This is kinda basic and I feel like I should know it, but..Can anyone tell me about the design/construction/specs of the 3.55 LSD? Is it a gear-type or clutch-type, etc?

Thanks.

 

http://www.letmebingthatforyou.com/?...5 differential

Check out the wikipedia article.

 

It is the same Trac-Loc differential Ford has been using for many years. It is a clutch-type LSD. It is not really the greatest design, but it's cheap and effective as an LSD as long as it's not abused. There is a way to repack the clutches so it works better, but you will sacrifice with some chatter at low speed parking lot turns.

 

Gee, why didn't I think of that? I'm pretty sure the carbon-fiber discs only apply to the 3.73. That's been pretty well documented. Not so with the other diffs, I believe.

Thanks.

 

Honestly, I just saw that site and found it funny. I was looking for an excuse to use it

 

The gear type of LSD is the Torsen differential, which is an option on the "base" Boss 302 and I think it's standard on the Laguna Seca. Holds up better to abuse (what it would get on a track).

 

I don't quite understand what you're saying. Yes, the TORSEN diff is optional on the BOSS, but it is not available on the GT. All V6/GT models come with clutch-type differentials, regardless of ratio.

I think my confusion has been cleared up. My only experience with LSD (no pun intended) up until now has been with the lame-ish, slow-reacting viscous-coupling LSDs in my Subaru. At first I thought the Mustang might have a viscous-coupling diff because it was a "clutch type", but that was just me being confused (a viscous-coupling LSD uses numerous "plates" which I confused with "clutches").

So there are viscous-coupling LSDs, clutch-type LSDs, TORSEN LSDs, etc. The Mustang comes with clutch-type standard and TORSEN is optional on the BOSS. There are definitely some differences in the design and operation of clutch-type vs. TORSEN.

 

SOunds to me like you've got it!

I recall seeing somewhere that the Torsen is available to retrofit to the GT from FRPP catalog, as a complete axle assembly, for around $1500-$1600.

 

PICS

 

Way cool of you Kevin, thanks!

 

You are Welcome! We are all learning something new everyday! Don't ever feel you are SPINNING your wheels by asking questions.

KC

 

Yes, I think you've helped the OP get some "traction" on this topic!

 

Guys, please stay on topic; we don't want to lose grip on the issue.

 

I'm lollerskating around my office after reading those last few posts!