I spot them chickens never slippin like a transmission

from Tech N9ne – Dwamn Lyrics on Rap Genius

Meaning

A transmission is a very complex and technical thing.
When it slips it means the transmission doesn’t propel the car like it should, sometimes the engine will turn, in gear, and not propel the car forward.

As you can see how a transmission looks like:

There are various types of transmissions for various things.

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