eli5 why does the cars R gear sound so different to the 1st gear? you can always hear the different when a car is backing up.

Question

eli5 why does the cars R gear sound so different to the 1st gear? you can always hear the different when a car is backing up.

In: 20

Answer 1

Straight cut gears just make that noise due to the way they mesh. The helical gears are quieter and stronger because they stay meshed continuously. Helical gears are more expensive to produce, and since You don’t typically go far with reverse and strength in reverse is less important manufacturers choose to use the cheaper parts to save money.