Kia Sorento 2021-present A8F Transmission Transmission Specifications
Kia Sorento 2021-present

Kia Sorento 2021-present A8F Transmission Specifications

This comprehensive guide provides detailed technical specifications for the A8F 8-speed automatic transmission used in 2021-Present Kia Sorento models. It covers essential transmission data including gear ratios, torque capacity, fluid requirements, and maintenance intervals. The document serves as a valuable resource for technicians, owners, and enthusiasts seeking to understand the transmission's capabilities, performance characteristics, and service requirements. It includes detailed breakdowns of shift patterns, electronic control systems, and diagnostic parameters. The guide also provides compatibility information for various Sorento trim levels and engine configurations. Whether you're performing routine maintenance, troubleshooting transmission issues, or exploring upgrade options, this specification document offers the technical details needed to make informed decisions and ensure proper transmission operation.

Updated

Overview Specifications

This document provides detailed specifications and technical information about the a8f-transmission system used in the 2021-Present Kia Sorento. It is designed to assist technicians, engineers, and enthusiasts in understanding the transmission's features, maintenance requirements, and performance characteristics. Use this guide to navigate through the sections, search for specific details, and reference key specifications quickly.

How to Use

Use the search functionality to find specific terms or phrases within the document. Enter keywords related to the a8f-transmission, such as 'gear ratios' or 'fluid capacity,' to locate relevant information instantly.

Navigate through the document using the table of contents or by scrolling through sections. Each major section is labeled clearly, and subsections provide detailed breakdowns of the a8f-transmission's components and features.

Key Specifications

Transmission Type

8-speed automatic

Torque Capacity

400 Nm

Fluid Capacity

7.5 liters

Shift Time

<200 ms

Service Interval

60,000 miles

Available Specifications

Transmission Design

This section covers the design and architecture of the a8f-transmission, including its construction, materials, and layout. Learn about the transmission's innovative features and how they contribute to the Kia Sorento's performance.

Gear Configuration
  • 8-speed automatic transmission
  • Front-wheel drive and all-wheel drive compatibility
  • Optimized gear ratios for fuel efficiency
  • Seamless shifting with minimal lag
  • Compact design for improved packaging
  • Lightweight construction for enhanced performance
Materials and Durability
  • High-strength aluminum casing
  • Precision-engineered gears for longevity
  • Advanced heat treatment for durability
  • Corrosion-resistant components
  • Sealed design to prevent contamination
  • Tested for extreme driving conditions

Performance Specifications

Explore the performance metrics of the a8f-transmission, including torque capacity, shift response times, and efficiency. This section provides insights into how the transmission enhances the driving experience.

Torque and Power Handling
  • Maximum torque capacity of 400 Nm
  • Supports engines up to 3.5L V6
  • Optimized for both city and highway driving
  • Enhanced power delivery for towing
  • Smooth acceleration under heavy loads
  • Adaptive shift logic for varying terrains
Shift Response and Efficiency
  • Shift times under 200 milliseconds
  • Adaptive shift mapping for driver behavior
  • Improved fuel economy with eco-mode
  • Reduced friction for better efficiency
  • Quiet operation at all speeds
  • Enhanced responsiveness in sport mode

Maintenance and Service

This section outlines the maintenance requirements and service intervals for the a8f-transmission. Learn about fluid specifications, inspection procedures, and troubleshooting tips.

Fluid Requirements
  • Recommended transmission fluid: SP-IV
  • Fluid capacity: 7.5 liters
  • Regular fluid checks every 30,000 miles
  • Fluid replacement interval: 60,000 miles
  • Use of synthetic fluid for extended life
  • Proper disposal of used transmission fluid
Inspection and Troubleshooting
  • Regular inspection of seals and gaskets
  • Diagnostic scan for error codes
  • Check for leaks and unusual noises
  • Monitor shift quality and responsiveness
  • Address software updates promptly
  • Consult service manual for advanced issues

Transmission Specifications

Overview

Type
8-speed automatic
Configuration
Front-wheel drive (FWD) / All-wheel drive (AWD)
Platform
N3
Material
Aluminum alloy casing
Location
Mounted longitudinally

Dimensions

Length
22.5 inches (571.5 mm)
Width
15.7 inches (398.8 mm)
Height
12.2 inches (309.9 mm)
Weight
187 lbs (84.8 kg)
input Shaft Diameter
1.2 inches (30.5 mm)
Output Shaft Diameter
1.4 inches (35.6 mm)
Fluid Capacity
7.4 quarts (7 liters)

Materials

Casing
Aluminum alloy
Gears
High-strength steel
Clutch Packs
Carbon composite
Seals
Synthetic rubber
Sensors
Stainless steel and plastic

Features

Performance
  • Adaptive shift control
  • Sport mode with paddle shifters
  • Eco mode for fuel efficiency
  • Quick-shift technology
Durability
  • Reinforced gear teeth
  • High-temperature fluid resistance
  • Corrosion-resistant casing
Technology
  • Electronic shift-by-wire system
  • Integrated transmission control module
  • Real-time diagnostics
Efficiency
  • Low-friction bearings
  • Optimized gear ratios
  • Reduced internal drag
Safety
  • Fail-safe limp mode
  • Overheat protection
  • Torque reduction during wheel slip

