Diff List

[fastmopar]

Is there a definitive list of available differentials and half shafts for the R/T's (05-08)?

I am aware that the stock diff and axles are the a=weak point in the drive train. I'm trying to get educated so when it breaks I at least know what's available and where to get the replacement.

Thanks,

fastmopar

[1fastsedan]

Is there a definitive list of available differentials and half shafts for the R/T's (05-08)?

I am aware that the stock diff and axles are the a=weak point in the drive train. I'm trying to get educated so when it breaks I at least know what's available and where to get the replacement.

Thanks,

fastmopar

That list is pretty short:
1) Quaife LSD and high HP axles from DSS
2) 09 Getrag diff with 09 axles/hubs
3) Builder Bill's modified Ford 8.8 rear with the axles he makes for it.

[RobAGD]

In the RT's they have held up well, way better then the SRT parts to date.

Almost all the of Axle failures were from Spin grab issues.

We have had a few odd ball diff failures ( PAChargers comes screaming to mind ) and Big Daves

Unless you are making some serious power or power adder then you should be ok as long as you are not dead launching the car on a TC.

-R

[fastmopar]

Just heard a lot of stories about snapped axles and spun diff's.

If the gears weren't off (3.06 vs 253's ?) in the SRT rear that would be a good swap into an R/T I guess.

fastmopar

[Super T]

That list is pretty short:
1) Quaife LSD and high HP axles from DSS
2) 09 Getrag diff with 09 axles/hubs
3) Builder Bill's modified Ford 8.8 rear with the axles he makes for it.

There are other shops making axles for the stock carrier, be it Quaife or the stock diff. The Dana 44 works w/ a custom cover and axles as well (little more spendy).

[Cam]

Just heard a lot of stories about snapped axles and spun diff's.

If the gears weren't off (3.06 vs 253's ?) in the SRT rear that would be a good swap into an R/T I guess.

fastmopar

Only problem is the SRT halfshafts are crap. The RT's are actually stronger. I have the SRT rear right now. The gear change was very noticeable. But I won't track it without upgraded axles. I also have a builder bill 8.8 with a 3.23 sitting here waiting to go in. This will be interesting.

[wbglider]

With the 392 stroker going in my ride with DR's, looks like I need to get upgraded half shafts first on my SRT. It should be putting down about 500 HP & TQ to the wheels... what would you guys suggest?

[PowerWagon896]

Only problem is the SRT halfshafts are crap. The RT's are actually stronger. I have the SRT rear right now. The gear change was very noticeable. But I won't track it without upgraded axles. I also have a builder bill 8.8 with a 3.23 sitting here waiting to go in. This will be interesting.

The R/T axles are subjected to 9% less TQ multiplication W/the 2.82 ratio compared to the 3.06. They don't need to be as strong to appear stronger.

Example:

400# engine TQ multiplied by the 3.58 1st gear ratio X the 2.82 axle ratio = 4,038# TQ load on an R/T axle.

Same 400# engine TQ X 1st gear ratio X 3.06 = 4,382# TQ load on the axle.

344# more TQ load from the same engine TQ.

When we start seeing the 3.55 or perhaps 3.23 axle ratios being swapped into the 210mm diffs I think they are going to snap axles like pretzels. We will then be seeing 26% & 15% more TQ multiplication respectively.

I could be wrong, but I'd be willing to bet money on it.

I also think that the lowered SRT suspensions might be a factor, but that's just a hunch.

[Cam]

Dan, I broke one. The hardening goes much deeper into the material than the 6.1. A full 1/8"+ as a matter of fact. It's that simple.

[BuilderBill]

Only problem is the SRT halfshafts are crap. The RT's are actually stronger. I have the SRT rear right now. The gear change was very noticeable. But I won't track it without upgraded axles. I also have a builder bill 8.8 with a 3.23 sitting here waiting to go in. This will be interesting.

Very Interesting.
I know you will do your best and try to snap the 300m axles!
Bill

[Cam]

Very Interesting.
I know you will do your best and try to snap the 300m axles!
Bill

Hell yes I will. It just so happens that a set of 28" tall DR's made it here to day. Let the carnage begin!!.

[slideway]

Hell yes I will. It just so happens that a set of 28" tall DR's made it here to day. Let the carnage begin!!.

If you want to test the axle's strenth use your little DR's Cam

[fastmopar]

This is interesting. You are putting 300M (LH front drive) half shafts on the rear of the LX's because they are stronger?

Please clarify.

Thanks,

fastmopar

[PowerWagon896]

If you want to test the axle's strenth use your little DR's Cam

How can that be?

The smaller drag Radials do not change the amount of TQ that is being applied to the axles.

They allow better acceleration due to the fact that they offer LESS resistance upstream thus allowing better acceleration just like going W/more gear reduction.

[Adanac Charger]

This is interesting. You are putting 300M (LH front drive) half shafts on the rear of the LX's because they are stronger?

Please clarify.

Thanks,

fastmopar

http://www.azom.com/Details.asp?ArticleID=4370