Reconditioned Volkswagen Transporter 2.4 D Gearbox

The 2.4 D in the Transporter T4: from 1990 to 2003, which engine code determines the compatible gearbox?

Throughout the entire 1990–2003 period, the Transporter T4 fitted with the 2.4 D came exclusively with a 5-speed manual gearbox — there is no automatic option available for this engine. The challenge when identifying the correct unit lies in the two engine codes found on this block: AAB and AJA, which do not necessarily cover the same gearbox variants or the same production years.

AAB and AJA: two codes for the same 2.4 D, but different fitment histories

The code AAB is the most common on early-production T4s; the code AJA appears on later vehicles. Before placing an order, it is essential to check the engine code stamped on the block — not just the engine capacity — as it is the engine code that determines which compatible gearbox reference to select from those listed on this page. A T4 2.4 D without a precise engine code identification can lead to ordering a gearbox whose flanges or shafts do not match.

Key points to watch with this engine

The 2.4 D is a naturally aspirated five-cylinder diesel: its torque output is moderate, but its working life in commercial use — heavy loads and frequent starts — places intensive demands on the gearbox synchronisers and bearings. Faults most commonly present as difficulty selecting first gear or reverse, or as bearing noise when cold. Two purchasing options are available: reconditioned on an exchange basis, or a rebuild using your own gearbox if you wish to retain your original reference.