Guard Transmission LSDs are the industry standard in high performance Porsche differentials. Our CNC billet 4340 chromoly bodies are unrivaled for strength and durability. Our assymetrical ramps and proprietary clutches allow for the adjustability and  tunability to suit the needs of the weekend track day junkie or pro-race team alike. We’ve spent the last two seasons working closely with BGB Motorsports learning the Caymans inside and out. That sort of pro level racing experience benefits you, the PCA Club Racers and DE drivers. We don’t just ship you a “one size fits all” specification or make LSDs for 2 dozen different marques. Each LSD sold is stacked and configured for a single specific customer taking into account your exact chassis, as well as skill and power levels and is backed by 2 decades of transmission experience focused on Porsches and their specific needs.

Pro – High Strength, hardened 4340 Chromoly billet, 8620 cover, multi disc, Pro+ is 100% 8620 billet

Club – 1045 Billet body, still far stronger than any Porsche or ZF LSD. All of our LSDs come standard with 4 friction discs, however, 6 or 8 disc versions are also available.

Pricing fluctuates so we need to call to get the most accurate pricing.

Guard Transmission began as a “behind the scene” supplier of performance transmission components, yet over time they 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. Their 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.