BMW 740i 2008-2015

BMW 740i 2008-2015 ZF 8HP Transmission Specifications

Detailed technical specifications for the ZF-8HP automatic transmission system used in the 2008-2015 BMW 740i. This document covers gear ratios, torque capacity, fluid requirements, shift patterns, and diagnostic codes specific to this transmission model.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the zf-8hp-transmission specifications for the 2008-2015 bmw 740I, including key features, measurements, and technical details

How to Use

Use the search function to locate specific zf-8hp-transmission specifications by entering keywords such as 'torque capacity', 'gear ratios', or 'fluid capacity'.

Navigate through the documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Transmission Weight

87 kg (192 lbs)

Torque Capacity

700 Nm (516 lb-ft)

Fluid Capacity

9.5 liters (10 quarts)

Shift Time

200 milliseconds

Gear Ratios

1st: 4.714:1 to 8th: 0.667:1

Available Specifications

Transmission Design and Architecture

Detailed description of the zf-8hp-transmission's design, architecture, and key components.

Transmission Layout

8-speed automatic transmission with planetary gear sets
Compact and lightweight design, weighing approximately 87 kg (192 lbs)
Integrated torque converter with lock-up clutch
Electro-hydraulic control system for precise gear shifts

Gear Ratios

1st gear: 4.714:1
2nd gear: 3.143:1
3rd gear: 2.106:1
4th gear: 1.667:1
5th gear: 1.285:1
6th gear: 1.000:1
7th gear: 0.839:1
8th gear: 0.667:1
Reverse gear: 3.317:1

Note: Gear ratios optimized for performance and fuel efficiency.

Performance Specifications

Technical details about the zf-8hp-transmission's performance capabilities.

Torque Capacity

Maximum torque capacity: 700 Nm (516 lb-ft)
Designed to handle high-performance applications
Suitable for both gasoline and diesel engines

Shift Times

Shift times as low as 200 milliseconds
Adaptive shift strategy for smooth and responsive driving
Supports manual shifting via paddle shifters

Note: Shift times may vary depending on driving conditions.

Maintenance and Fluid Specifications

Information on maintenance requirements and fluid specifications for the zf-8hp-transmission.

Fluid Capacity

Total fluid capacity: 9.5 liters (10 quarts)
Fluid type: ZF Lifeguard 8 transmission fluid
Fluid change interval: 80,000 km (50,000 miles) or as recommended by BMW

Maintenance Requirements

Regular fluid and filter changes required
Sealed transmission design with no dipstick
Diagnostics via BMW ISTA system for error codes and maintenance alerts

Note: Use only ZF-approved fluids to ensure optimal performance.

Integration with BMW 740I

Details on how the zf-8hp-transmission is integrated into the 2008-2015 BMW 740I.

Engine Compatibility

Compatible with the N63 4.4L V8 twin-turbocharged engine
Supports BMW's EfficientDynamics technology
Integrated with xDrive all-wheel-drive system

Driving Modes

Supports Eco Pro, Comfort, Sport, and Manual driving modes
Adaptive transmission control for dynamic driving conditions
Seamless integration with BMW's iDrive system

Note: Driving modes can be customized via the iDrive interface.

Search Specifications

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Transmission Specifications

General information

Transmission Type: 8-speed automatic

Manufacturer: ZF Friedrichshafen AG

Model: 8HP

Part Number: 8HP45

Application: 2008-2015 BMW 740i

Fluid Type: ZF Lifeguard 8

Fluid Capacity: 9.5 liters

Dimensions And Weight

Length: 720 mm

Width: 550 mm

Height: 420 mm

Weight: 87 kg

Gear Ratios

1st Gear: 4.714:1

2nd Gear: 3.143:1

3rd Gear: 2.106:1

4th Gear: 1.667:1

5th Gear: 1.285:1

6th Gear: 1.000:1

7th Gear: 0.839:1

8th Gear: 0.667:1

Reverse Gear: 3.317:1

Torque Capacity

Maximum input Torque: 450 Nm

Maximum Output Torque: 600 Nm

Operational Parameters

Maximum Engine Speed: 7000 rpm

Maximum Transmission Speed: 8000 rpm

Operating Temperature Range: -40°C to 150°C

Shift Response Time: 200 ms

Control System

Control Unit: EGS (Electronic Transmission Control)

