915 Transmission Case, Magnesium (1972–1977)

The magnesium 915 case, identifiable by its dark grey, slightly rough finish against the brighter aluminium replacement.

Drivetrain Discontinued confidence: medium

Manufacturing

Manufacturer	Pelican Parts
Origin	🇺🇸 United States Vendor head office — place of manufacture not stated
Process	Cast
Additively manufactured	No
Material	Magnesium Alloy
Notes	Light but prone to cracking and corrosion — the same trade Porsche made and later reversed on the crankcase. Worth identifying before buying a used box, because the two are not interchangeable in condition or value.

901	All models (1972–1973)
g-series	All models (1974–1977) Some 1977 boxes pair a magnesium gear case with an aluminium final-drive case. From 1978 and the 911 SC the whole case is aluminium.