BMW 540i 2011-2016 ZF 8HP Transmission Specifications
Comprehensive technical specifications for the ZF-8HP 8-speed automatic transmission used in the 2011-2016 BMW 540I. This document covers gear ratios, torque capacity, fluid specifications, shift logic, and diagnostic codes specific to this transmission model.
Overview Specifications
Comprehensive description of the zf-8hp-transmission specifications for the 2011-2016 bmw 540I, including key features, measurements, and technical details
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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 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 (RWD) configuration
- Compact and lightweight design with a total weight of 87 kg (191.8 lbs)
- Modular construction for easy integration with BMW's N55 engine
Gear Ratios and Shift Logic
- Gear ratios: 1st (4.714), 2nd (3.143), 3rd (2.106), 4th (1.667), 5th (1.285), 6th (1.000), 7th (0.839), 8th (0.667)
- Reverse gear ratio: 3.317
- Adaptive shift logic for optimized performance and fuel efficiency
- Supports manual shifting via paddle shifters
Note: Gear ratios are optimized for smooth acceleration and fuel economy.
Performance and Torque Capacity
Technical details about the transmission's performance capabilities and torque handling
Performance and Torque Capacity
Technical details about the transmission's performance capabilities and torque handling
Torque Capacity
- Maximum torque capacity: 500 Nm (368.8 lb-ft)
- Designed to handle the N55 engine's peak torque of 450 Nm (331.9 lb-ft)
- High-strength materials used in gear construction for durability
Shift Speed and Efficiency
- Shift times as low as 200 milliseconds
- Improved fuel efficiency by up to 6% compared to previous 6-speed transmissions
- Reduced internal friction for smoother operation
Note: Shift times are optimized for both performance and comfort.
Fluid and Maintenance Specifications
Information about transmission fluid requirements and maintenance intervals
Fluid and Maintenance Specifications
Information about transmission fluid requirements and maintenance intervals
Transmission Fluid Specifications
- Recommended fluid: ZF Lifeguard 8
- Fluid capacity: 9.5 liters (10.0 quarts)
- Fluid change interval: 80,000 km (50,000 miles) or 8 years
- Operating temperature range: -40°C to 150°C (-40°F to 302°F)
Maintenance and Service
- Sealed transmission design with no dipstick for fluid level checks
- Fluid level must be checked using diagnostic tools
- Filter integrated into the transmission pan, replaced during fluid changes
Note: Use only ZF-approved fluids to ensure optimal performance.
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Transmission Specifications
General information
- Transmission Type
- 8-speed automatic
- Manufacturer
- ZF Friedrichshafen AG
- Model
- 8HP
- Part Number
- 8HP45
- Compatibility
- 2011-2016 BMW 540I
- Fluid Type
- ZF Lifeguard 8
- Fluid Capacity
- 9.5 liters
Dimensions And Weight
- Length
- 720 mm
- Width
- 550 mm
- Height
- 400 mm
- Weight
- 87 kg
- Bell Housing Material
- Aluminum alloy
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
- Torque Converter Lockup Speed
- 1500 rpm
Operational Parameters
- Maximum Engine Speed
- 7000 rpm
- Shift Response Time
- 200 ms
- Operating Temperature Range
- -40°C to 150°C
- Maximum Fluid Temperature
- 120°C
Electronic Control
- 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
- Communication Protocol
- CAN bus
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
- Fluid Specification
- ZF Lifeguard 8 (part number: S671 090 312)
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
- P0741 - Torque Converter Clutch Circuit Performance or Stuck Off
- Diagnostic Procedures
-
- Check for stored fault codes
- Inspect wiring and connectors
- Perform solenoid valve resistance test
- Check transmission fluid level and condition
Safety information
- Warning
- Always disconnect the battery before servicing the transmission
- Precautions
-
- Use only specified transmission fluid
- Avoid over-tightening bolts during reassembly
- Ensure proper alignment during installation
- Emergency Procedures
-
- In case of fluid leakage, stop the vehicle immediately
- If transmission overheats, allow it to cool before continuing
Related Components
- Engine
- N55B30 (3.0L Turbocharged Inline-6)
- Driveshaft
- Part number: 26107553851
- Differential
- Part number: 33107553852
- Mounts
-
- Transmission mount (part number: 22316771845)
- Engine mount (part number: 22116771846)
Service Information Service
Detailed service requirements and schedules for the ZF 8HP transmission in the 2011-2016 BMW 540I
- Inspect transmission fluid level
- Check for leaks
- Inspect transmission mounts
Perform visual inspection and address any issues immediately
- Replace transmission fluid
- Replace transmission filter
- Inspect and clean transmission pan
Use only ZF Lifeguard 8 fluid for replacement
- Inspect torque converter
- Inspect seals and gaskets
- Perform full diagnostic scan
Replace any worn or damaged components
Common Questions
Find answers to common questions about torque specifications
Q1 What is the torque capacity of the ZF 8HP transmission in the 2011-2016 BMW 540i?
What is the torque capacity of the ZF 8HP transmission in the 2011-2016 BMW 540i?
The ZF 8HP transmission used in the 2011-2016 BMW 540i has a torque capacity of up to 700 Nm (516 lb-ft). This ensures compatibility with the N55B30 engine, which produces a maximum torque of 450 Nm (332 lb-ft).
Q2 What is the recommended transmission fluid for the ZF 8HP in the BMW 540i?
What is the recommended transmission fluid for the ZF 8HP in the BMW 540i?
ZF Lifeguard 8 is the recommended transmission fluid for the ZF 8HP transmission. The fluid capacity is approximately 9.5 liters (10 quarts), and it must meet ZF's specifications (TE-ML 14). Using incorrect fluid can lead to transmission damage.
Q3 How often should the transmission fluid be changed in the ZF 8HP?
How often should the transmission fluid be changed in the ZF 8HP?
BMW recommends a transmission fluid and filter change every 60,000 to 100,000 miles (96,000 to 160,000 km) under normal driving conditions. Severe driving conditions, such as frequent towing or stop-and-go traffic, may require more frequent service intervals.
Q4 What are the common symptoms of a failing ZF 8HP transmission?
What are the common symptoms of a failing ZF 8HP transmission?
Common symptoms include harsh shifting, delayed engagement, slipping gears, transmission warning lights, and unusual noises such as whining or grinding. These issues may indicate low fluid levels, worn components, or internal damage requiring professional diagnosis.
Q5 Can the ZF 8HP transmission be reprogrammed or updated?
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, adapt to driving habits, or address known issues. Reprogramming should only be performed by a certified technician.
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 SoonA detailed technical guide covering the design, operation, and specifications of the ZF 8HP transmission.
BMW 540i Service Manual (2011-2016)
Coming SoonThe official service manual for the 2011-2016 BMW 540i, including transmission maintenance and repair procedures.
ZF Lifeguard 8 Fluid Specifications
Coming SoonTechnical data sheet for ZF Lifeguard 8 transmission fluid, including compatibility and usage guidelines.
BMW ISTA Diagnostic Software Guide
Coming SoonA guide to using BMW's ISTA software for diagnosing 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.
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- If you're unsure about any procedure, consult a qualified professional mechanic.
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