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Axles and Diff

3324 Views 16 Replies 5 Participants Last post by  Ivory15Cat
So I won’t bore you with how I got to this point (drag radials and a heavy car) but my axles and diff need replacing. The car is a 2016 Challenger Hellcat. The car is for the most part stock with the exception of DSS DS and CAI. The car has 3.09 diff but as stated it’s done. I plan on 2.85 upper at some point.
Looking for recommendations on replacements. I was thinking aftermarket axles and a new 3.09. I’ve read that the new diffs are a bit beefier. I do have a DIRS brace but it got here a little too late I guess.
Another option is to order Demon/Red Eye axles and diff. Will these axles work on non wide body? I believe I read that the spline count is different from hellcats but if I’m ordering diff and axles there shouldn’t be and issue?
What would you guys recommend?
I realize there’s a lot of “I think/believe” in my post but I’m getting older and is hard for me to remember these days. Lol
Thanks in advance for any advice.
1 - 5 of 17 Posts
Why not just get DSS axles? And a stock rear? With the brace and possibly an AAD rear suspension upgrade to square it all up, I would think you should be plenty fine
You try changing the oil in it? Sometimes that quiets them down. Guys have luck with a Amsoil oil and 1/2 bottle of Mopar Friction modifier.
I am an Amsoil Dealer and about to run the severe gear in the rear with no additives.
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I’ve changed the diff oil every year to be safe. This time there’s metal in the oil. Not sure if it’s the diff or from the axles splines taking a beating so I’ll be changing both.
If you open the pumpkin up you will be able to see what is chewed up. My guess when you do the spider gear will be missing teeth and they will be laying in the bottom of the diff.
I would open up the diff and see what is really causing your problems. If there were no chunks on the magnet then I think you really need to remove the diff cover and take a look inside.
Side note, I would guess there is a second magnet inside the diff too. I know my newer truck has 2, one on the plug and one on the bottom of the diff inside
1 - 5 of 17 Posts
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