BMW E38 735 740 E39 535 540 V8 M62 ZF automatic transmission 5-HP 24
ZF 5HP24 (internally designated as the A5S 440Z by BMW) is a legendary, yet complex, 5-speed longitudinal automatic transmission. It was specifically engineered to handle the high-torque output of the M62 and M62TU V8 engines found in the flagship E38 7 Series and the E39 5 Series.
Known for its smooth shifting and “Adaptive Transmission Control” (AGS), it remains a cornerstone of BMW’s late-90s engineering.
Technical Specifications
| Feature | Details |
| Max Torque Capacity | 440 Nm ($approx$ 325 lb-ft) |
| Weight | $approx$ 95 kg (210 lbs) |
| Fluid Type | Esso/Mobil LT 71141 (Semi-synthetic “Lifetime” fluid) |
| Control System | Bosch GS8.6x Transmission Control Unit (TCU) |
Key Applications
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BMW E38 (7 Series): 735i, 740i, 740iL (1996–2001)
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BMW E39 (5 Series): 535i, 540i (1996–2003)
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Other Notable Uses: Range Rover HSE (L322 with the BMW M62 engine), Jaguar XJ8/XK8, and the Aston Martin DB7.
Critical Maintenance & Common Issues
While the 5HP24 is robust, it is susceptible to specific mechanical failures as the mileage climbs:
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Pressure Regulator Valve: The most common failure point. The valve in the main valve body wears down, leading to pressure spikes that can physically crack the “A” clutch drum.
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The “A” Clutch Drum: When the pressure regulator fails, the “A” drum (responsible for 1st–4th gears) often shears or cracks. This results in a loss of forward drive or severe “clunking” into gear.
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Torque Converter Lock-up: The seal inside the torque converter can wear, causing a “shudder” or “RPM hunting” while cruising at steady speeds between 40–60 mph.
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The “Lifetime Fluid” Myth: While BMW marketed the fluid as lifetime, ZF (the manufacturer) recommends changes every 50,000 to 75,000 miles to preserve the valve body and clutch packs.
Essential Components for a Refresh
If you are listing this for inventory or preparing for a rebuild, these are the high-demand parts:
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Valve Body Rebuild Kit: Specifically including the upgraded oversized pressure regulator valve.
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Heavy Duty “A” Drum: Reinforced aftermarket versions are preferred over OEM to prevent future shearing.
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Filter & Gasket Kit: Ensure the filter is a Filtran brand (the original supplier) for correct flow rates.
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