What Is RENK AG? The Transmission Company Behind the Leopard 2 — and Turkey’s Altay Problem

RENK AG is Germany’s Augsburg-based transmission manufacturer and the invisible backbone of NATO’s armoured vehicle fleets. It produces the transmissions for the Leopard 2, Boxer and Lynx KF41 — and sits at the centre of Turkey’s Altay MBT programme’s most sensitive technology transfer dispute. As a wholly owned Rheinmetall subsidiary, RENK is the de facto monopoly supplier of Western military vehicle transmissions.

Company Identity

Full Name	RENK AG
Headquarters	Augsburg, Germany
Founded	1873
Parent	Rheinmetall AG (100% subsidiary)
Specialisation	Military vehicle transmissions, naval propulsion

Key Products

HSWL 295TM	Leopard 2 family — NATO’s standard tank transmission
HSWL 256B	Lynx KF41 transmission
EGS	Boxer MRAV electro-hydraulic transmission
LSG 3000	Compact unit for Puma IFV
Naval Systems	Frigate and submarine propulsion gearboxes

The Altay Connection

Turkey’s Altay MBT targeted the RENK HSWL 295TM transmission — the same unit fitted to Leopard 2. The technology transfer broke down multiple times: German export restrictions tightened after Turkey’s S-400 acquisition; Turkey then launched a domestic transmission programme (ROKETSAN/BMC). As of 2024, whether the series-production Altay uses a domestic or RENK transmission remains unresolved. The episode illustrates why transmission dependency is a strategic vulnerability for any armoured programme.