2025 GT PP 6sp transmission rattle.

[NegativeMultiplier]

I had no idea Euro spec PP didn’t have the Toresen diff.

It's at least part of the reason why the Euro spec feels like it has less get-up-and-go. I think it might be an emissions-related modification.

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[AZ_Ryan]

It's at least part of the reason why the Euro spec feels like it has less get-up-and-go. I think it might be an emissions-related modification.

Aren't they tuned down too?

 

[Cz_Ziemniak]

Personally.... I'd much rather have a clutch style LSD. Especially on a race track.

I've heard that the guys who were seriously racing the Trac-loc diffs had to replace the clutch packs pretty much every weekend before switching to the Torsen.

Torsens seem to make the most sense for hard driving

 

[NegativeMultiplier]

Aren't they tuned down too?

They are, unfortunately...

 

[Gregs24]

It's at least part of the reason why the Euro spec feels like it has less get-up-and-go. I think it might be an emissions-related modification.

Aren't they tuned down too?

They are slightly lower power output here, but on the dyno it seems it is all in the last 1000rpm (they are the same up to that point). Not sure the LSD would make any difference.

 

[Garcia172]

I've heard that the guys who were seriously racing the Trac-loc diffs had to replace the clutch packs pretty much every weekend before switching to the Torsen.

Torsens seem to make the most sense for hard driving

Never used a trac-loc LSD in a racing environment so I can't comment on that specific clutch type lsd. I've used the factory Porsche and more specifically the Guard assemetrical clutch type lsd (my favorite and definitely faster around a track than a torsion LSD). I think I used the guard LSD for about 5 years on the racetrack with zero maintenance. In fact, that same differential was used in probably four or five different transmissions that I managed to destroy on the track (unrelated to driving style).

I could be wrong but I can't imagine it Ford would build a limited differential that would only last a weekend on a racetrack. If that's the case I would probably look to the setup being incorrect because there must be a whole lot of wheel spin and if that's the case then you definitely have a setup problem. A lot of wheel spin with slicks in about one lap and you'll have everybody passing you (you'll be a sitting duck) and you'll be lucky not to finish the race in last place... With much slower class cars passing you. Been there done that.

And the only reason a clutch pack would wear is because of a difference in wheel speed and if the tires aren't slipping/spinning without traction... There really isn't much difference than street use.... And it pretty much would mean that the clutch pack LSDs in the mustangs that don't have the torsion LSD are going to wear out really really fast from street use.

Anyway in short I think it really becomes a theoretical issue rather than an actual issue since these are street cars, not race cars (far from it) that might see a few days a year for spirited driving on a racetrack.

Just my .02

 

[Cz_Ziemniak]

Never used a trac-loc LSD so I can't comment on that specific clutch type lsd. I've used the factory Porsche and more specifically the Guard assemetrical clutch type lsd (my favorite and definitely faster around a track than a torsion LSD). I think I used the guard LSD for about 5 years on the racetrack with zero maintenance. In fact, that same differential was used in probably four or five different transmissions that I managed to destroy on the track (unrelated to driving style).

I could be wrong but I can't imagine it Ford would build a limited differential that would only last a weekend on a racetrack. If that's the case I would probably look to the setup being incorrect because there must be a whole lot of wheel spin and if that's the case then you definitely have a setup problem. A lot of wheel spin with slicks in about one lap and you'll have everybody passing you (you'll be a sitting duck) and you'll be lucky not to finish the race in last place... With much slower class cars passing you. Been there done that.

And the only reason a clutch pack would wear is because of a difference in wheel speed and if the tires aren't slipping/spinning without traction... There really isn't much difference than street use.... And it pretty much would mean that the clutch pack LSDs in the mustangs that don't have the torsion LSD are going to wear out really really fast from street use.

Anyway in short I think it really becomes a theoretical issue rather than an actual issue since these are street cars, not race cars (far from it) that might see a few days a year for spirited driving on a racetrack.

Just my .02

If you have an S650 without the performance pack, then you've got a trac-loc.

I should probably elaborate that these were modified S197's that were on very very wide wheels doing a lot of hard cornering. There is far more strain on a diff when its dealing with such wide and sticky tires, constantly slipping those clutches mid corner, generating so much heat.

I'm sure a less aggressive setup wouldn't wear as aggressively, of course I know plenty of people who run road courses on their trac-locs who don't have the same issues, but they're also not running 315's in the rear on hoosiers. The biggest hurdle was heat, if I remember correctly.

Again, apparently these issues went away with the Torsen. Less things to wear, better setup for transferring power under hard cornering.

 

[Cz_Ziemniak]

Just googled, it was Vorshlag.

https://vorshlag-store.com/

 

[AZ_Ryan]

They are slightly lower power output here, but on the dyno it seems it is all in the last 1000rpm (they are the same up to that point). Not sure the LSD would make any difference.

Torsen is just another kind of limited slip diff. Torsens use gears while standard limited slips use clutch packs. It's not anything that would effect engine output or dyno numbers. Torsens are more durable on the track is all.

For what its worth, Google says Euro spec GTs have 40 less HP (448). Probably not that noticeable unless you are racing.

 

[AZ_Ryan]

Double post

 

[LouG]

It's at least part of the reason why the Euro spec feels like it has less get-up-and-go. I think it might be an emissions-related modification.

50 ponies less than ours.

 

[LouG]

There's some mechanical design magic in a Torsen that I've never been able to figure out.
But the name refers to Torque Sensing.

 

[Tomi.86]

The sound might be from the torque converter.

 

[Gr8ful]

6 speed

 

[Tripower]

I see why ford offers that big B&O sound system . Crank it up and use track setting on exhaust and all clicks, ticks, chirps, rattles just go away.

LOL - When I was younger and complained about various squeaks & rattles in my various cars, my Dad would always say "turn the radio up and you won't hear them anymore".

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