[Deep Purple]

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.
Steve

 

[Blkout]

Go with the Redeye axles and diff. It will fit.

 

[16GoManGoHC]

Spline count difference is only in the center shafts of the axles into the different CV’s used in the Demon/RE axles, the spline count and size of the splines that go into the Diff and wheel hubs are the same on all, yes they will fit.

 

[Ivory15Cat]

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

 

[16GoManGoHC]

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

I’m not a fan of DSS Axles, gone through 2 sets of them already. If your going to spend big bucks on axles spend a bit more and get GForce Outlaw axles or find RE take offs. If they can take the shock load of a Demon pulling the front wheels off the ground they’ll take most anything you can hook them with on the street and most likely the track too unless you have a 15” conversion and making 1100+ wheel.
But I agree on a good diff brace and AAD suspension goodies.

 

[Blkout]

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

Going to be honest, I know quite a few people that have broken/damaged DSS axles with far less than the rated 1400hp, but its almost unheard of to break a Redeye axle. The AAD suspension is a nice to have but not necessary, and the diff brace should be strongly considered.

 

[Deep Purple]

I’ve heard some negative feed back about the DSS axles and was told to go with G Force outlaws. I figured since my plans for the car are not extreme that the Demon/RE axles might be enough. I have no interest in putting a cage in the car and don’t really want to deal with race fuel. I figure low 10s is what I’m shooting for.

The diff brace is on what I have so I’ll be putting that on the new diff. The 3.09 that’s in the car has been whining since about a year after it was installed.

Thanks for the replies

 

[16GoManGoHC]

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.

 

[Blkout]

Every diff I had in a Hellcat whined, 2.62 or 3.09.

 

[Ivory15Cat]

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.

 

[Deep Purple]

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.

 

[usmc1488]

Good Morning guys!!! This is why I didn’t go with drag radials when I purchased the factory rep 20x11s. Too scared I’m going to start braking stuff!

 

[Ivory15Cat]

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.

 

[16GoManGoHC]

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.

Actual metal bits or metallic film on the drain plug magnet?

 

[Deep Purple]

No chunks to speak of but more metal than I’m used to seeing.

 

[Ivory15Cat]

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.

 

[Ivory15Cat]

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