3.55 Rear End 2018 GT PP1 A10 5.0 Torsen?

[Bald Menace]

all 2018 PP GT's come with the cast iron differential housing

Sponsored

 

[Cobra Jet]

My GT PP with MagneRide A10 has a black painted iron (per "magnet test") housing with torsen diff.

^^^ Same with my 2018 EB Prem. w/PP.

All 2018 iron rear diff cases are black (excluding the rear cover).

Also to note, all 2018 EB w/PP come with the Torsen rear and 3.55’s standard.

A dull grey bare metal rear diff case is aluminum.

Here is a pic of my 2018 EB rear diff, from the rear of the vehicle, showing present Ford part decal:

TIP:
- If the rear diff has Trac-loc guts, you won't be able to see through it with axles removed. There will be a "bar" in the hole which is for the spider gears.

- If the rear diff has Torsen guts, you'll be able to see through it with axles removed.

 

[Tim McCreary]

Can anyone tell me how to identify a Torsen versus non-Torsen rear assembly if it is removed from the car?

I have a 2015 Ecoboost Premium PP.

I am also looking at a 2018 and 2020 carrier assembly with 3.55 gears. I think there are non-Torsen and Torsen types for these years with this same gear ratio. I believe the ecoboost PP and The GT PP1 had the Torsen and the rest had the non-Torsen.

All the labels say 3L55.

Without knowing the VIN from the donor car, can anyone describe any physical characteristic identifier that does not require removing the cover?

I know the Ecoboost has an aluminum housing and the GT has an iron housing.

 

[Cobra Jet]

Can anyone tell me how to identify a Torsen versus non-Torsen rear assembly if it is removed from the car?

I have a 2015 Ecoboost Premium PP.

I am also looking at a 2018 and 2020 carrier assembly with 3.55 gears. I think there are non-Torsen and Torsen types for these years with this same gear ratio. I believe the ecoboost PP and The GT PP1 had the Torsen and the rest had the non-Torsen.

All the labels say 3L55.

Without knowing the VIN from the donor car, can anyone describe any physical characteristic identifier that does not require removing the cover?

I know the Ecoboost has an aluminum housing and the GT has an iron housing.

@Tim McCreary

The 2018-2019+ GT PP or EB PP’s all come with iron pumpkins and Torsen.

The 2018-2019+ iron case will be coated black with a cast aluminum rear cover. Also to note, the 2018-2019+ GT/EB PP rear covers will have the included threaded port for the rear axle temp sensor.

A) The 2018-19+ GT w/ MT82 came w/ Torsen and 3.73’s.

B) The 2018/19 GT or EB w/10R80 came w/ Torsen and 3.55’s.

---
TIP:
- If the rear diff has Trac-loc guts, you won't be able to see through it with axles removed. There will be a "bar" in the hole which is for the spider gears.

- If the rear diff has Torsen guts, you'll be able to see through it with axles removed.

---
and.... everything you ever wanted to know about a Torsen differential:
https://www.mustang6g.com/forums/th...d-slip-differential-work.110850/#post-3451290

 

[Tim McCreary]

TIP:
If the rear diff has Torsen guts, you won't be able to see through it with axles removed. If the rear diff has Trac-Loc guts, you'll be able to see through it with axles removed.

Thank you!! That was the answer I was looking for.

 

[skinnyb]

Definitely 10 auto has torsen on the PP cars. Mine does. 3.55 and torsen

 

[kz]

3.55 was an option - for all the non-PP cars - OP never mentioned whether he has a PP car.
My first S550 was non-PP manual GT with 3.55 rear end and Trac-loc diff.

Bottom line - having 3.55 gear does not always mean the LSD is a torsen.

 

[Jackson1320]

torsen does not mean better by the way. it just means that it's going to lock and unlock seamless but it is weaker. drag racing you do not want torsen. autocross you do.

 

[Zooks527]

3.55 was an option - for all the non-PP cars - OP never mentioned whether he has a PP car.

Very first line of the original post (from 4 years ago): "Is the 3.55 Rear End 2018 GT PP1 A10 5.0 a Torsen?"

 

[Howitzer]

@Tim McCreary

The 2018-2019+ GT PP or EB PP’s all come with iron pumpkins and Torsen.

