Upgrade to Torsen Differential?

[Edgemere]

Greetings,

I have a 2022 Mustang GT Premium, manual transmission, 3.55 gears, non Performance Pack. I bought the car used last Fall with only 500 miles on it. It was a great deal, but I wish it would have come with the Performance Pack. Because it didn't, I will be totally upgrading my suspension this Spring, with shock, struts, springs, sway bars, front control arms, vertical links, rear toe links, and a bunch of BMR IRS rear wheel hop stuff.

I will not be going to the track or drag strip. I am a weekend driver in the Summer months only. My main goal is to get a decent suspension. One that should have come with my Mustang. My question is, does it make sense upgrading my Mustang with the Torsen Differential too? If I do this what else is needed? Would I need a new Ring and Pinion gear kit? I am just fine with the stock 3.55 gears.

Trying to duplicate the Performance Pack ala cart, which I did not get, would be way to expensive to do. That being said, what are your thoughts on taking it one step further with the Torsen Differential? Please advise.

Thanks..........

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[K4fxd]

The torsen is smoother in the turns. To change it the entire center section or pumpkin needs to come out, then the internals need to come out. You can swap the 3.55 ring gear onto the torsen, then you need to set up the gears.

It is 12 hours book time to pull and replace the center section and probably another 5 hours swapping the diff and setting up the gears.

Easiest way would be to find a torsen equipped center section in a JY and just swap that. They usually have 3.73 gears. Still a pretty good labor hit unless you can do it yourself.

 

[Strokerswild]

Personally, I'd swap the entire pumpkin for one with the Torsen and the 3.73 gears. The additional rear gear will be a benefit since your trans has taller gearing than the pre-'18 units.

 

[IPOGT]

For what you do it’s wasting money IMO. Do the FP track or Street performance kit, upper and lower braces and the control arms. Consider Bilstein B6 also. put the FP PP2 or 3 tune on it and the PS4s tires and that’ll do exactly what you want. I did it all to my 2016 non pp and it was GREAT. This removes the slightly floaty feeling our comfort compromised GT’s have and will give your car that hunkered down controlled sporty feeling you’re probably looking for.

 

[JFBullitt]

For what you do it’s wasting money IMO. Do the FP track or Street performance kit, upper and lower braces and the control arms. Consider Bilstein B6 also. put the FP PP2 or 3 tune on it and the PS4s tires and that’ll do exactly what you want. I did it all to my 2016 non pp and it was GREAT.

Agreed.

No need to overkill on suspension for a summer only street car.

 

[CobaltFilly]

For what you do it’s wasting money IMO. Do the FP track or Street performance kit, upper and lower braces and the control arms. Consider Bilstein B6 also. put the FP PP2 or 3 tune on it and the PS4s tires and that’ll do exactly what you want. I did it all to my 2016 non pp and it was GREAT.

I am going to be taking mine to get 3.73 gears installed in my base car. It will be my DD with very light (super novice amateur for now) Autocross. Is the 3.73 gears in the normal diff fine? I don’t *need* the Torsen diff for this correct?

 

[K4fxd]

Depends on if you have an Auto or a Manual trans.

3.15 in the auto will need a differential change. 3.31 or 3.55 will not.

 

[ice445]

I am going to be taking mine to get 3.73 gears installed in my base car. It will be my DD with very light (super novice amateur for now) Autocross. Is the 3.73 gears in the normal diff fine? I don’t *need* the Torsen diff for this correct?

3.55 to 3.73 is pointless. Go 4.09 for the cost involved.

 

[CobaltFilly]

Depends on if you have an Auto or a Manual trans.

3.15 in the auto will need a differential change. 3.31 or 3.55 will not.

Auto. It will need a diff change to make it work? Does the auto put too much stress on the stock diff with 3.73 gears?

 

[K4fxd]

Auto. It will need a diff change to make it work? Does the auto put too much stress on the stock diff with 3.73 gears?

Due to the size, (width), of the 3.15 ring gear it uses a different differential.

 

[PhillyMike]

Greetings,

I have a 2022 Mustang GT Premium, manual transmission, 3.55 gears, non Performance Pack. I bought the car used last Fall with only 500 miles on it. It was a great deal, but I wish it would have come with the Performance Pack. Because it didn't, I will be totally upgrading my suspension this Spring, with shock, struts, springs, sway bars, front control arms, vertical links, rear toe links, and a bunch of BMR IRS rear wheel hop stuff.

I will not be going to the track or drag strip. I am a weekend driver in the Summer months only. My main goal is to get a decent suspension. One that should have come with my Mustang. My question is, does it make sense upgrading my Mustang with the Torsen Differential too? If I do this what else is needed? Would I need a new Ring and Pinion gear kit? I am just fine with the stock 3.55 gears.

Trying to duplicate the Performance Pack ala cart, which I did not get, would be way to expensive to do. That being said, what are your thoughts on taking it one step further with the Torsen Differential? Please advise.

Thanks..........

Most would recommend just doing this first,: https://www.levittownfordparts.com/sku/m-fr3a-m8a.html

Then see if you need the BMR lockout or Steeda STH kit of your choice. For your use, doubt the Torsen is worth the expense right now. Maybe later as the clutch-based LSD wears down swap out.

 

[CobaltFilly]

Due to the size, (width), of the 3.15 ring gear it uses a different differential.

You rock, thanks as always for your valuable info and time.

 

[geep81]

3.55 to 3.73 is pointless. Go 4.09 for the cost involved.

This is what I was advised as well for a base model GT with 3.55.

3.73 not going to be too noticeable. Especially for the cost involved.

 

[Cobra Jet]

Personally, I'd swap the entire pumpkin for one with the Torsen and the 3.73 gears. The additional rear gear will be a benefit since your trans has taller gearing than the pre-'18 units.

This would be best option and cost the least as far as labor IF having a shop do the swap.

I would definitely make sure when buying loaded used rear diffs:

- If from a salvage recycler ask to see if they offer any type of warranty (usually 60-90 day) that the diff is good. Some of these facilities will document the VIN and mileage upon removal, as well as confirm the part was good/operational prior to removal.

- Make sure you know the difference between a Track Loc and Torsen; visit this thread if you’re needing to know how:
https://www.mustang6g.com/forums/th...pp1-a10-5-0-torsen.103184/page-2#post-3720075

- If buying used from private party - be very careful and again, make sure you know what you’re buying by the above thread. Some scammers are trying to sell Torsens that are standard Trac-Locs. Also just because someone says the rear diff may be “3.73”, you have to determine if that is true. I can pick up any diff and claim it’s “3.73” and could pawn off a 3.55… or less of a gear…. So do your due diligence when buying a loaded used rear diff!

- If you are looking at a diff in person, try to manually turn the pinion flange. Listen for anything out of the ordinary such as grinding and make sure the diff will rotate without major binding. If the seller will allow it, pop the rear cover and check for any major metal debris or visible hardware damages.

 

[Edgemere]

Most would recommend just doing this first,: https://www.levittownfordparts.com/sku/m-fr3a-m8a.html

Then see if you need the BMR lockout or Steeda STH kit of your choice. For your use, doubt the Torsen is worth the expense right now. Maybe later as the clutch-based LSD wears down swap out.

Thanks, I already have the FRPP shock & strut kit w/ Steeda Minimum Drop Springs in my garage for a spring install. I was just wondering since I was already replacing my suspension what everyone's thoughts were on the Torsen differential.

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