SIX-IN-LINE · TRANSMISSION CATALOGUE
ZF 8HP55
ZF 8HP55: Excel reference ratios, torque and fluid data for a 8-speed transmission. Manufacturer verification of family data is not yet complete.
The technical figures apply at transmission-family level and have not yet been fully verified against manufacturer sources. Identify the exact version using the full manufacturer identifier.
This database is the result of research carried out by Six-In-Line Kft. in its spare time.
Excel provides only general technical data for this type. BMW application cannot be established from it.
Technical data
- Transmission version
- 8 -speed automatic
- Reference torque limit
- 650 Nm
- Period stated in Excel
- Nincs megadva
- BMW code reference
- No separately verified code
The torque limit is a transmission figure from the source; it does not establish engine torque or permissible tuning. The stated years do not represent complete BMW application periods.
Gear ratios
| Gear | 8HP 55 (Gen1) | Engaged clutches / brakesFamily reference · exact variant unverified |
|---|---|---|
| Torque limit | 650 Nm | — |
| 1 gear | 4,714 | A + B + Cfamily reference |
| 2 gear | 3,143 | A + B + Efamily reference |
| 3 gear | 2,106 | B + C + Efamily reference |
| 4 gear | 1,667 | B + D + Efamily reference |
| 5 gear | 1,285 | B + C + Dfamily reference |
| 6 gear | 1,000 | C + D + Efamily reference |
| 7 gear | 0,839 | A + C + Dfamily reference |
| 8 gear | 0,667 | A + D + Efamily reference |
| Reverse (R) | -3,317 | A + B + Dfamily reference |
The negative reverse sign is retained from Excel.
Fluid data
- ZF Lifeguard Fluid 8
The fluid name from Excel is not a manufacturer approval. Select fluid using the full transmission identifier and current ZF/BMW requirements. “Lifetime” alone is not a fluid specification.
ZF fluids and oil change kitsZF identification
Record the full marking on the transmission housing. ZF’s guide shows both plate and stamped identification variants.
- Type designation
- The exact type shown on the plate, including every suffix.
- Full ZF catalogue number
- Catalog Number / bill-of-materials number. The full number is required to identify parts.
- Serial number
- Serial Number. Identifies the individual unit; not the same as the transmission family code.
- BMW / OE markings
- Manufacturer part numbers and other codes on the plate. Available fields vary by version.
The prefix is not a complete order number and does not by itself confirm compatibility of the specific version.
Label colour, casting marks and a suffix alone are insufficient for full identification. We do not use Excel’s general “X and Z = all-wheel drive” statement to identify the drivetrain.
ZF manufacturer identification guide (Transmission ID Charts, PDF page 3)Documented European applications (0)
F21, F22, F23, F30, F31, F36, F80, F87, G30 and F90 fitments come from research carried out by Six-In-Line Kft. in its spare time. Additional manufacturer sources and discrepancies are shown beside each result.
No verified European vehicle pairing is recorded for this type yet. This does not mean it was not used in BMWs.
Sources and data status
ZF-BMW Váltó Beazonosító Katalógus.xlsx
Imported: 29 September 2026. Import does not imply full technical verification.
- Technical data: B19:N19 (8HP 55 (Gen1))
Always check the full manufacturer identifier and the actual version on your own transmission.
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