PSK 3037 - Gearbox Tunnel, Type 1 Land-Rover Series 2 and 3 £41.70 Quantity: at £41.70 each Out of Stock Out of stock. Gearbox Tunnel, Type 1 Early type of Gearbox Tunnel without the access hole to bleed the Clutch Slave Cylinder. Also used on mid-production Series 3, 4-cylinder bulkheads. Fitted to: Series 2/2a, 4-cylinder, Type 1 only. Series 3, 4-cylinder, Type 2 and Type 3.