Differential swap

**dejuan71** · 02-15-2012, 12:54 AM

I might try it out if i can find one...im adding that and a stall..over the summer.

**dejuan71** · 02-15-2012, 12:55 AM

so if i got the 5 speed can i just order the 3.64 gears

**RogueSE** · 02-15-2012, 06:57 AM

Yes you can, but from a dealer this can be very expensive. I think that you could check you local bone yard to see if they have any low mileage 300's or Magnums. These cars when equipped with 2.7L v-6 came from the factory with 3.64's and in my opinion this is the way to go, unless of course you don't mind spending your money on a new carrier. Good Luck!

**PRPLHAZE** · 02-15-2012, 07:27 AM

Check out Car-Part.com--Used Auto Parts Market nationwide database of junk yards. 2.7's came with 3.92 gears which were available(double the price, but still not a bad deal) but we thought it would be too steep. Some 3.5 lx's came with 3.64. I used to have a 2007 sxt charger and it had the 2.87's. Make Sure ratio printed on the diff is correct. When I went to the yard the first one they pulled was a 2.87. Their part guy didn't check before he pulled it and wasted his time. Oh well. Check the seals as well. But they can be replaced for cheap from a dealer.

Car-Part.com--Used Auto Parts Market

**Richmonddjs** · 02-15-2012, 10:32 AM

Originally Posted by dejuan71

so if i got the 5 speed can i just order the 3.64 gears

its best to do what Purple did. Just go to the junkyard and get the whole differential. It's a quick R&R. Make sure the tag in the pic he posted is the same as what you get. It will have a barcode tag on it with that P part number and the gear ratio on the tag. Don't buy it if it doesn't have that tag. Then take your predator change the rear end gear or you will be in limp mode.

**dejuan71** · 02-15-2012, 11:17 AM

Cool thanks

**DaILLestWun** · 02-15-2012, 11:32 AM

I think I may just go with an SRT 3.06. But then it involves a lot more swapping out. Do you guys know if I then need to change the brakes as well to an SRT set up? Since the axles need to be changed I beleive the hubs do also.

**RogueSE** · 02-15-2012, 01:49 PM

Originally Posted by DaILLestWun

I think I may just go with an SRT 3.06. But then it involves a lot more swapping out. Do you guys know if I then need to change the brakes as well to an SRT set up? Since the axles need to be changed I beleive the hubs do also.

The SRT-8 rear is completely different, 215MM, as opposed to 198MM for the smaller V-6. The R/T's use a 210MM package. Usually when you do this kind of swap its hub to hub, so yes you will have to. Also the SRT's use bigger brembo brakes, and off set wheels to accommodate the massive calipers. You will have to take all this into consideration. Also the predator for the V-6 does not give a ratio option for 3.06 since they never came with this ratio, so this will also have be considered.

**ircp10** · 02-15-2012, 01:53 PM

Originally Posted by DaILLestWun

I think I may just go with an SRT 3.06. But then it involves a lot more swapping out. Do you guys know if I then need to change the brakes as well to an SRT set up? Since the axles need to be changed I beleive the hubs do also.

Driveshaft , the srt8's have a 4 tabs on the differential

**DaILLestWun** · 02-15-2012, 04:05 PM

Originally Posted by RogueSE

The SRT-8 rear is completely different, 215MM, as opposed to 198MM for the smaller V-6. The R/T's use a 210MM package. Usually when you do this kind of swap its hub to hub, so yes you will have to. Also the SRT's use bigger brembo brakes, and off set wheels to accommodate the massive calipers. You will have to take all this into consideration. Also the predator for the V-6 does not give a ratio option for 3.06 since they never came with this ratio, so this will also have be considered.

Well I'm considering eventually doing a 6.1 swap so I want to get a head start. But my question is, with the SRT hubs, can I still use the SXT rotors and calipers? Are the hubs also larger or something like that? I thought the only difference with both hubs is that the SRT are for 215mm axles and SXT for 198mm.

Originally Posted by ircp10

Driveshaft , the srt8's have a 4 tabs on the differential

Right, so aside from the Axles and possible the brakes as Rogue mentioned, I'd need the casing (Pumpkin) only right?

Man, this is looking more complicated.

**PRPLHAZE** · 02-15-2012, 04:59 PM

You do not need to change your brakes. Plenty of guys run an srt setup on an r/t and se/sxt. All hubs Will fit On all spindles. You need axles, rear half of srt driveshaft, and pumpkin. You do not need to change your hubs unless your diff is a getrag. (thats for r/t, im not 100 percent about the v6 hubs, i think they are all the same except for the getrag)If you buy a 3.06 open differential you just need axles, pumpkin and rear half of driveshaft and the coupler that goes along with it(4 bolt).You would need new hubs for a getrag. But you won't need a rear half of the driveshaft for the 09+ it is the same 3 bolt flange. A new 392 coupler is highly recommended(3 bolt)

Make sure if you buy the axles used they come with tone rings(functional) If not just buy new axles as new ones come with them.

Your best bet it to call a vendor. I've been doing a ton of research for my r/t and I do not want to give out bad info to the v6 crowd in regards to hubs and driveshaft. Once you confirm with a vendor then you could try and piece it together with used parts or buy all brand new.

**DaILLestWun** · 02-15-2012, 05:26 PM

Ok, that sounds better. And I can always contact DiabloSport to see if they can add a 3.06 option for me on the Predator.

**PRPLHAZE** · 02-15-2012, 05:51 PM

I think the predator has the option as awd had a 198mm 3.07. Best bet is to get a nice 3.64 or 3.92 198mm. Yeah LSD's are sweet but they are expensive even used. As for upgrading the axles unless you slap a blower on and run juice I don't think you'll snap an axle. You need a Ton of low end to snap an axle unless you race a lot and launch with slicks I don't think it will be an issue. Has anyone snapped a v6 axle? No disrespect intended it might not be worth the money.

**jonny** · 02-15-2012, 06:15 PM

I got my diff off ebay... $400 for the 215mm 3.06

I see the V6 ones quite often for a couple hundred. 3.64 and 3.9

**ircp10** · 02-15-2012, 06:19 PM

Originally Posted by PRPLHAZE

I think the predator has the option as awd had a 198mm 3.07. Best bet is to get a nice 3.64 or 3.92 198mm. Yeah LSD's are sweet but they are expensive even used. As for upgrading the axles unless you slap a blower on and run juice I don't think you'll snap an axle. You need a Ton of low end to snap an axle unless you race a lot and launch with slicks I don't think it will be an issue. Has anyone snapped a v6 axle? No disrespect intended it might not be worth the money.

you're right there is a 3.07 in the predator won't make a difference to the car which gear ratio it is( 3.06/3.07)as long as you use the 3.07 that's in the predator.
Now as far as disrespect ....

it's all good., Besides I'm running 11 lbs. of boost and a 50 shot at the track .... no issues yet, Traction however that's a different story