Question: installing LSD on 2003 996 C2

[sanjeev]

Hi all:

I would like to have an LSD unit installed in my 6-sp C2 w/PSM (MY2003).

What are the best options - here's the one's I think are potential

- factory unit (from 2004 Anniv 911)

- Guard Transmissions LSD (what type and specs?)

- Quaife ATB

Has anyone had experience with any of these?

Retrofit costs? Potential hiccups, incompatibility w/PSM?

Thanks,

- Sanjeev

[ldrhoades]

I had the box in my 2000 996 upggraded to a GT torque biasing uint. I LOVE it. It has totally transformed the car. Well worth the $1400! I track the car several times a year, and it really puts the power to the ground. It's the best $1400 upgrade I've ever done to a vehicle. I had my installed at GBOX (talk to Ryan) in Colorado. Reputable guys, EXTREMELY knowledgeable.

Good luck,

-Lennie

[sanjeev]

I had the box in my 2000 996 upggraded to a GT torque biasing uint. I LOVE it. It has totally transformed the car. Well worth the $1400! I track the car several times a year, and it really puts the power to the ground. It's the best $1400 upgrade I've ever done to a vehicle. I had my installed at GBOX (talk to Ryan) in Colorado. Reputable guys, EXTREMELY knowledgeable.

Good luck,

-Lennie

Lennie,

Thanks for your feedback. I'm curious as to why you selected (or were advised) on

the Torque Biasing vs the traditional LSD. What are the noticeable or functional

characteristics that differ between these two types.

Have you noticed any additional noise? Other issues? Greater understeer at the track?

Thanks for your help.

- Sanjeev

[wwest]

I had the box in my 2000 996 upggraded to a GT torque biasing uint. I LOVE it. It has totally transformed the car. Well worth the $1400! I track the car several times a year, and it really puts the power to the ground. It's the best $1400 upgrade I've ever done to a vehicle. I had my installed at GBOX (talk to Ryan) in Colorado. Reputable guys, EXTREMELY knowledgeable.

Good luck,

-Lennie

Lennie,

Thanks for your feedback. I'm curious as to why you selected (or were advised) on

the Torque Biasing vs the traditional LSD. What are the noticeable or functional

characteristics that differ between these two types.

Have you noticed any additional noise? Other issues? Greater understeer at the track?

Thanks for your help.

- Sanjeev

I would think that PSM's "virtual" rear LSD's QUICK acting capability would prevent a traditional LSD from ever coming into play/use.

Whereas a torque biasing LSD would probably be transparent to PSM except in extreme cases.

[ldrhoades]

My car doesn't have PSM, so I can't comment on that. In talking with the guys at GBOX I decided on the torque biasing. Most of the use of the car is on the street, and I get excellent hook up on low spped corners (track or otherwise). There is no additional noise (when I'm being sensible - I've got fabspeed cat AND muffler bypasses so the car is normally really, really loud, only put the fabspeed maxflow exhaust on when I'm at noise-limited tracks). I'd strongly encourage you to talk to Ryan at GBOX. He spent HOURS on the phone with me before I finally made my decision. Very, very knowledgeable, no hard sells on anything.

Good Luck,

-Lennie