CLASS 142 DIESEL MULTIPLE UNIT PACK 2.0 - LEYLAND TL11 ENGINE & SELF-CHANGING GEARS Some of you may not know (we didn't until recently!), that class 142s came off the production line with a completely different engine and transmission system than what they finished their career with. Originally, 142s were fitted with the Leyland TL11 engine and a self-changing gearbox. This resulted in a similar experience to a 1st generation DMU where the engine revved up through 4 gears to gain speed. The main