Identification, Construction, Common Failures and Repair
About this Guide
This guide is based on our experience repairing and supplying components for the PL72T transfer case since 2019.
Rather than repeating generic catalog descriptions, it focuses on transfer case identification, construction, common failure modes and repair practices observed during real-world rebuilds.
Transfer Case Families
Volkswagen Amarok (first generation) was equipped with two fundamentally different transfer case families.
Although both perform the same function, they differ significantly in construction, operating principle and spare parts.
Part-Time 4WD
Typical characteristics:
- Selectable four-wheel drive
- Driving modes: 2H / 4H / 4L
- Two-speed transfer case with low range
- Electric shift actuator
- Typically installed on vehicles equipped with a manual transmission
Typical OE numbers begin with:
0C7...
Permanent 4MOTION (Permanent AWD)
Typical characteristics:
- Permanent all-wheel drive
- Mechanical Torsen centre differential
- No selectable 2H / 4H modes
- No electric shift actuator
- Typically installed on vehicles equipped with an automatic transmission
Typical OE numbers begin with:
0BU...
Transfer case designation:
PL72T
The remainder of this guide focuses on the PL72T transfer case.
Identification
Vehicle model alone is not sufficient to identify the transfer case.
Always verify the OE number or identification plate located on the transfer case housing before ordering replacement parts.
| OE Prefix | Transfer Case Family |
| 0C7... | Part-Time 4WD |
| 0BU... | PL72T Permanent 4MOTION |
PL72T Construction
PL72T is a mechanical permanent all-wheel-drive transfer case using a Torsen centre differential.
Correct identification of internal components is essential for a successful repair.
Our interactive PL72T Exploded View & Parts Catalog provides:
- complete exploded view;
- OEM part numbers;
- component identification;
- direct links to replacement parts.
Failure Analysis
Torsen Centre Differential
Based on our repair experience, the original Torsen centre differential is the most common point of failure in the PL72T transfer case.
As wear progresses, the differential may seize in one of two positions.
Front axle no longer receives torque
In this condition, the vehicle effectively operates as rear-wheel drive.
Although four-wheel drive is lost, this failure mode normally does not cause secondary damage to the transfer case or front drivetrain.
Front axle remains permanently engaged
This is the more serious failure mode.
Continuous torque transfer to the front axle places additional loads on the front drivetrain. Continued operation may eventually damage the front differential, resulting in significantly more expensive repairs than replacing the transfer case differential alone.
Drive Chain
In most rebuilt transfer cases, differential wear is accompanied by chain wear.
PL72T transfer cases were produced with two chain widths:
- 1.00 inch
- 1.25 inch
The correct replacement chain must always be selected according to the transfer case version.
Bearings
Bearing failures are comparatively uncommon.
However, because complete disassembly is already required during overhaul, replacing all bearings at the same time is considered good repair practice.
Oil Seals
Oil seals are not generally regarded as a weak point of the PL72T.
However, they must be removed during disassembly to access the retaining rings beneath them. For this reason, every complete overhaul includes a new set of oil seals.
Reinforced Torsen Differential
To address the most common PL72T failure, we developed a reinforced replacement Torsen differential.
The reinforced differential has been supplied since 2019 and has accumulated more than five years of field experience.
Today these differentials operate in a wide range of environments, including:
- Arctic regions;
- temperate climates;
- tropical and equatorial regions;
- heavy-duty commercial applications;
- armoured vehicles operating under significantly increased drivetrain loads.
Long-term field operation has allowed the design to be continuously refined based on real operating conditions.
Repair Philosophy
Our repair kits are based on actual repair requirements rather than generic parts lists.
A typical professional overhaul includes:
- reinforced Torsen differential (when required);
- drive chain;
- bearing set;
- oil seals.
We deliberately avoid including unnecessary components simply to increase kit cost.
At the same time, virtually every internal PL72T component is available separately. This allows each transfer case to be repaired according to its actual condition, including uncommon failures, accidental damage during disassembly or replacement of individual components.
Frequently Asked Questions
Are all Volkswagen Amarok transfer cases the same?
- No.
Volkswagen Amarok was equipped with two fundamentally different transfer case families: Part-Time 4WD and Permanent 4MOTION (PL72T). Their construction and internal components differ significantly, and their parts are generally not interchangeable.
Does the PL72T transfer case use a multi-plate clutch pack?
- No.
PL72T distributes torque through a mechanical Torsen centre differential rather than a multi-plate clutch pack.
Repair procedures and replacement parts associated with clutch packs are therefore not applicable to the PL72T transfer case.
Why do some repair kits mention clutch friction plates for PL72T?
- PL72T uses a mechanical Torsen centre differential rather than a multi-plate clutch pack.
Some online product descriptions incorrectly refer to clutch friction plates when describing PL72T repair kits. This terminology applies to different transfer case designs and should not be confused with the construction of the PL72T.
Can replacing the chain repair a worn Torsen differential?
- No.
The drive chain and the Torsen centre differential are separate assemblies.
Replacing the chain will not repair a worn differential. In practice, however, differential wear is frequently accompanied by chain wear, so both components are often replaced during the same overhaul.
Can I identify the transfer case by the vehicle model?
- No.
Always identify the transfer case using the OE number or identification plate located on the housing.
Transfer cases with OE numbers beginning with 0C7... and 0BU... belong to different transfer case families and require different replacement parts.
