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-   -   Is LSD standard on the S? (http://986forum.com/forums/showthread.php?t=65493)

Boxx 02-20-2017 10:49 AM

Is LSD standard on the S?
 
Does a Limited Slip Differential come as standard equipment
as part of Boxster S's upgraded suspension and drivetrain components?

Gilles 02-20-2017 11:16 AM

Quote:

Originally Posted by Boxx (Post 527798)
Does a Limited Slip Differential come as standard equipment
as part of Boxster S's upgraded suspension and drivetrain components?

Nope, all have an open differential (not sure about the latest cars) but you do have a few options like a Torsen, Guard, OS Giken, etc. (different types..) but it will change the way your car drives in a awesome way.. stongly recommended

Boxx 02-20-2017 11:31 AM

Was it at least an option?

mikefocke 02-20-2017 12:13 PM

Not in 2001. I have an order sheet and neither traction or slip is found on it.

Boxx 02-20-2017 12:22 PM

I know PCM was an option in 2003.
I thought LSD was at least optional, but not sure when.

Maybe 2003-04 if not 2001?

Gelbster 02-20-2017 12:35 PM

Eric Johnson may be able to get you and LSD.He is the gearbox guru who chimes in sometimes.

The Radium King 02-20-2017 01:29 PM

no mechanical lsd for 986 ever. there was an electronic version that used PSM and ABS but a bit of a misnomer.

Boxx 02-20-2017 02:59 PM

Not ever. Wow.

I guess the occasional posts on LSD are regarding aftermarket units.

Gelbster 02-20-2017 03:04 PM

available here
 
http://986forum.com/forums/general-discussions/64022-anyone-need-new-lsd.html

WillH 02-20-2017 03:12 PM

Quote:

Originally Posted by The Radium King (Post 527821)
no mechanical lsd for 986 ever. there was an electronic version that used PSM and ABS but a bit of a misnomer.

http://986forum.com/forums/general-discussions/62890-what-transaxle-do-i-have.html
Post number #2 ?

The Radium King 02-20-2017 03:23 PM

Quote:

Originally Posted by WillH (Post 527833)

vs post #9 or #19?

j.fro 02-20-2017 03:30 PM

I love my Guard torque biasing diff.

WillH 02-20-2017 03:42 PM

Quote:

Originally Posted by The Radium King (Post 527834)
vs post #9 or #19?

some 5 speeds got LSD according to my G8601-002 trans code.

Not a real 986 as its not an S I guess ;)

The Radium King 02-20-2017 04:13 PM

well, i stand corrected then. never seen one in person, never seen one for sale, never seen the option available, not indicated as available in the PET, and you are the first person i've seen to have one.

WillH 02-20-2017 04:34 PM

Quote:

Originally Posted by The Radium King (Post 527839)
well, i stand corrected then. never seen one in person, never seen one for sale, never seen the option available, not indicated as available in the PET, and you are the first person i've seen to have one.

According to what was written in the post I noted it should be. Trans code would suggest. But I happen to have the car on jack stands as its getting its winter work done and low and behold if it doesn't behave as it should for a limited slip. Is it toast?( I changed trans fluid last year with Porsche oil). Is it a bad joke and the ABS is adding the behaviour? I don't have PASM or traction control that I know of but I'd swear when it lets go both wheels are spinning. I generally get it sideways once a day 5 days a week on my morning commute 6 months a year.

WillH 02-20-2017 04:39 PM

I'll have to do a burn out in the spring for the real answer I guess. One track or two:dance:

Boxtaboy 02-20-2017 05:21 PM

Traction control was an option, but no LSD.

++does boxster 97-03 has traction control?++ - Pelican Parts Technical BBS

Boxx 02-20-2017 05:48 PM

Could traction control mimic an LSD?

I'm thinking it might be able to do it.

Think if a wheel was spinning, while the other one wasn't.
Traction loss. ABS knows. Locks the spinning wheel.
So, open diff, spins the other wheel instead. LSD.

Many gradations of ABS before lock.

thstone 02-21-2017 09:21 AM

Quote:

Originally Posted by Boxx (Post 527857)
Could traction control mimic an LSD?

No. Well, if you meant could TC act as a crappy LSD that acts nothing like a real LSD? Then, maybe.

Quote:

Originally Posted by Boxx (Post 527857)
Think if a wheel was spinning, while the other one wasn't.
Traction loss. ABS knows. Locks the spinning wheel.
So, open diff, spins the other wheel instead. LSD. Many gradations of ABS before lock.

TC and LSD are two different solutions to similar but different problems. ABS does not "lock" the spinning wheel - ABS can only apply the brakes and at the limit of brake lockup, the ABS intervenes. Now you've gone from a wheel that was loosing traction and spinning to a wheel that is nearly skidding while under maximum braking. At the wheel/tire, this isn't the same effect as an LSD which is based on sensing the torque difference between the two rear wheels, not the difference in wheel speed.

I suppose TC/ABS could be considered an approximation of an LSD but its not a very good approximation.

thstone 02-21-2017 09:35 AM

Quote:

Originally Posted by WillH (Post 527837)
some 5 speeds got LSD according to my G8601-002 trans code.

Agree. Very, very rare.

G8600-001 = 5 speed gearbox for 1997 - 1999
G8601-001 = 5 speed gearbox for 2000 - 2004
-001 is non-limited slip differential (LSD)
-002 is for the LSD


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