6-speed automatic transmission for Jaguar S-Type XF XJ XR8P-BC BD9C08
The ZF 6HP26 (and its Jaguar variant 6R83) is the 6-speed automatic transmission that revolutionized the Jaguar lineup starting in 2002/2003. It replaced the previous 5-speed units across the S-Type, XJ (X350), and later the XF.
The part numbers you mentioned, XR8P-BC and BD9C08, are internal Jaguar casting or identification codes often found on the transmission casing of the 3.0L V6 and 4.2L V8 models.
1. Identifying the ZF 6HP26 / 6R83
This transmission was an “industry first” when launched in the S-Type. It is significantly lighter and more efficient than its predecessor (the 5HP24), using a Lepelletier planetary gearset that allows for more ratios with fewer parts.
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Jaguar S-Type: Fitted to all models from 2003–2008 (V6, V8, and Diesel).
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Jaguar XJ (X350/X358): Standard on all V6 and V8 models from 2003–2009.
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Jaguar XF (X250): Used in early 4.2L and 3.0L models from 2008–2010 before being phased out for the 8-speed ZF 8HP.
2. Common Issues: The “Jaguar Lurch”
While generally robust, the 6HP26 is famous for a few specific quirks:
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The Lurch: A common software-induced issue where the car surges or jerks just before coming to a complete stop. This is often cured by a TCM (Transmission Control Module) software reflash or “clearing the adaptations.”
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Mechatronic Sleeve Leak: The plastic electrical connector sleeve (located at the rear of the transmission) is notorious for leaking fluid. If left unchecked, fluid can wick into the wiring loom and cause electronic faults.
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The “Squawk”: A noise during the 3-4 gear shift under acceleration. This is typically resolved by adding a specific friction modifier (Sturaco) or performing a full fluid service with ZF Lifeguard 6.
3. Maintenance Guide
Jaguar famously claimed these were “Sealed for Life,” but ZF recommends servicing them every 60,000 to 80,000 miles.
| Requirement | Specification / Part |
| Fluid Type | ZF Lifeguard 6 (or Shell M-1375.4 / Ford Mercon SP). |
| Pan/Filter | The filter is integrated into the plastic oil pan. You must replace the entire pan to change the filter. |
| Fill Level | Must be checked at 30°C–50°C while the engine is running and the car is perfectly level. |
| Bolt Torque | Transmission pan bolts should be torqued to 10 N·m in a specific cross-pattern. |
4. 2026 Estimated Costs
Prices for used and refurbished units have stabilized as the supply of donor cars remains steady.
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Used Transmission (Tested): $600 – $950 (Often found on eBay with IDs matching your XR8P-BC code).
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Full Service Kit (Pan, Fluid, Bolts): $250 – $380.
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Remanufactured Unit: $3,500 – $5,000 (Usually includes a new Mechatronic unit and a multi-year warranty).
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