Drivetrain · Buyer's Guide
Differentials
The differential splits power between the left and right rear wheels. The stock open diff sends power to the wheel with less grip — bad for traction. A limited-slip differential (LSD) ensures both wheels get power. Gear ratio changes (ring and pinion) alter how the engine's power is multiplied before reaching the wheels.
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All Differentials (4)
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10. DRIVETRAIN
Clutch Kits (Manual Only)
- When needed: Build exceeds ~450–500 ft-lbs torque.
- South Bend Stage 2: Great street/strip balance. ~$650–$900.
- McLeod RST Twin Disc: For high-HP builds. ~$1,500–$2,200.
- Stock clutch: Handles stock power fine but will slip under boosted or cam'd builds.
Driveshafts
- Stock driveshaft: Rated to approximately 600 HP before failure risk.
- Aluminum or carbon fiber one-piece driveshaft reduces rotational mass (improved acceleration).
- DSS Performance: Popular for Challenger one-piece aluminum shafts.
Differentials
- Factory rear differential handles most street builds.
- Limited-slip differential (LSD) upgrades significantly improve traction and launch consistency.
- Moser Engineering, Eaton TrueTrac: Popular LSD options.
Torque Converters (Automatic Only)
- Stock converter slips at high power under WOT.
- Circle D Specialties: Top-rated for the TorqueFlite 8HP70/90 automatic.
- Stall speed matched to cam profile or supercharger power band.