ASE Automobile and Light Truck Certification Manual Transmission (A3) Practice Test

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In a gear setup, what does the "+2" marking signify?

Depth shim reference number

Gear setting number

Preload setting number

The "+2" marking in a gear setup typically signifies a preload setting number, indicating the amount of initial load being applied to the bearings or gears before any operational load is put on the system. Preload is crucial for ensuring that there is proper contact between the gear teeth, which helps manage wear, reduces noise, and maintains the alignment of the gears under operational conditions.

By establishing a specific preload, the manufacturer ensures that the gears mesh correctly during operation, contributing to the longevity and proper functioning of the transmission assembly. A preload setting that is too low could lead to excessive wear or backlash, while too much preload could result in increased friction and overheating. Understanding the significance of the preload setting is vital for technicians dealing with gear setups in manual transmission systems.

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