2014 Dodge Ram 1500 Whines

What causes tr Iansmission to whine in reverse

reverse is usually a lower gear than the forward gears. hence the whine

Manual transmission whining is due to the teeth on the reverse gear set being either straight cut or near straight. The forward gears are beveled more to eliminate whine; especially 3rd and up.

Automatic transmission then that is likely a rear axle whine.

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