First and Reverse Gear (Topshaft) Models 122, 130, 133, 135, 135 Petrol, 140, 145, 148, 150, 152, 155, 158, 165, 168, 175, 178, 184, 185, 188, 230, 233, 234, 235, 240, 245, 250, 253, 254, 255, 260, 335, 340, 342, 350, 352, 355, 360, 362, 365, 372, 374, 375, 382, 383, 384, 387, 390, 390T, 393, 396, 397, 398, 399, 4215, 4220, 4225, 4235, 4240, 4245, 4255, 4260, 4265, 4270, 4315, 4320, 4325, 4335, 4345, 4355, 4360, 4365, 4370, 550, 560, 565, 575, 590, 595, 670, 675, 690, 698, 698T, 699