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No diff tag, unfortunately. My mechanic said he called in the VIN to GM dealer and he said they told him it’s a super 70 which means it’s a 37 spline and that it has a 3.73 gear ratio. What’s odd is I can’t find any info online that says super 70’s have that gear. Everything indicates either...

I’ve got a 3500 Chevy express with a Dana Super 70. Im wanting to put an e locker in and I’m finding conflicting information as to whether the super 70’s even come with a 3.73 gear ratio or if they’re only 4.10 or 4.56. The reason being is because I’m trying to determine if I have to regear the...