Torsen only comes with PP.

[TicTocTach]

Not sure if this is helpful, but my '18 EBPP A10 has an iron diff, 3.55, and Torsen.

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[whatsup62]

To be honest for what I use my car for and my future goals I would rather have a Trac-Loc vs the Torsen but would rather have a iron diff vs the aluminum. Maybe one day I can switch housings when I am making real power. Just sucks because that is going to be expensive and/or time consuming.

if its for straight lining the Torsen is stronger.

 

[Zinc03svt]

PP is a win imo. Great hardware for the $ spent.

 

[Furiosa GT]

if its for straight lining the Torsen is stronger.

Then something has changed with it since the last GT500. Guys were blowing Torsens up at the dragstrip with Torsen equipped cars but GT500 equipped with the Trac-loc were in the 9's completely stock rear end. That's saying something considering the serious low end of the GT500 and driveline shock since all those cars are manual trans.

 

[whatsup62]

Yep..the Super 8.8 is different...torsen getting it done. With that said i havent heard much on any 2015+ center sections failing.

 

[Furiosa GT]

Yep..the Super 8.8 is different...torsen getting it done. With that said i havent heard much on any 2015+ center sections failing.

Here is one instance I remember.
https://www.svtperformance.com/thre...nual-trans-cars-broken-aluminum-diff.1088208/

 

[whatsup62]

Yeah...that wasnt the internals...that was the Aluminum housing. The autos (15-17 anyway) came with Aluminum housings and stick cars had the steel casing. The Aluminum ones wont handle high hp on a dragstrip launching hard.

 

[Furiosa GT]

That was the main reason I wanted a iron housing in the first place cause I remembered the BMR car doing that. Of course it will be a while before I'm making that kind of power and especially those kind of 60fts.

 

[millwerks]

To be honest for what I use my car for and my future goals I would rather have a Trac-Loc vs the Torsen but would rather have a iron diff vs the aluminum. Maybe one day I can switch housings when I am making real power. Just sucks because that is going to be expensive and/or time consuming.

You can get a loaded differential for under a grand and swapping them out only takes about 3 hours. As stated above if your just wanting to drag race torsen isnt your best option.

 

[MRGTX]

When are folks finding that the standard clutch pack style diff is letting them down?
Are they at a major disadvantage on the autocross course?

 

[TeeLew]

When I bought my 2018 base model GT MT-82, it has an iron housing, and my sales slip said it had 3.55 gears and a "limited slip differential".

Is it a clutch pack type? I thought all limited slips on manuals with 3.55 were Torsens?

I bet that's a Trac - Loc diff.

 

[TeeLew]

When are folks finding that the standard clutch pack style diff is letting them down?
Are they at a major disadvantage on the autocross course?

If built properly, they're probably OK. They just wear too fast when stock.

 

[MRGTX]

If built properly, they're probably OK. They just wear too fast when stock.

That’s what I gathered but do people really get stuck needing a rebuild? what’s the typical interval for an enthusiastically driven car?

 

[TeeLew]

That’s what I gathered but do people really get stuck needing a rebuild? what’s the typical interval for an enthusiastically driven car?

What happens is the friction material wears off the plates and you lose preload. Once you get enough plate wear, the thing will lose enough locking ability that it's essentially an open. It doesn't take long.

I did see a guy that would remove *all* the friction material off the plates and then add in extra plates to achieve the same clutch pack stack height. Adding plates adds locking ability, so that's a positive. By removing the friction material off the plates, you end up running the plates steel-on-steel, which reduces the wear issue significantly. This is how every racing differential is built. The negative to this is that it is noisier in low speed corners and will tend to scrub a little bit if you're driving around a parking lot.

 

[Elp_jc]

I wasn't aware the diff is steel. I won't abuse my Bullitt, so that means the 3.73 Torsen should last until the end of days, right? How much heavier is a steel vs aluminum diff? But guess the diff is not where you want to save a few dozen pounds, no? And yes, will change the fluid early, to get all the assembly and break-in crap out of there. Thx.

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