Reconditioned Ford C-Max 1.6 TDCi Gearbox

4 engine codes for the 1.6 TDCi: two gearbox families that don't cross over

Across the 2003–2019 range covered by this engine, the Ford C-Max 1.6 TDCi was fitted with two distinct manual gearbox architectures: a 5-speed and a 6-speed. The choice between the two doesn't depend on the year alone: it's the engine code — G8DA, HHDA, T1DA or T3DA — that determines which gearbox family the vehicle was built with. Mixing up the two families means ordering an incompatible part, even if the engine capacity and quoted power output appear identical.

When to opt for rebuilding your own gearbox

Rebuilding the original gearbox makes sense in two specific situations: when the exact reference stamped on the casing is rare or difficult to source on an exchange basis, or when the gearbox has suffered localised damage (synchro, bearing, differential) without general damage to the casing. On the more recent variants — codes T1DA and T3DA — the availability of parts is more limited than on the G8DA or HHDA versions; rebuilding can therefore be the most straightforward route to finding exactly the original reference.

Identifying the correct reference before ordering

OEM references such as 6M5R-7002-YC or AV6R-7002-KK illustrate the gap between series: the prefix changes with the gearbox generation, and two vehicles with the same engine produced a few years apart may carry references with no parts in common. Cross-referencing the engine code with the reference stamped on the casing remains the only reliable check before placing any order.