PACH602: Chevrolet/GM 4200 Vortec/Atlas to Dodge Ram 8HP70/75/80/90 Automatic Transmission Adapter Kit

Chevrolet/GM 4200 to Dodge Ram 8HP70/75/80/90 Automatic Transmission Adapter Kit

***The 46mm torque converter pilot size found in 2018+  8HP applications are NOT compatible with this kit. 46mm is larger than the 4200-engine pilot and will not allow the torque converter pilot to seat properly with the current adapter plate thickness.***

KIT OVERVIEW

Performance Adapters — Chevrolet/GM 4200 Atlas to Dodge Ram 8HP Transmission

The ZF 8HP series transmissions are among the best options available for transmission swaps today. Pairing a 4200 Atlas engine-based vehicle or engine swapped vehicle — whether for street or track use — can completely transform performance and drivability.

This adapter system allows you to mate a GM 4200 engine to a Dodge V8–platform ZF 8HP transmission, including the 8HP70, 8HP75, 8HP90, and 8HP95 models. These transmissions deliver lightning-fast shifts and are capable of handling substantial power levels, especially when combined with aftermarket transmission control systems.

Technical Overview

• Compatible Engines: GM 4200 Inline 6
  
• Compatible Transmissions: ZF 8HP70 / 8HP75 / 8HP90 / 8HP95 (Dodge/Chrysler V8 applications)
  
• Adapter Plate Material: CNC-machined 6061-T6 billet aluminum for strength and dimensional accuracy
  
• Crankshaft Interface: Includes precision-machined steel flexplate adapter and pilot converter adapter to ensure proper converter engagement and crankshaft alignment
  
• Torque Capacity: Supports power levels exceeding 1000+ HP when used with upgraded 8HP internals and aftermarket control systems
  
• Transmission Control: Compatible with popular standalone controllers such as HTG Tuning GCU, Turbo Lamik, MAXXECU and Sound German Automotive (SGA) systems & More
  
• Starter Compatibility: GM High Torque Mini Starter Bolted into the Adapter plate in factory location area
  
• Input Shaft Alignment: Engineered concentricity within ±0.002” to maintain clutch pack and input shaft longevity

Performance Benefits

• Ultra-fast shifts (as low as 200 milliseconds) with adaptive shift logic
• Reduced parasitic loss compared to traditional automatics
• Eight optimized gear ratios for both drag and road course performance
• Enhanced fuel efficiency at cruising speeds
• Future-proof control options, supporting paddle shifters and sequential operation modes

Applications

Ideal for street performance builds, pro-touring projects, modern resto-mods, and drag or track vehicles where maximum acceleration, shift precision, and reliability are desired.

For additional questions, please Call, Text or Email us anytime at
608-640-2328 or Sales@Performanceadapters.com

Performance Adapters is not responsible for return shipping. Additional return information can be found in our policy pages. If you have any additional questions, please contact us call, text or email.