How can you tell if a carrier is 2 series or 3? It's an Auburn unit from an '89 IROC.

 

What gear ratio did it come with? If it was above 3.08 from the factory than it's a 3-series carrier, 3.08 or below is a 2-series carrier. If it has aftermarket gears, you can't tell that way. Richmond I know makes all gears for either carrier.

Jason

 

The difference is the location of the ring gear flange. It you set it on end with the flange at the lower end, a 2-series one will have the flange about ¼" lower than a 3-series one. I don't know the exact dimensions though. If you can find a known ne to compare it to, it should be obvious.

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