G80 — Automatic locking rear differential. This code identifies a factory-installed axle feature. Browse RPO codes →
My build sheet lists G80 and I keep reading conflicting things about what it actually does. Some people call it a limited slip and others say it is a locker. On my 2013 the rear end will spin one wheel on wet grass sometimes, which makes me wonder if it is even working. What does G80 mean specifically?
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G80 is the automatic locking rear differential. It is not a traditional limited slip. It stays open until it senses a speed difference between the wheels, then it locks mechanically.
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That behavior you describe can be normal. It needs a real difference in wheel speed to trigger, so a slow slip on damp grass may not be enough to engage it.
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If it never engages under harder conditions, the unit may be worn. They do wear out. But one wheel briefly spinning before it catches is how it is supposed to work.
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That explains it, it does catch when I actually get into it. I was expecting it to act like a locked rear all the time.
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