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.

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.