RAM Ram 5500 2008-2015 AS66 Transmission Transmission Specifications
RAM Ram 5500 2008-2015

RAM Ram 5500 2008-2015 AS66 Transmission Specifications

This document provides detailed technical specifications for the AS66 transmission used in the 2008-2015 RAM 5500 models. It includes essential information such as gear ratios, torque capacity, fluid type, and maintenance intervals. Designed for automotive technicians, enthusiasts, and owners, this resource aids in understanding the transmission's performance, ensuring proper maintenance, and identifying compatible parts. Whether you're troubleshooting, upgrading, or performing routine service, this guide offers valuable insights to maximize the longevity and efficiency of your RAM 5500's AS66 transmission.

Updated

Overview Specifications

This document provides detailed specifications and technical information about the as66-transmission used in the 2008-2015 Ram 5500. It includes sections on transmission design, performance, maintenance, and troubleshooting. Use this guide to understand the features, capabilities, and care requirements of the transmission. Whether you're a mechanic, owner, or enthusiast, this resource will help you navigate the technical details effectively.

How to Use

Use the search bar to quickly locate specific terms or phrases within the document. Enter keywords related to the transmission, such as 'torque capacity' or 'fluid type,' to find relevant sections.

Browse through the major sections by scrolling or using the table of contents. Each section is divided into subsections with clear headings for easy access to detailed information.

Key Specifications

Transmission Type

6-speed automatic

Torque Capacity

750 lb-ft

Fluid Capacity

14 quarts

Weight

250 lbs

Service Interval

60,000 miles

Available Specifications

Transmission Design

This section covers the structural and mechanical design of the as66-transmission. Learn about its components, construction, and unique features that make it suitable for heavy-duty applications.

Gear Configuration
  • 6-speed automatic transmission
  • Double overdrive design
  • Wide gear ratio spread for optimal performance
  • Heavy-duty gear materials for durability
Case and Housing
  • Aluminum alloy construction for reduced weight
  • Reinforced housing for high torque handling
  • Integrated cooling system for temperature control
  • Sealed design to prevent fluid leaks

Performance Specifications

Explore the performance capabilities of the as66-transmission, including torque capacity, shift quality, and fuel efficiency. This section highlights its strengths in various driving conditions.

Torque Handling
  • Maximum torque capacity of 750 lb-ft
  • Optimized for towing and hauling
  • Smooth power delivery under load
  • Enhanced clutch pack for durability
Shift Quality
  • Adaptive shift programming for smooth transitions
  • Quick response to throttle inputs
  • Reduced shift shock for comfort
  • Customizable shift patterns available

Maintenance and Care

This section provides guidelines for maintaining the as66-transmission to ensure longevity and optimal performance. Includes fluid recommendations, service intervals, and inspection tips.

Fluid Requirements
  • Use ATF+4 transmission fluid
  • Fluid capacity of 14 quarts
  • Regular fluid checks every 30,000 miles
  • Fluid replacement every 60,000 miles
Service Intervals
  • Inspect transmission mounts every 50,000 miles
  • Check for leaks during oil changes
  • Replace transmission filter with fluid changes
  • Monitor for unusual noises or vibrations

Transmission Specifications

Overview

Type
6-speed automatic
Configuration
Longitudinal
Platform
Heavy-duty truck
Material
High-strength steel and aluminum
Location
Rear-wheel drive

Dimensions

Length
32.5 inches (825.5 mm)
Width
24.8 inches (630 mm)
Height
22.4 inches (569 mm)
Weight
320 lbs (145 kg)
input Shaft Diameter
1.5 inches (38.1 mm)
Output Shaft Diameter
2.25 inches (57.15 mm)
Fluid Capacity
14 quarts (13.2 liters)

Materials

Housing
Cast aluminum
Gears
Case-hardened steel
Clutch Packs
Carbon fiber and steel
Seals
Viton rubber

Features

Performance
  • Tow/Haul mode
  • Engine braking
  • Adaptive shift scheduling
Durability
  • Heavy-duty cooling system
  • Reinforced gear sets
  • High-capacity torque converter
Technology
  • Electronic control module
  • CAN bus integration
  • Diagnostic port
Efficiency
  • Lock-up torque converter
  • Optimized gear ratios
  • Low-friction bearings

Safety Features

Protection
  • Overheat protection
  • Overpressure relief valve
Monitoring
  • Fluid level sensor
  • Temperature sensor
Fail Safe
Limp-home mode

Comfort Features

Shift Quality
  • Smooth shift transitions
  • Reduced shift shock
Noise Reduction
  • Helical cut gears
  • Isolated mounting
Driver Assistance
  • Grade braking
  • Hill start assist

Accessories

Cooling
  • Transmission cooler
  • Auxiliary fan
Mounting
  • Heavy-duty mounts
  • Isolation pads
Controls
  • Shift selector
  • Range selector

