Product Description
CUMMINS 3975464 OEM FLEXPLATE (DRIVE PLATE) – RAM 5.9L (1989–2007) AUTOMATIC
Genuine OEM fitment for 5.9 L Cummins automatic applications — designed to meet or exceed factory standards for durability, balance, and performance.
OVERVIEW
This is the official Cummins-manufactured flexplate, part number 3975464 — engineered to mate the crankshaft of your 5.9 L Cummins engine to the torque converter in 47RH / 47RE / 48RE automatic transmissions. It is the direct OEM replacement for earlier part numbers 3908524, 3917607, and 3917784.
It features the correct ring-gear interface for reliable starter engagement, factory-balanced bolt pattern for smooth power transfer, and a robust construction designed for long service life under stock or heavy-duty use.
FITMENT
- Vehicle: Dodge RAM 2500 / 3500 with 5.9 L Cummins (1989–2007)
- Engine: 5.9 L 12-valve (1989–1998) & 5.9 L 24-valve ISB (1998.5–2007)
- Transmission: Automatic only — 47RH, 47RE, or 48RE
- Quantity Required: 1 per engine (sold individually)
FEATURES & BENEFITS
- OE-spec flexplate that ensures perfect fit and function — no need for modification or adaptation.
- Proper ring-gear tooth profile for reliable starter engagement and longevity.
- Factory-balanced design to minimize vibration and ensure smooth power transfer through the torque converter.
- Supports heavy-duty use and real-world demands while maintaining OEM safety and build standards.
INSTALLATION NOTES
Because this is a direct-fit OEM part, installation is straightforward: install 1 per engine behind the 5.9 L Cummins with an automatic transmission. Confirm crank index and torque-converter bolt circle. Use new converter bolts (commonly OE bolt P/N 3908522) or upgraded bolts if planned; retorque in a star pattern per factory spec. Re-check converter-to-flexplate hardware after the initial heat cycle.
CROSS-REFERENCE / RELATED PARTS
Previous/alternate part numbers for this flexplate: 3908524, 3917607, 3917784.
FAQ
WILL THIS FIT MY 1989–2007 5.9 L CUMMINS RAM?
Yes — this is the OEM flexplate designed for almost all 5.9 L Cummins automatic applications from 1989 to 2007. For early 1989-1993 trucks, verify torque-converter clearance and bolt pattern by VIN/ESN.
WHICH TRANSMISSIONS DOES IT WORK WITH?
It is intended for 47RH, 47RE, or 48RE automatic transmissions only. Manual transmission applications require a flywheel, not a flexplate.
SHOULD I REPLACE THE BOLTS WHEN INSTALLING?
Yes — best practice is to use new flexplate and torque-converter bolts to ensure safe installation and avoid loosening under load. OE bolt P/N 3908522 is commonly used; torque as per factory spec.
SPECIFICATIONS FOR CUMMINS 3975464
| Specification | Detail |
|---|---|
| Part Number | 3975464 |
| Also Known As / Previous P/N | 3908524, 3917607, 3917784 |
| Application | Ram 5.9 L Cummins (1989–2007) Automatic |
| Transmission Fitment | 47RH / 47RE / 48RE only |
| Quantity Required | 1 per engine |
| Weight / Shipping Weight | Approx. 9.4 lb (per Cummins site spec) |
| Ring Gear Interface | Correct OEM-spec ring gear for starter engagement |
| Bolt Pattern / Balance | Factory-balanced bolt pattern for smooth power transfer and reduced vibration |
| Box Contents | 1 × Genuine Cummins Flexplate (3975464). Bolts/converter hardware sold separately. |
| Prop 65 | Not applicable |
