Limited Slip Differentials

Limited Slip Differentials

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.



LSD Application
GT2 Pro GT2/GT3/G50/996/Turbo/968/Boxster S ’00-’04
GT3 Club GT2/GT3/G50/996/Turbo/968/Boxster S ’00-’04
GT1 Pro+ GT2/GT3/G50/996/Turbo/968/Boxster S ’00-’04
997 Pro 997 Carrera 2/Carrera 4
987 Pro Cayman 5-Spd, Boxster 5-Spd 2005-on
Cayman S Pro Cayman S/Boxster S 6-Spd 2005-on
Cayman S Club Cayman S/Boxster S 6-Spd 2005-on
986 Pro Boxster to late 1999 (G86.00 & 01 w/012)
986 Club Boxster to late 1999 (G86.00 & 01 w/012)
930 Pro 930/915 late (fine spline)
915 Pro 915 (mid 1975-1977 coarse spline)
914 Pro 914/901 late (mag case) /915 early (1972-1974)
951 Pro 951/944 (oil pump drive gear available separately)
904 Pro 904/901 Early (aluminum case)