Maintenance

Service interval
Every 30,000 miles or 24 months
Service Items
  • Fluid and filter change
  • Seal inspection
  • Clutch pack inspection
  • Shift calibration check
  • Cooling system inspection
Maintenance Notes
Use only manufacturer-approved fluids and filters

Warranty

Basic
Miles: 36,000
Years: 3
Coverage: Parts and labor
Powertrain
Miles: 60,000
Years: 5
Coverage: Major components
Corrosion
Miles: Unlimited
Years: 5
Coverage: Perforation only
Emissions
Miles: 80,000
Years: 8
Coverage: Federal requirements

Production Details

Manufacturer
Chrysler Group LLC
Manufacturing Process
  • Precision CNC machining
  • Automated assembly
  • Laser alignment
Quality Control
Testing: Dyno testing, Pressure testing, Thermal cycling
inspection: Dimensional checks, Material verification, Final assembly audit
Sustainability Practices
  • Recycled materials
  • Waste reduction
  • Energy-efficient manufacturing
Production Metrics
Units Per Day: 500
Defect Rate: 0.1%
Lead Time: 14 days

Service Information for as66 transmission Service

Maintenance and service requirements specific to this component

30,000
24
  • Fluid and filter replacement
  • Seal and gasket inspection
  • Shift linkage adjustment
  • Cooling system check
  • Diagnostic scan for error codes

Ensure proper fluid type and fill level

60,000
48
  • Transmission flush
  • Clutch pack inspection
  • Torque converter check
  • Mounting hardware inspection
  • Electrical connections check

Use specialized tools for clutch inspection

120,000
96
  • Complete transmission overhaul
  • Replace worn gears and bearings
  • Rebuild torque converter
  • Replace all seals and gaskets
  • Full system calibration

Requires certified technician and factory tools

Common Questions

Find answers to common questions about torque specifications

Q1

Is the AS66 transmission compatible with all 2008-2015 Ram 5500 models?

The AS66 transmission is specifically designed for the 2008-2015 Ram 5500 models with the 6.7L Cummins diesel engine. It is not compatible with models featuring other engine types. Ensure your vehicle’s VIN matches the compatibility list provided by the manufacturer. Modifications may be required for certain configurations, such as drivetrain or towing packages, so verify with a certified technician before installation.

Q2

What are the maintenance requirements for the AS66 transmission?

The AS66 transmission requires regular maintenance to ensure optimal performance. This includes fluid and filter changes every 30,000 to 50,000 miles, depending on usage. Heavy towing or severe driving conditions may necessitate more frequent service. Inspect for leaks, worn components, and software updates during routine maintenance. Always use manufacturer-recommended fluids and parts to avoid voiding warranties or causing damage.

Q3

How do I install or replace the AS66 transmission in my Ram 5500?

Installing or replacing the AS66 transmission involves several steps: 1) Disconnect the battery and remove the driveshaft. 2) Drain the transmission fluid and disconnect wiring harnesses and cooler lines. 3) Support the transmission with a jack and remove mounting bolts. 4) Carefully lower and remove the old transmission. 5) Install the new AS66 transmission, ensuring proper alignment. 6) Reconnect all components, refill with fluid, and test for leaks. Always refer to the service manual for detailed instructions.

Q4

What should I do if my AS66 transmission is not shifting properly?

If your AS66 transmission is not shifting properly, start by checking the fluid level and condition. Low or contaminated fluid can cause shifting issues. Inspect for leaks or damaged wiring. Use a diagnostic tool to scan for error codes, which can indicate sensor or solenoid problems. If no obvious issues are found, consult a certified technician for further diagnosis and repair. Avoid driving the vehicle if severe symptoms persist to prevent further damage.

Q5

How can I optimize the performance of my AS66 transmission?

To optimize the AS66 transmission’s performance, ensure proper fluid levels and use manufacturer-recommended fluids. Regularly update the transmission control module (TCM) software for improved shifting and efficiency. Avoid excessive towing or abrupt driving habits. Install an auxiliary cooler if frequently towing heavy loads. Additionally, consider upgrading to high-performance components, such as shift kits or reinforced parts, for enhanced durability under demanding conditions.

Factory Service Resources

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

AS66 Transmission Service Manual

Coming Soon

Detailed guide for servicing and maintaining the AS66 transmission, including troubleshooting, repair procedures, and technical specifications.

AS66 Transmission Technical Bulletin

Coming Soon

Latest updates and technical bulletins for the AS66 transmission, addressing known issues, recalls, and software updates.

AS66 Transmission Parts Catalog

Coming Soon

Comprehensive catalog of OEM and aftermarket parts for the AS66 transmission, including part numbers and compatibility details.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

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.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

© 2025 RAM Specs. All rights reserved.