SSP Max Effort HP90 (Hellcat & Redeye)

Sipple Speed and Performance Max Effort HP90 Transmission for Hellcats & Redeyes

We only offer one level of transmission the “Max Effort”. These are the race proven, fully built transmissions. Billet E Drums, Suncoast clutches all assembled to SSP’s precise specifications.

We don’t just throw a bunch of clutches in and hope for the best. There is a reason Sipple’s Max Effort Transmissions lead the lists online, and the winner’s circle at the track. 


MAX EFFORT HP90 Build Service
All tolerances and specs set to MAX EFFORT standards.

  • Set clutch & hard part clearances to MAX EFFORT specs
  • Installed billet E Drum
  • Bench test unit
  • Recalibrateibrate valve body to MAX EFFORT specs
  • Trans filled with fluid for plug and play


  • Billet E-drum
  • Extra capacity performance frictions/steels
    • (A,C,E,D)
  • Upgraded stator bushing
  • Upgraded rear bearing
  • New seals & gaskets
  • New pan filter
  • New pump & chain
  • Valve body recalibration
  • Build new separator plate & valve body
  • New pump bolts
  • Proprietary modifications to input/output shafts
  • New output shaft nut


  • 2015-2023 Hellcat Challenger
  • 2015-2023 Hellcat Charger
  • 2018 Demon


  • 2015-17
  • 2018-23
  • TCMS different 1st gen/2nd gen


Shipping via Freight

Our transmissions and transfer cases are shipped via freight.

You will not be charged for shipping at checkout. We will contact you when your order is ready to ship with the best freight rate for your shipping timeframe.

Orders will not ship until payment for freight is received.

We do not ship internationally. International shipping is the responsibility of the customer.

For more information on SSP freight shipping policy, please see our knowledge base article: SSP’s Freight Shipping Policy.