Calibra Transmission and Gearbox

From Calibra Wiki - Vauxhall, Opel and Holden Information and Technical Resource

In addition to a 4 speed automatic transmission that was available on all models except the C20LET (although some countries such as Australia did not sell the C20XE with the 4 speed auto), there were 5 manual gearboxes for the calibra.

F16CR-5 - Fitted to early 2.0L SOHC NA (ie C20NE)
F18CR-5 - Fitted to late 2.0L SOHC NA and late 2.0L DOHC NA (ie C20NE, X20XEV)
F20 - Fitted to early 2.0L DOHC NA (ie C20XE)
F25 - Fitted to 2.5L NA (ie C25XE, X25XE)
F28/6 - Fitted to 2.0L Turbo (ie C20LET)