[ElGracho]

The GM Gov Lok is a misunderstood piece by many people. It's not a locker at all and doesn't operate harshly. It's a clutch type posi unit that only actuates under a certain speed (around 30 mph but depends on tire size since the posi goes by ring gear rpm) (hence the gov or governor part of the name). They did this to prevent side slipping when a posi actuates with one tire on ice at highway speeds.

Just like other clutch type posi units, they do wear over time and lose the ability to hold torque. I've had a couple and had no problems with them. I talked to Randy's Ring and Pinion about them, they said the biggest problem with them was that when they failed, they tended to take out every other part in the differential. I think this is where they get their bad reputation.

GM still uses this design in their new trucks and even behind the Duramax so I don't think it can be all bad...