Hi

You need a 75w-90 for the gearbox and here are the ones we have.

http://www.opieoils.co.uk/c-673-75w-...ion-fluid.aspx

If you want to go for the best, the Millers CRX 75w-90 NT, Gulf Competition, Motul Gear 300, Redline MT90 and Millers TRX are ideal for the gearbox. The Castrol Universal, Motul Motylgear and Fuchs Gear Syn are all decent alternatives.

Cheers

Tim