Draw the powerflow from input through first gear - The power should come in via input shaft, then transmit through engaged 1st gear, then proceed to output shaft., If the layshaft gear has 54 teeth and the corresponding gear has 63 teeth what is ratio? - Driven over driver, so driven gear has 54 teeth, divided by driver gear 63. 54÷63 =0.857, so ratio would be 0.857:1 , Which of these gears is underdrive? a1.112:1 b0.952:1 - the input is first number so if engine revolves 1 revolution and the wheels turn less than engine speed, it is underdrive so a is correct., What type of gears are these a spur, b straight, c helical, d herringbone? - The gears shown are c helical. If you imagine the gear as a cylinder the cut would wrap around cylinder like a thread., What is the name and purpose of the component being fitted in image? - The item is a detent, it's purpose is to hold selected gear (to detain)., Why is the component fitted to a transmission, how does it work. - The image is an interlock, it stops more than one gear being selected at one time, it does this by locking out other gears, in this case by pin locking two rods.with ball & plunger , Which image A or B is correct on a RWD car, and how do you tell? - The correct answer is B, it uses bevel gears, and is mounted sideways as the RWD differential has to turn drive 90º, Identify item in image, why do the phosphorous bronze parts have grooves cut in them? - The item is a Synchro-hub, it matches gear speed, the phosphorous bronze parts have grooves to cut through lubricating oil., How would you identify the reverse gear in a manually operated gearbox, give two identifiers. - In a manual gear box the reverse gear is i. always a straight cut gear, ii. it also has a idler gear.,

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