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Ford had Torsen design to a more severe duty level than they did for their own clutch pack diff. So, its the heavy-duty part to the Traction-Lok's standard duty, at least in the case of the S550 application. Torsen also sells an even heavier-duty model as well.

The aluminum carrier probably sheds heat a lot more readily than the iron one does. Combine that with the exhaust wrap, and maybe you've found a happy place...

I've thought the same thing, at least regarding the New-Edge - S550 connection. The funny thing about how styles age is that our view of them changes with time. I remember that when the SN95 replaced the Fox body, I thought it was amazing. So much newer than the old car (probably bolstered...

I could buy into that idea, especially if the pilot is bushed instead of a bearing. Either way, I think that's what is transferring drag torque into the input shaft. If someone found a way to relieve that, the "thud" would probably disappear...

We've qualified differentials with minispare tires, sometimes as much as 25% smaller than the normal tires. That will build heat in the axle, as the differential is forced to differentiate under load and is generating friction all the time. But that's part why the tires have speed and distance...

Possibly. But I'm not talking about a significant drag in terms of wear life or preventing gear engagement, just a very slight contact, as if the nominal clearance is set up so the faces just kiss, with no real pressure on the surface. That would be all it takes. Obviously, a great many other...

The issue with 4x4s can be more complicated then that, but at the end of the day, if your car's comes with a mini spare, follow the manual's guidelines for usage. Putting the spare on the front is probably safer from a driveline point of view, but is necessarily necessary, depending on...

I've stated this in the other thud thread, but my theory is that the root cause of the thud is in the clutch. The noise eminates from the driveline and movement within the backlash, but the root of the issue probably starts with the clutch. Here goes: there is (may be) a small amount of...

What kills clutch-pack LSDs is forcing them to differentiate fast for a period of time. So, where this issue comes into play is, as BmacIL said, is if you have a different diameter tire left to right. If they're both the same size, but bigger or wider, the diff won't really know or care. A...

We're talking about axle cooling, which has implications beyond just the GT. Do you think that nothing discussed here is of interest to the owner of a GT350? Anyway, as noted, it never hurts to keep things in perspective. The point being that if a someone does, in fact, add a cooler, that...

FWIW, at least for the GT350 guys - a conversation I had a few weeks back with a colleague at Ford Performance suggested that cars with the OEM axle cooler needed the factory 75W85. He said the cooler didn't flow well enough for 75W140. Since this came from someone involved with testing the...

The stock one is aluminum or iron, depending on transmission (automatic or manual). The link you posted states that. It looks like someone has tooled up a replacement / upgrade aluminum carrier that improves on the stock aluminum carrier. There is nothing on that page to indicate that its...

I know this falls on deaf ears, but Ford has little incentive to release more info early. Sure, its a hassle to the guys that are waiting to order a car, but frankly, in the grand scheme of things the actual HP number will have little influence on purchasing decisions collectively. OTOH...

You've got the Traction Lok, the OEM Torsen, Wavetrac and (my understanding) an aftermarket Torsen HD soon to come. I haven't heard on any other products as of yet, but I'm sure they'll come.

Yeah, unfortunately, Ford is rampant with part numbers. First, there is the production part number (probably starts with CR3W for some of these), then there is a different number for service parts (the CR3Z), then on top of that Ford Racing/Performance assigns their own number (M-etc). Some of...

I'm not really sure what you're on about, your post is a bit hard to read. All I am saying is that the Super 8.8 and the old 8.8 are different, gears not interchangeable. Sounds like we're in agreement there. I never said that the same gears can go in each. And both the old 8.8 and the Super...

Which part is crazy? Both the old 8.8 and the new Super 8.8 have solid axle and IRS versions, so that isn't a useful delineator. And, FWIW, the ring & pinion gearing really don't care what the axle shafts look like, that has no bearing on the gearing itself. The same gear sets go into both...

As far as I can tell, the old 8.8 - as a rear axle - is obsolete and no longer in production. All of the vehicles that used the 8.8 are gone, except for Mustang and F-150 which have moved on. I understand that even some of the Transit models may use the Super 8.8 as well. That said, the...

The Super 8.8 has a lot of differences compared to the old 8.8 gear sets. The ring bolt pattern is different, though I believe that the pitch diameter of the gear is about the same. But probably more importantly, the pinion is beefier and takes a bigger bearing. So, the gear sets do not...

Interesting that they put a red interior in a blue car. Is that actually a production combination?