I'm thinking of getting one to fit in my Astra mk11 ,to replace the F20.
Which model will I need,to work with 16v digi-dash?
Do the driveshafts need changing?
Do you use the F20 flywheel and clutch,or are they different?
What benefit's will I see?
I'll try to answer this but someone better check my answers
Which model will I need,to work with 16v digi-dash? - An early one (pre L-reg I think) which will still have a speedo sender on the gearbox. I'm told you need to change the speedo ring inside for one from an F20.
Do the driveshafts need changing? No
Do you use the F20 flywheel and clutch,or are they different? The clutch changes, not sure about the flywheel.
What benefit's will I see? Better fuel ecconomy but thats it. The first 5 gear ratios are almost exactly the same and becasue of the uprated internals you will loose more power through transmission losses. It won't be alot but the car won't go any faster. You might get 40mpg+ on the motorway though.
You will also need a FWD plate to cover the whole in the gearbox where the transfer box normally attaches.