Description
Spool Performance Stage 2 DIY Transmission Kit – Dodge 8HP70 & 8HP75
The Spool Stage 2 DIY Transmission Kit transforms Dodge 8HP70/75 transmissions into high-torque, high-RPM powerhouses capable of over 1200 ft-lbs torque and 1200+ WHP. Built for DIY enthusiasts, this kit eliminates stock weak points while delivering superior shift quality, thermal stability, and drivetrain reliability.
Key Benefits
- Holds significantly more torque than stock 8HP units
- Perfect for boosted, nitrous, and high-RPM HEMI builds
- DIY-friendly with pre-clearanced clutch packs
- No machining or specialty tools required
- Maintains excellent drivability under high power
Advanced Billet Hub Engineering
OEM C & E hubs in 8HP transmissions are weak points under high torque. Common failures include spline shearing, cracking, and binding due to steel plates damaging soft aluminum.
Spool Upgrades:
- Billet 7075-T6 Hubs: Aerospace-grade, heat-treated, hard-anodized aluminum
- Optimized Design: Faster oil evacuation, improved clutch contact, reduced rotating mass
- Eliminates weak points while improving high-load performance
FX-RT Frictions + Increased Clutch Counts
- In-house FX-RT friction materials provide higher coefficient and thermal resistance
- Increased clutch counts across A–E packs for extreme torque handling
- Consistent, smooth engagement without harshness
- Works with all high-power HEMI builds
DIY-Friendly Installation
- Pre-clearanced clutch packs ready to install
- Custom pressure & apply plates eliminate setup guesswork
- Extra steel plates included for fine-tuning
- 100% drop-in compatibility with Dodge 8HP70 & 8HP75 transmissions
What’s Included
- 7075 Billet E Hub + E Hub Center Bushing
- 7075 Billet C Hub
- Clutch Packs: A, B, C, D, E (frictions, steels, pressure plates, apply plates)
- Complete Seal Kit (Gaskets + O-rings)
Recommended Fluid
AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF (Blue Cap) – ideal for high-performance 8HP builds requiring superior thermal stability.
Compatible Vehicles
Dodge / RAM / Jeep / Chrysler 8HP70 & 8HP75 Platforms:
Dodge:
- Charger R/T 5.7, Charger Scat Pack / SRT 392 6.4
- Challenger R/T 5.7, Challenger Scat Pack / SRT 392 6.4
- Durango R/T 5.7, Durango SRT / 6.4L
RAM:
- Ram 1500 5.7 (DT, 8HP75), Ram 1500 3.0 EcoDiesel
- Ram 2500 / 3500 6.4 (8HP75-LCV)
Jeep:
- Grand Cherokee 5.7, SRT 6.4, 3.0 EcoDiesel
- Wrangler 392 6.4, Wagoneer / Grand Wagoneer (8HP75 variants)
Chrysler:
- 300C 5.7, 300 SRT 6.4
Note: 'New' merchandise may be returned for exchange or refund within 15 days from the date of shipment. 'New' merchandise must be unused and free from installation or mounting damage. Installation or modification of parts waives your right to returns, refunds, or exchanges.
