limited slip differential question for S550 mustangs

Jan 7, 2018
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#1
how long does the limited slip differential usually last in these mustangs? I've heard so many bad things about traction lok, I'm worried mine won't last long, but I have took care of it so far, had the fluids changed at 48K
 
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Jan 7, 2018
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#3
they don't last long, the clutches wear out fast...they're cheaply made..etc etc.
 
Jan 7, 2018
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#5
I can't quote any Ford sources, but I looked around the internet, and many people are saying the traction lok lsd is weak. I asked a Ford tech what he thinks, but I haven't got an answer yet. like I said, I had my differential fluids changed at 48 K, I'm just below 53K in my '15 ecoboost, I'm doing my best to maintain the stang, and so far its been a good car, and the lsd seems to be doing it's job, but I just am worried about premature failure in those limited slips. I've heard different things.
 

Noobz347

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#6
Well, the Trac-Loc that's in these cars hasn't changed much since they started stuffing them into Mustang 8.8s in 1985.

Since then, there have been folks that run them on the street daily then rip 8 to 10 second quarter miles on the weekends. :shrug:

The new Torsen version doesn't have clutches that wear but it's also not tune-able like a clutch pack is. Depending on your friction material and clutch stack, you can go from well mannered street to much heavier load for racing.

I'm sure that there might be good reason for choosing one over the other but really don't think longevity or durability are the issue you're looking for to make that choice.

Conditions where wheels might leave the ground regularly (say, a road course) would be better suited to a Trac-Loc ans one wheel wouldn't be allowed to just run away. Otherwise, I could see an argument for the Torsen style of differential lock. The differences would be similar to comparing an Eaton to a Trac-Loc.
 

ddtmoto

New Member
Dec 7, 2012
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#7
I can't quote any Ford sources, but I looked around the internet, and many people are saying the traction lok lsd is weak. I asked a Ford tech what he thinks, but I haven't got an answer yet. like I said, I had my differential fluids changed at 48 K, I'm just below 53K in my '15 ecoboost, I'm doing my best to maintain the stang, and so far its been a good car, and the lsd seems to be doing it's job, but I just am worried about premature failure in those limited slips. I've heard different things.
Sounds.like you take care of your Stang.
Don't worry so much about a problem that doesn't exist, be happy....just drive it and enjoy your car. Gotta love the interweb information. Beat thing and you will probably find weaknesses
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
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#8
they don't last long, the clutches wear out fast...they're cheaply made..etc etc.
That really is news to me. Granted it is no longer a daily driver but my last clutch pack (arranged with the extra clutch disk from the previous pack) is very alive and well after 17 years being pushed by more than 500 crank HP and 600 crank TQ. There are many dudes here making that kind of power or more that drag them often. I can't recall seeing/hearing anyone who has broken one. Never see a pic of one either.

If anyone has images of one of these things coming apart, I would like to see them.
 

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