many mechanics use both names for the same part, the housing between the engine and the transmission that covers the flywheel.

Do you carry the gasket for the Cummins ISX flywheel housing?

Yes. The AK-3680373 gasket goes with the AK-3680063 ISX flywheel housing.

What if my part number isn’t listed?

Call 1 800 247 7669 with the number you have and the engine model, and we’ll check if one of our housings replaces it.

Also replacing the flywheel? See our flywheels and flywheel ring gears.