The G80 Locking Differential is a special differential that Volvo began putting in 740/940 rear ends (standard in NORTH AMERICAN market only) beginning in 1991. It was also made available as a factory option for 240s in 1993. Volvo referred to it as the Automatic Locking Differential (A.L.D.).
Not all 1991 740/940 models got a G80, but nearly all 1992 and later RWD Volvos got this differential (North American market).
The G80 differential was manufactured by Eaton and was designed to provide positive locking of the rear wheels during low speeds if extra traction becomes needed, typically below 25 mph (40 km/h). The differential initially acts as an open differential and when it senses a speed difference between the axles, it locks to provide traction to both wheels. As speed increases, the differential can sense the speed change and it then unlocks and stays unlocked for speeds above 25 mph. It does this by using a centrifical weight that changes position as speed increases.
Could be quite the addition to your vehicle
It is in great condition. Asking $395 OBO
Feel free to p.m. me / email me if you are interested!
Can provide pictures via email and answer any questions.
Thanks for reading