Generally, this transmission is referred to as the ZF 5HP-24A. It’s the 4×4 version (incorporating the Quattro mechanism) of the rear-wheel drive ZF 5HP-24 as used in some 4.0-and-above liter BMWs, Jaguars and Range Rovers made from 1997 or so until 2004 or so.
As I understand things, it’s a refinement of the ZF 5HP-30.
On the Audi Quattros and VW Phaeton, the 5HP-24A has at least 14 different variations. Each variation is identified using one of three ways:
- A ZF Part number
- A VW/Audi part number
- A three-letter code
The 5HP-24A was first used on the A8 Quattro 4.2 V8. As to variations, the information below comes from the ZF Remanufactured Transmissions catalog, ZF Spare Parts catalog, our correspondence with savvy people, and our own in-person observations.
There were three successive variations of the early version of this transmission, respectively identified as:
- 1058020004 – 01L300041B – “DPZ”
- 1058020007 – 01L300041D – “DSM”
- 1058020009 – 01L300041G – “DTE”
All of these were used on the early Audi D2 A8 Quattro 4.2 V8 built through 02/1999. The internals of the early version have pretty much everything in common with the later version but the nuances are different enough that mixing parts (internal) or transmissions (as a whole) is not a good idea, according to one ZF guru (who probably would rather not be quoted here).
One way to easily see you’re dealing with an early version is that there are three blue solenoids and five green solenoids at the back of the valve body. (I’m using the phrase “solenoid” loosely since some of these have a more complex function than just turning on or off.)
Ideally, you’ll want to replace the transmission you have with an identically-numbered one if viable. If it’s not, then at least don’t mix early with late versions.
The variations of the late version as used in the A8 Quattro 4.2 V8 are:
- 1058020014 – 01L300042A – “EDG”
- 1058020021 – 01L300042N – “FBF”
- 1058020033 – 01L300043C – “FUN”
The variations used in the A6 Quattro 4.2 V8 are all late-version:
- 1058020015 – 01L300041M – “ECF”
- 1058020018 – 01L300042K – “FBC”
- 1058020031 – 01L300043A – “FUL”
The variation used in the S6 Quattro 4.2 V8 is late-version too:
- 1058020029 – 01L300042L – “FBD”
The variation used in the S8 Quattro 4.2 V8 is late-version too:
- 1058020030 – 01L300042P – “FBG”
The variation used in the RS6 Quattro 4.2 V8 is late-version too:
- 1058020035 – 01L300043E – “GAG”
The variation used in the VW Phaeton is late-version too:
- 1058020027 – 01L300042S – “FGE”
- 1058020037 – 01L3000??? – “GXX”
As far as we are aware, the S6 and S8 variants differ as to the torque converter, and differential and axles — the latter so as to effect a different-ratio final drive.
The RS6 variant differs much more yet.
One of our advisers explains that the VW Phaeton uses the 5HP-24A except for the last units around 2009, which used 6HP-19A units. He also explains that the VW Phaeton valve body is different than any A8 in one respect: the upper rear housing. The casting is stamped as 1058-427-068 and that designates the “not-yet-machined” part. The part, as machined, would be 1058-327-068 for the A8 but for the VW Phaeton, it is machined differently, to have a different piston in one of the bores. For that situation, the part number is 1058-327-075 and there’s a “075” actually stamped into the relevant housing for identification.
If your transmission has a variation number that doesn’t exactly match the transmission you’re buying from us, we intend to first get an explicit OK from ZF or a ZF distributor as to interchanging.
To see which variation you have, look at the green plate affixed to the transmission, on the driver side, in front of the front drive shaft. It’ll show the ZF part number and the three-letter code, toward the right.