BMW X4 2014-2018

BMW X4 2014-2018 ZF 8HP Transmission Specifications

Comprehensive technical specifications for the ZF-8HP automatic transmission used in the 2014-2018 BMW X4. This document covers gear ratios, torque capacity, fluid requirements, shift logic, and diagnostic codes specific to the ZF-8HP transmission system.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the ZF 8HP transmission specifications for the 2014-2018 BMW X4, 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 listed below.

Key Specifications

Transmission Type

8-speed automatic

Torque Capacity

500 Nm (368.8 lb-ft)

Fluid Capacity

9.5 liters (10.0 quarts)

Weight

87 kg (191.8 lbs)

Shift Time

200 milliseconds

Available Specifications

Transmission Design and Architecture

Details about the design, architecture, and key components of the ZF 8HP transmission.

Transmission Type and Layout

8-speed automatic transmission
Longitudinal mounting for rear-wheel-drive and all-wheel-drive configurations
Compact and lightweight design with a total weight of 87 kg (191.8 lbs)
Modular design allowing integration with hybrid systems

Gear Ratios

1st gear: 5.000:1
2nd gear: 3.200:1
3rd gear: 2.143:1
4th gear: 1.720:1
5th gear: 1.314:1
6th gear: 1.000:1
7th gear: 0.822:1
8th gear: 0.640:1
Reverse gear: 4.917:1

Note: Gear ratios optimized for performance and fuel efficiency.

Performance and Capabilities

Technical specifications related to the performance and operational capabilities of the ZF 8HP transmission.

Torque Capacity

Maximum torque capacity: 500 Nm (368.8 lb-ft)
Designed to handle high-performance engines
Supports both gasoline and diesel engines

Shift Times and Efficiency

Shift times as low as 200 milliseconds
Improved fuel efficiency by up to 11% compared to previous generations
Adaptive shift programs for dynamic driving conditions

Note: Shift times vary based on driving mode and conditions.

Maintenance and Fluid Specifications

Information on maintenance requirements and fluid specifications for the ZF 8HP transmission.

Fluid Capacity and Type

Total fluid capacity: 9.5 liters (10.0 quarts)
Recommended fluid: ZF Lifeguard 8
Fluid change interval: 80,000 km (50,000 miles) or as per BMW's maintenance schedule

Maintenance Procedures

Regular inspection of transmission fluid level and condition
Use of diagnostic tools for error code reading and resetting
Replacement of transmission pan and filter during fluid changes

Note: Always use manufacturer-recommended fluids and parts.

Search Specifications

Search by specification name, value, or description

Transmission Specifications

General information

Transmission Type: 8-speed automatic

Manufacturer: ZF Friedrichshafen AG

Model: 8HP

Part Number: 8HP50X

Application: 2014-2018 BMW X4

Fluid Type: BMW ATF-3 or equivalent

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: 500 Nm

Maximum Output Torque: 3000 Nm

Operational Parameters

Maximum Engine Speed: 7000 rpm

Maximum Transmission Speed: 8000 rpm

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

Fluid Pressure: 2.5 to 4.5 bar

Control System

Control Unit: EGS (Electronic Transmission Control)

Sensors

Input speed sensor
Output speed sensor
Temperature sensor
Pressure sensor

Actuators

Solenoid valves
Hydraulic pressure control 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
Perform transmission adaptation reset

Safety information

Warning: Always disconnect the battery before performing any transmission service

Caution: Use only approved transmission fluid to avoid damage

Note: Ensure proper torque specifications are followed during reassembly

Related Components

Engine: N20/N26/N55/B58

Transfer Case: BMW xDrive

Driveshaft: BMW-specific driveshaft

Differential: BMW-specific differential

Service Information Service

Detailed service requirements and schedules for the ZF-8HP transmission

60,000

Transmission fluid change
Transmission filter replacement
Inspect transmission seals

Use only BMW-approved ATF-3 fluid

100,000

Inspect torque converter
Inspect transmission mounts
Perform transmission adaptation reset

Check for any leaks or unusual noises

Common Questions

Find answers to common questions about torque specifications

What is the torque capacity of the ZF 8HP transmission in the 2014-2018 BMW X4?

The ZF 8HP transmission used in the 2014-2018 BMW X4 has a torque capacity of up to 700 Nm (516 lb-ft), making it suitable for both gasoline and diesel engines within this range.

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. Always refer to the vehicle's service manual or consult a BMW-certified technician 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 improve shift quality, performance, and compatibility with newer engine control units (ECUs).

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 longevity.

How many gears does the ZF 8HP transmission have?

The ZF 8HP transmission is an 8-speed automatic transmission, providing smooth and efficient gear changes across a wide range of driving conditions.

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

Common symptoms include harsh shifting, delayed engagement, transmission slipping, unusual noises, and warning lights on the dashboard. If any of these occur, immediate inspection by a qualified technician is recommended.

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 Overview

Coming Soon

A detailed technical overview of the ZF 8HP transmission, including its design, features, and compatibility with BMW vehicles.

BMW X4 Transmission Service Guide

Coming Soon

Step-by-step guide for servicing the ZF 8HP transmission in the 2014-2018 BMW X4, including fluid replacement and diagnostic procedures.

ZF Lifeguard 8 Fluid Specifications

Coming Soon

Detailed specifications and compatibility information for ZF Lifeguard 8 transmission fluid, required for the ZF 8HP transmission.

BMW ISTA Diagnostic Software Guide

Coming Soon

A guide to using BMW's ISTA diagnostic software for updating and reprogramming 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.
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.
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