Guard TransmissionLimited Slip Differential Rebuild/Upgrade Kit for 996 / 997 GT3 / RS, 997.2 GT3 / RS / 4.0

Guard Transmission LSDs are the industry standard in high performance Porsche differentials. We have exclusively used GT Gears for all of our LSD & gearing needs for over 17 years whether it be on our own GT3RS and/or GT3 personal R&D cars or indeed many of our GT3/RS, Cayman, GT2 builds. Our GT4 in particular was outfitted from the factory with a weak stock LSD unit that is known to wear out. With the additional power being made on our build we utilize the much-improved & beefier Guard unit to help lay the power down. The factory GT3 LSD unit contains rather weak internals that wear out quickly leaving your car with a rather unsafe 'open diff'. This Guard upgrade comes with stronger/superior ramps and clutches fr a 40/60 split. Not only is the factory 997 GT3 / RS limited slip unit weak but it wears out incredibly quickly and with this upgrade you'll gain back more confidence and traction. Not only does it improve the LSD function, but it will give better wear on brakes and tires because you’re actually breaking traction at the asphalt less.

Rebuild kit also includes, new o-ring housing gasket set and x12 differential housing bolts 

About Guard
Guard Transmission began as a “behind the scene” supplier of performance transmission components, yet over time we have become quite well known worldwide among Pro racers and transmission builders who specialize in 911-based race cars. October 10th 1999, was the turning point for our company (and a great race day for Porsche), with the 1st, 2nd, and 3rd place cars in the GT class of the American Le Mans race at Laguna Seca utilizing our gears and differentials. Ou components have remained in the top GT Pro cars ever since, including all ALMS, Pro Am, and SCCA series GT winners; 2001, 2002, and 2003 Daytona 24-hour winning GT class cars (including the 2003 overall winner); and a large percentage of top club race cars nationwide.