68412063AA Jeep Grand Cherokee 5.7L 8HP70 Transmission

	
 Summary Paragraph: The remanufactured ZF 8HP70 (Mopar DFD) 8-speed automatic transmission assembly (OE: 68412063AA / R8412063AA / 68218925AB) represents heavy-duty longitudinal drivetrain engineering, delivering rapid gear shifts, seamless torque multiplication, and enhanced fuel economy for high-output SUV platforms. Specifically engineered to integrate with the 5.7L HEMI V8 and 3.0L EcoDiesel V6 engines, this high-capacity gearbox is a reliable, direct-fit replacement for the Jeep Grand Cherokee WK2 (2014-2021) and Dodge Durango (2014-2021), instantly restoring factory-grade towing and driving performance.

 Core Features & Components: 
	

	

		High-Torque 700 Nm Architecture: Built with four planetary gearsets and five multi-plate shift elements (two holding brakes and three rotating clutches) rated to handle up to 700 Nm of input torque for V8 and turbo-diesel applications.
	

	

		Wide-Ratio 8-Speed Gearset: Features a 7.07:1 overall gear ratio spread that delivers strong low-end launch and towing power while maintaining low engine RPMs at highway cruising speeds.
	

	

		Integrated Mechatronics & Torque Converter: Comes complete with an ultrasonically cleaned hydraulic valve body, calibrated solenoids, integrated Transmission Control Module (TCM), and a heavy-duty lock-up torque converter.
	

	

		100% Dynamometer & Pressure Tested: Every remanufactured 8HP70 unit undergoes rigorous hot-run dynamometer testing to verify shift timing, line pressure stability, and leak-free sealing before shipment.
	

		
 Professional Installation & Technical Notes: 
			

			

				Fluid Specification: This unit exclusively requires ZF LifeguardFluid 8 or genuine Mopar 8&9 Speed ATF (68218925AA). Using conventional ATF+4 or non-approved aftermarket fluids will cause severe shift harshness, clutch glazing, and internal overheating.
			

			

				Programming & Coding Mandatory: The internal Mechatronics TCM must be flashed and matched to the vehicle VIN after installation using specialized Chrysler/Jeep diagnostic equipment (such as wiTECH), followed by a Quicklearn clutch adaptation procedure.
			

			

				System Flushing: The vehicle's transmission oil cooler, thermal bypass valve, and external cooler lines must be thoroughly flushed prior to start-up to prevent metallic debris from the previous failed unit from contaminating the new transmission.