Product Description
Interstate-McBee M-3929028 Camshaft Gear – Cummins B/ISB 3.9L & 5.9L
Heavy-duty 72-tooth steel camshaft gear engineered to OEM dimensions for Cummins B-Series engines. A high-value replacement for worn or damaged timing gears on 1989–2000 Dodge Ram 2500/3500 5.9L applications and many 3.9L 4BT and industrial B-series engines. Built for precise valve timing, long service life, and straightforward installation.
- OEM-equivalent fit: Direct replacement for Cummins 3929028 (see cross-refs below).
- Durable construction: Precision-cut steel gear for stable timing and reduced wear.
- Value vs. OEM: Comparable performance at a fraction of genuine OEM pricing.
- Quality you can trust: From Interstate-McBee, a leading name in heavy-duty diesel parts.
Specifications
| Part Number | M-3929028 (Interstate-McBee) |
|---|---|
| OEM Reference | 3929028 (Cummins) |
| Additional Cross-References | 3912884, 3929030, 3907431, 3902235 |
| Tooth Count | 72 |
| Material | Steel |
| Position | Camshaft gear (timing drive) |
What’s Included
- (1) Camshaft gear, 72-tooth steel
Vehicle Fitment
Verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins
- 1989–1993 12-Valve 6BT
- 1994–1998 12-Valve 6BT (P-pump)
- 1998.5–2000 24-Valve ISB
- Industrial/Commercial: Cummins 4BT 3.9L and other B/ISB/QSB series applications (varies by ESN).
Install Notes
- Lock and mark timing before disassembly; align timing marks on reassembly.
- Clean and inspect mating surfaces; replace related seals as needed.
- Follow the Cummins service manual for torque values and procedures.
Warranty
Interstate-McBee new engine parts carry manufacturer warranty coverage. Valve-train categories may have different terms. Refer to manufacturer policy or contact us to confirm coverage for this cam gear.
Cross-Reference & Compatibility
Fits select Cummins B / ISB / QSB series engines. Cross-refs: 3929028, 3912884, 3929030, 3907431, 3902235.
Why Buy From CPP Diesel
- Curated B-series inventory with tech-backed fitment support
- Fast shipping and hassle-free returns
- Real diesel experts—call or message for ESN-verified compatibility
FAQ
Will this gear fit both 12-valve (6BT) and 24-valve (ISB) 5.9L engines?Yes—this camshaft gear is listed for 1989–2000 Dodge Ram 5.9L B-series applications, which include 12-valve (1989–1998) and early 24-valve ISB (1998.5–2000). Always verify by ESN for edge-case builds.
Does it work on 3.9L 4BT engines?
It is commonly used on 4BT (3.9L) B-series engines in various industrial and commercial platforms. Confirm by ESN.
How does this compare to a genuine Cummins gear?
Interstate-McBee builds to OEM-equivalent specs for form, fit, and function at significant cost savings versus genuine OEM. If you need an OEM-boxed part, a Cummins 3929028 gear is available separately.
What is the tooth count and material?
72 teeth; precision-machined steel.
Any special torque specs?
Use the Cummins service manual for model-specific torque values and procedures. We recommend new fasteners where specified.
Product Videos
Custom Field
YEAR 1989-2000
MAKE DODGE
ENGINE 5.9L