Safety Features

Mechanical
  • Reinforced torque converter
  • High-strength clutch plates
Electronic
  • Transmission temperature monitoring
  • Shift lock override
Emergency
  • Neutral safety switch
  • Park lock system

Comfort Features

Smoothness
  • Precision-engineered gears
  • Dual-mass flywheel
Noise Reduction
  • Sound-dampening casing
  • Low-vibration design
Convenience
  • Auto-hold function
  • Hill-start assist
Climate
  • Thermal management system
  • Fluid cooling system

Accessories

Upgrades
  • Performance transmission fluid
  • Heavy-duty cooler kit
  • Shift knob upgrades
Tools
  • Transmission jack adapter
  • Fluid exchange pump
  • Diagnostic scanner
Maintenance
  • Filter kit
  • Gasket set
  • Sealant

Maintenance

Service interval
Every 60,000 miles or 48 months
Service Items
  • Transmission fluid replacement
  • Filter replacement
  • Seal inspection
  • Sensor diagnostics
  • Shift linkage adjustment
Notes
Use only manufacturer-approved fluids and parts

Warranty

Basic
Miles: 60,000
Years: 5
Coverage: Parts and labor
Powertrain
Miles: 100,000
Years: 10
Coverage: Transmission components
Corrosion
Miles: Unlimited
Years: 7
Coverage: Casing and seals
Roadside Assistance
Miles: Unlimited
Years: 5
Coverage: Towing and emergency services

Production Details

Manufacturer
Kia Motors
Manufacturing Process
  • Precision CNC machining
  • Automated assembly
  • Laser alignment
Quality Control
Testing: Durability testing, Thermal cycling, Noise and vibration analysis
Standards: ISO 9001, ISO 14001
Sustainability
  • Recycled materials in casing
  • Low-emission manufacturing
  • Energy-efficient production
Production Metrics
Units Per Year: 500,000
Defect Rate: 0.01%
Lead Time: 4 weeks

Service Information for a8f transmission Service

Maintenance and service requirements specific to this component

30,000
24
  • Inspect transmission fluid level
  • Check for leaks
  • Test shift responsiveness
  • Diagnose electronic controls

Ensure fluid is at optimal level and free of contaminants

60,000
48
  • Replace transmission fluid
  • Replace filter
  • Inspect clutch packs
  • Test torque converter

Use only manufacturer-approved fluids and parts

120,000
96
  • Overhaul transmission
  • Replace worn gears
  • Inspect and replace seals
  • Test all electronic sensors

Major service requires specialized tools and expertise

Common Questions

Find answers to common questions about torque specifications

Q1

Is the a8f transmission compatible with all 2021-Present Kia Sorento models?

The a8f transmission is specifically designed for the 2021-Present Kia Sorento models equipped with the 2.5L turbocharged engine. It is not compatible with hybrid or plug-in hybrid variants. Always verify your vehicle's engine type and model year before purchasing or installing the a8f transmission to ensure compatibility.

Q2

What are the maintenance requirements for the a8f transmission?

The a8f transmission requires regular maintenance to ensure optimal performance. This includes checking and replacing the transmission fluid every 60,000 miles, inspecting for leaks, and ensuring the transmission control module software is up to date. Regular servicing by a certified technician is recommended to maintain warranty coverage and prevent potential issues.

Q3

How do I install or replace the a8f transmission in my Kia Sorento?

Installing or replacing the a8f transmission requires professional expertise. Begin by safely lifting the vehicle and removing the undercarriage components. Disconnect the transmission mounts, wiring harnesses, and fluid lines. Carefully lower the old transmission and install the new one, ensuring all connections are secure. Refill with the recommended transmission fluid and test the system before driving.

Q4

What should I do if my a8f transmission is not shifting smoothly?

If your a8f transmission is not shifting smoothly, first check the transmission fluid level and condition. Low or contaminated fluid can cause shifting issues. Inspect for error codes using a diagnostic tool and ensure the transmission control module software is updated. If problems persist, consult a certified technician for further diagnosis and repair.

Q5

How can I optimize the performance of my a8f transmission?

To optimize the performance of your a8f transmission, use the recommended transmission fluid and ensure it is changed at regular intervals. Avoid aggressive driving and excessive towing to reduce wear. Keep the transmission control module software updated and perform regular inspections to address any issues early. These steps will help maintain smooth operation and extend the transmission's lifespan.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

2021-Present Kia Sorento a8f Transmission Service Manual

Coming Soon

This manual provides detailed instructions for servicing and maintaining the a8f transmission, including fluid specifications, torque settings, and diagnostic procedures.

Technical Service Bulletin for a8f Transmission Software Update

Coming Soon

This bulletin outlines the latest software updates for the a8f transmission control module, addressing performance improvements and bug fixes.

Kia Sorento a8f Transmission Parts Catalog

Coming Soon

This catalog lists all available parts and accessories for the a8f transmission, including part numbers, descriptions, and compatibility information.

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
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About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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