BMW X7 2019-present

BMW X7 2019-present ZF 8HP Transmission Specifications

Detailed technical specifications for the ZF-8HP automatic transmission used in the 2019-Present BMW X7. This document covers gear ratios, torque capacity, fluid specifications, shift logic, and diagnostic protocols specific to the ZF-8HP transmission system.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the ZF 8HP transmission specifications for the 2019-Present BMW X7, 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: General Specifications, Gear Ratios, Torque Capacity, and Maintenance Requirements.

Key Specifications

Maximum Input Torque

750 Nm

Fluid Capacity

9.5 liters

Overall Gear Spread

7.07:1

Weight (Dry)

87 kg

Towing Capacity

3,500 kg

Available Specifications

General Specifications

This section provides an overview of the ZF 8HP transmission's general specifications, including dimensions, weight, and fluid requirements.

Dimensions and Weight

Overall length: 720 mm
Width: 520 mm
Height: 340 mm
Weight: 87 kg (dry)
Housing material: Aluminum alloy

Fluid Requirements

Transmission fluid type: ZF Lifeguard 8
Fluid capacity: 9.5 liters
Fluid change interval: 80,000 km or 5 years
Operating temperature range: -40°C to 150°C

Note: Use only ZF-approved transmission fluid to ensure optimal performance and longevity.

Gear Ratios

This section details the gear ratios of the ZF 8HP transmission, including forward and reverse gears.

Forward 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

Reverse Gear Ratio

Reverse gear: 3.317:1
Final drive ratio: 3.15:1
Overall gear spread: 7.07:1

Note: The wide gear spread ensures optimal performance across various driving conditions.

Torque Capacity

This section covers the torque handling capabilities of the ZF 8HP transmission, including maximum input torque and load limits.

Maximum Input Torque

Maximum input torque: 750 Nm
Torque converter lock-up clutch: Yes
Torque converter diameter: 270 mm
Torque converter stall ratio: 1.9:1

Load Limits

Maximum axle load: 3,500 kg
Maximum towing capacity: 3,500 kg
Maximum GVWR: 3,300 kg

Note: Ensure that the vehicle's load does not exceed the specified limits to prevent transmission damage.

Maintenance Requirements

This section outlines the maintenance requirements for the ZF 8HP transmission, including service intervals and inspection procedures.

Service Intervals

Transmission fluid change: Every 80,000 km or 5 years
Filter replacement: Every 80,000 km or 5 years
Seal inspection: Every 40,000 km
Software updates: As per BMW service bulletins

Inspection Procedures

Check for fluid leaks during every service
Inspect transmission mounts for wear
Verify proper operation of the torque converter
Perform diagnostic scan for error codes

Note: Regular inspections are crucial to maintaining the transmission's performance and reliability.

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Transmission Specifications

General information

Transmission Type: 8-speed automatic

Manufacturer: ZF Friedrichshafen AG

Model: 8HP

Part Number: 8HP75X

Compatibility: 2019-Present BMW X7

Weight: 94 kg (207 lbs)

Dimensions

Length: 720 mm (28.35 in)

Width: 550 mm (21.65 in)

Height: 380 mm (14.96 in)

input Shaft Length: 120 mm (4.72 in)

Output Shaft Length: 150 mm (5.91 in)

Torque Capacity

Maximum input Torque: 750 Nm (553 lb-ft)

Maximum Output Torque: 750 Nm (553 lb-ft)

Torque Converter Stall Torque: 2.2:1

Gear Ratios

1st Gear: 4.714

2nd Gear: 3.143

3rd Gear: 2.106

4th Gear: 1.667

5th Gear: 1.285

6th Gear: 1.000

7th Gear: 0.839

8th Gear: 0.667

Reverse Gear: 3.317

Fluid Specifications

Fluid Type: ZF Lifeguard 8

Fluid Capacity: 9.5 liters (10.04 quarts)

Fluid Change interval: 60,000 miles or 60 months

Fluid Temperature Range: -40°C to 150°C (-40°F to 302°F)

Operational Parameters

Maximum Engine Speed: 7,000 rpm

Maximum Vehicle Speed: 250 km/h (155 mph)

Shift Response Time: 200 milliseconds

Towing Capacity: 3,500 kg (7,716 lbs)

Electronic Control

Control Unit: EGS (Electronic Transmission Control)

Communication Protocol: CAN bus

Software Version: v2.3.1

Diagnostic interface: OBD-II

Maintenance Specifications

Filter Replacement interval: 60,000 miles or 60 months

Seal inspection Interval: 30,000 miles or 30 months

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

Pan Gasket Replacement interval: 60,000 miles or 60 months

Diagnostic Specifications

Fault Codes

P0700
P0715
P0720
P0730
P0741

Diagnostic Tools

BMW ISTA
Autologic
Launch X431

Diagnostic Procedures

Check transmission fluid level and condition
Perform adaptation reset
Check for fault codes and clear if necessary

Safety information

Warning: Do not operate the vehicle with low transmission fluid

Caution: Ensure the transmission is at operating temperature before performing diagnostics

Note: Use only ZF Lifeguard 8 fluid to avoid damage to the transmission

Service Information Service

Detailed service requirements and schedules for the ZF 8HP transmission

30,000 miles

30 months

Inspect transmission fluid level
Check for leaks
Inspect transmission mounts

Perform visual inspection and top off fluid if necessary

60,000 miles

60 months

Replace transmission fluid
Replace transmission filter
Inspect and replace pan gasket if necessary

Use only ZF Lifeguard 8 fluid for replacement

100,000 miles

100 months

Inspect torque converter
Perform transmission adaptation reset
Check for wear on internal components

Consult BMW ISTA for detailed diagnostic procedures

Common Questions

Find answers to common questions about torque specifications

What is the torque capacity of the ZF-8HP transmission in the 2019-Present BMW X7?

The ZF-8HP transmission used in the 2019-Present BMW X7 has a torque capacity of up to 740 Nm (546 lb-ft). This allows it to handle the high torque output of the X7's engines, including the 4.4L V8 and 3.0L inline-6 variants.

How many gears does the ZF-8HP transmission have?

The ZF-8HP transmission is an 8-speed automatic transmission. It features eight forward gears and one reverse gear, providing smooth and efficient power delivery across a wide range of driving conditions.

What is the recommended service interval for the ZF-8HP transmission in the BMW X7?

BMW recommends servicing the ZF-8HP transmission every 60,000 to 100,000 miles, depending on driving conditions. This includes changing the transmission fluid and filter to ensure optimal performance and longevity.

Can the ZF-8HP transmission be reprogrammed or updated?

Yes, the ZF-8HP transmission can be reprogrammed or updated with the latest software from BMW. This can improve shift quality, performance, and fuel efficiency. Updates should be performed by a certified BMW technician using official BMW diagnostic tools.

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 to the transmission.

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 for the 8HP transmission, covering specifications, maintenance procedures, and troubleshooting.

BMW X7 Service Schedule

Coming Soon

Detailed service schedule for the 2019-Present BMW X7, including transmission service intervals and recommended procedures.

ZF Lifeguard 8 Fluid Specifications

Coming Soon

Technical specifications and usage guidelines for ZF Lifeguard 8 transmission fluid, required for the ZF-8HP transmission.

BMW ISTA Diagnostic Software Guide

Coming Soon

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

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Technical Information

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