Rippa's Ram
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What is the easiest way to tell which rear differential I have? 21 1500 Bighorn 5.7 Etorque
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Rear differential
- Thread starter Rippa's Ram
- Start date
CHeYeNNe71
Spends too much time on here
rick619
Well-Known Member
Agree with this, lookup your sticker. I always find and download my sticker the day I buy it, good for a reference later. Some MFG's remove that info after a few years. So save it while you can.
Likely easy to guess. It's an option on Bighorn, but I'd say unlikely unless you have other packages (towing) that would suggest you have it.
2025s are weird, for some reason. They do not work with that tool. Try this guy's tool. Works nicely for most.
Although I feel the build tools above are easier, if you have a 4x4, you can also look at the tag on the back, bottom side of the front differential. The rear tag is probably wiped/unreadable by now, being a 2021, but that front tag is protected a lot better and usually still legible. I know on my previous Rams, the rear tag was usually illegible after only a couple years, but the front tag persevered for many.
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