Stupid question about the diff.
4/13/11, 08:11 AM
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Stupid question about the diff.
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.
Thanks.
4/13/11, 09:59 AM
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4/13/11, 10:18 AM
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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.
4/13/11, 11:38 AM
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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.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.
Last edited by PolishAmericanMustang; 4/13/11 at 06:51 PM.
4/14/11, 04:49 AM
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4/14/11, 05:20 AM
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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).
4/14/11, 06:46 AM
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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.
4/14/11, 07:38 AM
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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.
Last edited by Double-EDad; 4/14/11 at 07:39 AM.
4/14/11, 09:39 AM
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4/14/11, 12:10 PM
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