Product Description
Interstate-McBee M-3926126 Rear Main Crankshaft Seal w/ Wear Sleeve – 89–18 Cummins 5.9L / 6.7L
Stop rear main leaks the right way. The Interstate-McBee M-3926126 kit includes a rear crankshaft seal and wear (repair) sleeve for a precise, OEM-style fit on 1989–2018 Cummins 5.9L & 6.7L applications. Built from durable materials to meet or exceed factory specs, this aftermarket kit restores sealing on worn crank surfaces and helps prevent repeat leaks.
- Complete solution: Rear main oil seal + wear/repair sleeve for grooved crank surfaces.
- OEM-style fit & performance: Matches Cummins ref. 3926126.
- Durable construction: Materials and dimensions engineered for long service life.
- Aftermarket value: Interstate-McBee quality at a budget-friendly price point.
What’s Included
- (1) Rear crankshaft oil seal
- (1) Wear/repair sleeve
Specifications
| Manufacturer | Interstate-McBee |
|---|---|
| Part Number | M-3926126 |
| OEM Cross-Reference | Cummins 3926126 |
| Kit Contents | Rear main seal + wear sleeve |
| Position | Rear crankshaft (flywheel end) |
Vehicle & Engine Fitment
Always verify with your engine serial number (ESN) for exact compatibility.
- Dodge Ram 2500/3500 – 5.9L/6.7L Cummins
- 1989–1998 5.9L 12-Valve (6BT)
- 1998.5–2002 5.9L 24-Valve (ISB)
- 2003–2007 5.9L Common-Rail (ISB)
- 2007.5–2018 6.7L Cummins (ISB)
- Additional Cummins platforms (select applications): B/ISB/QSB 5.9, C-Series 8.3L, ISC, ISL, QSC, QSL (verify by ESN).
Install Notes
- Inspect the crank sealing surface. If grooved, install the wear sleeve per instructions.
- Use the correct depth/driver tool; do not cock or over-drive the seal.
- Lightly oil the lip; follow factory torque specs and procedures in the Cummins service manual.
Why Buy From CPP Diesel
- ESN-verified support from real diesel techs
- Fast shipping and easy returns
- Matched parts for the job (seal installers, rear cover gaskets, flywheel bolts)
FAQ
Does this kit include the wear (repair) sleeve?Yes. The M-3926126 kit includes the rear main seal and the wear/repair sleeve.
What years and engines does it fit?
It covers 1989–2018 Dodge Ram 5.9L & 6.7L Cummins, plus select B/ISB/QSB, C-Series 8.3L, ISC, ISL, QSC, and QSL applications. Always confirm by ESN.
When should I use the sleeve?
If the crankshaft has a groove where the seal rides, the sleeve provides a fresh sealing surface to prevent repeat leaks.
Is an installer tool required?
Using the correct installer/depth tool is strongly recommended to ensure the seal sits squarely and at the proper depth.
Torque specs?
Refer to the Cummins service manual for model-specific procedures and torque values.
Product Videos
Custom Field
YEAR 1989-2018
MAKE DODGE
ENGINE 5.9L,6.7L
