Product Description
Cummins 4955522 — Lower Engine Gasket Set (ISB 6.7L, Rear Gear Train)
MPN: 4955522 | Also Known As: lower gasket kit, bottom-end gasket set | Platform: ISB 6.7L (HPCR, CM2150/CM2250 RGT)
Why This Part
- ✓ Complete OE lower-end kit for bottom-end reassembly.
- ✓ Direct-fit for 2011–2012 Ram 6.7L ISB (rear gear train).
- ✓ Factory-correct materials to seal oil/coolant interfaces.
- ✓ Helps prevent leaks and pressure loss after service.
Kit Contents (Highlights)
- Oil pan gaskets: 3959797, 4934344
- Rear main seal service kit: 3934486 (includes tools 3904325, 3909409)
- Oil seals: 4890832, 5259499
- O-rings: 3929457, 3946188
- Gaskets: 3974127 (filter head), 2830559 (oil cooler core), 3949562 (flange), 4898301 (oil suction conn.)
- Sealing washers: 3287561 (M20), 3902425 (M22), 3920773 (M18)
Exact contents per OE listing; see product images/details for full breakdown.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2011–2012 | Ram 6.7L ISB (HPCR, CM2250 Rear Gear Train) | Ram 2500/3500 |
Industrial/Off-Highway: ISB/QSB 6.7 (CM2150/CM2250 RGT) and EPA07/EPA10 variants—always confirm by ESN.
Often Paired With
- Upper Gasket Set: Cummins 4955523 (’11–’12 6.7L)
- Oil Cooler & Gaskets: 3975818 cooler with 3974127 & 2830559 seals
- Filter Head / Housing: Cummins 5289557
- Fresh oil & filter after reassembly; brake-clean & lint-free towels for prep
What’s In The Box
- (1) Genuine Cummins Lower Engine Gasket Set (4955522)
- See “Kit Contents” for included seals, gaskets, and washers.
Install Tips
- Thoroughly clean mating surfaces; avoid scratching aluminum sealing faces.
- Use torque sequence/spec from Cummins service manual; verify oil pan rail flatness.
- Prime oil system and check for leaks after first heat cycle; re-torque where required.
FAQ
WILL THIS FIT MY 2011–2012 6.7L CUMMINS RAM?Yes—4955522 is the OE lower engine gasket kit for most 2011–2012 6.7L ISB (CM2250, rear gear train). Confirm by VIN/ESN.
WHAT ENGINES/ECUS DOES THIS KIT COVER?Coverage aligns with HPCR ISB 6.7 platforms noted as CM2150 (2007 HPCR RGT) and CM2250 (2010 HPCR RGT) families; always check ESN for exact kit.
WHAT PARTS ARE INCLUDED?Oil pan gaskets, rear main seal service kit + tools, oil/cooler/filter head gaskets, sealing washers, and multiple O-rings. See “Kit Contents.”
IS THIS A GENUINE CUMMINS KIT?Yes—OE Cummins 4955522 with factory materials for proper sealing and durability.
DO I ALSO NEED THE UPPER GASKET SET?If the head is off or you’re doing a full refresh, pair with Upper Gasket Set 4955523 for ’11–’12 6.7L.