Sensors

Input speed sensor
Output speed sensor
Transmission fluid temperature sensor
Turbine speed sensor

Actuators

Solenoid valves
Pressure control valves
Shift valves

Maintenance Specifications

Fluid Change interval: 60,000 miles or 48 months

Filter Change interval: 60,000 miles or 48 months

Seal inspection Interval: 100,000 miles or 84 months

Torque Converter inspection Interval: 100,000 miles or 84 months

Diagnostic Specifications

Diagnostic Tool: BMW ISTA/D

Fault Codes

P0700 - Transmission Control System Malfunction
P0715 - Input/Turbine Speed Sensor Circuit Malfunction
P0720 - Output Speed Sensor Circuit Malfunction
P0730 - Incorrect Gear Ratio

Diagnostic Procedures

Check for fault codes using ISTA/D
Inspect wiring and connectors
Test sensor and actuator functionality
Perform adaptation reset if necessary

Safety information

Warning: Always disconnect the battery before performing any transmission service

Precautions

Use only specified transmission fluid
Ensure proper torque specifications are followed during reassembly
Avoid contamination of transmission components during service

Related Components

Engine: N63B44 (4.4L V8 Twin-Turbo)

Driveshaft: Part Number: 26107553873

Differential: Part Number: 33107553874

Cooling System: Transmission oil cooler integrated into radiator

Service Information Service

Detailed service requirements and schedules for the ZF 8HP transmission in the 2008-2015 BMW 740i

60,000

Transmission fluid change
Transmission filter replacement
Inspect transmission seals and gaskets

Use only ZF Lifeguard 8 transmission fluid

100,000

Inspect torque converter
Inspect transmission mounts
Perform transmission adaptation reset

Check for any signs of wear or damage

Common Questions

Find answers to common questions about torque specifications

What is the torque capacity of the ZF 8HP transmission in the 2008-2015 BMW 740i?

The ZF 8HP transmission used in the 2008-2015 BMW 740i has a torque capacity of up to 700 Nm (516 lb-ft). This allows it to handle the high torque output of the N63 4.4L V8 engine, which produces up to 445 Nm (328 lb-ft) of torque.

What is the recommended service interval for the ZF 8HP transmission fluid?

BMW recommends servicing the ZF 8HP transmission fluid every 60,000 to 100,000 miles, depending on driving conditions. This includes replacing the transmission fluid and filter to ensure optimal performance and longevity. Always refer to the vehicle's service manual for specific recommendations.

Can the ZF 8HP transmission be reprogrammed or updated?

Yes, the ZF 8HP transmission can be reprogrammed or updated using BMW's ISTA diagnostic software. Updates may include improved shift logic, enhanced performance, and fixes for known issues. Reprogramming should only be performed by a certified BMW technician using genuine BMW software.

What type of transmission fluid is required for the ZF 8HP transmission?

The ZF 8HP transmission requires ZF Lifeguard 8 transmission fluid, which is specifically formulated for this transmission. Using the correct fluid is critical to ensure proper operation and avoid damage. The fluid capacity is approximately 9.5 liters (10 quarts) when performing a complete fluid change.

What are common symptoms of a failing ZF 8HP transmission?

Common symptoms of a failing ZF 8HP transmission include harsh or delayed shifting, slipping gears, transmission warning lights, and unusual noises such as whining or grinding. If any of these symptoms occur, it is recommended to have the transmission inspected by a qualified technician immediately.

Factory Service Resources

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

ZF 8HP Transmission Technical Manual

Coming Soon

Official technical manual from ZF detailing the specifications, maintenance procedures, and troubleshooting for the 8HP transmission.

BMW 740i Service Schedule

Coming Soon

Detailed service schedule for the 2008-2015 BMW 740i, including transmission maintenance intervals and recommended procedures.

ZF Lifeguard 8 Fluid Specifications

Coming Soon

Technical datasheet for ZF Lifeguard 8 transmission fluid, including compatibility and usage guidelines.

BMW ISTA Diagnostic Software Guide

Coming Soon

Guide to using BMW's ISTA diagnostic software for reprogramming and updating the ZF 8HP transmission.

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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.
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