The 2018-2019+ iron case will be coated black with a cast aluminum rear cover. Also to note, the 2018-2019+ GT/EB PP rear covers will have the included threaded port for the rear axle temp sensor.

A) The 2018-19+ GT w/ MT82 came w/ Torsen and 3.73’s.

B) The 2018/19 GT or EB w/10R80 came w/ Torsen and 3.55’s.

---
TIP:
If the rear diff has Torsen guts, you won't be able to see through it with axles removed. If the rear diff has Trac-Loc guts, you'll be able to see through it with axles removed.

---
and.... everything you ever wanted to know about a Torsen differential:
https://www.mustang6g.com/forums/th...d-slip-differential-work.110850/#post-3451290

Hey Cobra

Regarding your tip...Which one of these is the torsen? Is the one with the bar in the center the clutch type traction LOK and no bar is Torsen?

 

[Cobra Jet]

Hey Cobra

Regarding your tip...Which one of these is the torsen? Is the one with the bar in the center the clutch type traction LOK and no bar is Torsen?

Your 2nd image should be a Torsen diff.

TIP:
- If the rear diff has Trac-loc guts, you won't be able to see through it with axles removed. There will be a "bar" in the hole which is for the spider gears.

- If the rear diff has Torsen guts, you'll be able to see through it with axles removed.

---
and.... everything you ever wanted to know about a Torsen differential:
https://www.mustang6g.com/forums/th...d-slip-differential-work.110850/#post-3451290

 

[Howitzer]

Your 1st image should be a Torsen diff.

TIP:
If the rear diff has Torsen guts, you won't be able to see through it with axles removed. If the rear diff has Trac-Loc guts, you'll be able to see through it with axles removed.

---
and.... everything you ever wanted to know about a Torsen differential:
https://www.mustang6g.com/forums/th...d-slip-differential-work.110850/#post-3451290

That's where I'm getting confused then. I've seen a 3.15 aluminum diff housing that has that center bar. And that should have been a traction LOK. Are you sure it's not the other way around? The pics above are both from 3.55 carriers - I'm just trying to determine which is an actual torsen.

This is claimed to have been pulled from a 2015 GT automatic, which sounds right. You can see the center bar there.

edit:
And I did look through some of the documentation you had on the torsen units in that other thread, and it does look like you'd be able to see through the worm gears? I at least don't see any kind of center bar in the design docs. That center bar from other diagrams seems to be the center pin shaft which is in open style/clutch diffs.

 

[Cobra Jet]

That's where I'm getting confused then. I've seen a 3.15 aluminum diff housing that has that center bar. And that should have been a traction LOK. Are you sure it's not the other way around? The pics above are both from 3.55 carriers - I'm just trying to determine which is an actual torsen.

This is claimed to have been pulled from a 2015 GT automatic, which sounds right. You can see the center bar there.

YIKES!!

@Howitzer
I had to edit my above response to you (and prior post further up) - sorry for ANY confusion at all....

A TORSEN rear diff, with axles removed, there will not be any bar in it and you'll be able to see through it.

A Trac-loc rear diff, with axles removed, will have the "bar" for the spider gears and you won't be able to "see through" it.

Your SECOND image in your initial question is the TORSEN.

Terribly sorry; didn't realize I had the types crossed in my original info.... Ugh.... I've also gone back through all my rear diff posts and corrected any that had that Torsen note...

 

[Howitzer]

YIKES!!

@Howitzer
I had to edit my above response to you (and prior post further up) - sorry for ANY confusion at all....

A TORSEN rear diff, with axles removed, there will not be any bar in it and you'll be able to see through it.

A Trac-loc rear diff, with axles removed, will have the "bar" for the spider gears and you won't be able to "see through" it.

Your SECOND image in your initial question is the TORSEN.

Terribly sorry; didn't realize I had the types crossed in my original info.... Ugh....

Ahh, no worries. Makes much more sense now, so thank you!

 

[TexasRebel]

torsen does not mean better by the way. it just means that it's going to lock and unlock seamless but it is weaker. drag racing you do not want torsen. autocross you do.

Torsen differentials don't lock.

Sponsored