205 Turbo 16(Edit)
Full-time all wheel drive. Viscous coupling locking planetary gear center differential (2). Automatically locking rear differential (3).


Figure: 205 Turbo 16 viscous coupling (2) locking planetary gear center differential (1)

Peugeot commercial vehicles 4x4 conversion is performed by Automobile Dangel. Peugeot itself does not produce 4x4 vehicles.
More information: http://www.4wdonline.com/Dangel/Dangel.html
Figure: Peugeot Boxer Dangel 4x4 conversion

Partner(Edit)
"More sophisticated, the single differential of the front wheel drive Peugeot Partner (right) is replaced by two differentials - (i) the lockable (verrouillable) "centre" diff' which drives the bevel gear to the rear wheels from one output and (ii) the diff' for the front wheels from the other output. In a very neat piece of engineering the two differentials are co-axial. Low-ratio gears are 1.72:1. The Partner has a 1761cc petrol or a 1868cc diesel engine." (Source: http://www.4wdonline.com/Dangel/Dangel.html)
Figure: Peugeot Partner / Citroen Berlingo 4x4 Dangel conversion


Peugeot (Dangel) Boxer(Edit)
"Dangel's simplest conversion method for a front-wheel drive, transverse-engined vehicle, uses a bevel gear to tap drive from the gearbox output, turn it through 90� and take it towards the rear wheels. Dual-range gears (1:1 & 1.5:1) are also incorporated. This method is used in the Peugeot Boxer `le tout-chemin' van (left). A visco-coupleur (doesn't French sound sensuous) automatically distributes torque to the rear axle where a lockable differential is fitted (and de Dion rear suspension)." (Source: http://www.4wdonline.com/Dangel/Dangel.html)
Figure: Peugeot (Dangel) Boxer

Peugeot (Dangel) Boxer High Mobility 3(Edit)
"For a heavier duty application, the Peugeot Boxer High Mobility HM3 (Haute Mobilite, below left), the original transmission is entirely discarded. The engine remains in its original transverse mounting but a bevel gear and shaft take the drive rear-wards from the clutch output. A new transmission is mounted in the centre of the van and drives the front wheels (with independent suspension) and the rear wheels (with a live axle) by propeller shafts. The gearbox is a very neat, flat unit and houses a 5-speed gearbox, high-ratio (1:1?) and low-ratio (2.1:1) reduction gears, and a lockable centre center → differential. A dozen other applications for this neat box spring immediately to mind." (Source: http://www.4wdonline.com/Dangel/Dangel.html)
Figure: Peugeot (Dangel) Boxer High Mobility 3

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