[1Bad62Pro/Street]

There should be a tag on there showing the gear ratio. The rear ends have stamped ID's as well.


Raise and support the rear of the truck with jack stands.
Read the metal tag attached to one of the differential cover bolts.
This tag, which is always present (if not removed by a previous owner), will indicate the gear ratio that came with the vehicle originally.
This tag may not be valid if the previous owner has changed the ratio, and you will have to remove the cover to find the gear ratio.