what gearbox is best

[andc1]

hi all, in my mk1 i have a valver engine and using a standard 1.8 gti gearbox original from the mk1, is this the best box to use for performance?

[garethmk1]

NO!!!!! It's far from it, get yourself a 2Y 020 and swap the flanges ! Then you'll have a properly performing Mk1 16v 

[andc1]

what sort of box is that out of? 16 valve gearbox is it?

[SoundillusioN]

what sort of box is that out of? 16 valve gearbox is it?

Yes mate, i believe thats the mk2 valver box

[garethmk1]

yes it is sorry for not making it clear - it's the only way you'll get a 16v to perform correctly - a 2Y 020 boc is for a 16v.  You will need to swap the flanges on the gearbox from the mk2 items to the mk1, the main shaft also has an extra spline so only a 16v clutch will fit - you'll have to junk the 8v one - seriously thought spend the money it is worth it.

Regards,

Gareth

[andc1]

will it fit in the bay ok then? i have the chance to buy a mk2 valver quiet cheap so is it worth getting the whole car and doing it?

[garethmk1]

will it fit in the bay ok then?

Yes it will - as I said, change the clutch and the flanges

i have the chance to buy a mk2 valver quiet cheap so is it worth getting the whole car and doing it?

If you think that buying a Mk2 and transplating everything will work think again.  What mk1 do you have GTI / Carb small block ?
That'll be the first thing, then you'll need a whole host of other items such as a loom, exhaust manifold ......

There is so much to consider ... do some research regarding Mk1 16v's theres plenty of into in cyberspace and you'll find out exactly what you need - a mk2 16v isn't enough.

[andc1]

ive got a mk1 golf 16 valve engine already in! just the wrong gearbox on it

[andc1]

is there a guide on removing gearbox on here anywhere or somewhere else? ive never took one off so a few pointers will be greatfully apreciated!!, ive got a complete mk2 valver so all the bits are there to change the box over

[SoundillusioN]

Not a specialist subject for me i'm afraid but i believe that mating a 16v to the original gearbox is easier than changing the whole lot due to different selector linkages required and work required with drive shafts etc hence why the 8v box is still in your car.  As far as getting the one you have out, its not something i'd want to do on my own for the first time by reading a guide.

You'd need to do things like support the front of the car on axle stands so the wheels have no weight on them, strip everything thats gonna get in your way, engine cables, pipes etc.  remove drive shafts from hubs and gearbox because i dont think the mk2 16v driveshafts are any use, you would need late scirocco or cabby shafts which have the larger 100mm inner cvs, they are the correct length and have the correct outer cv for the mk1 hubs.

You could swap the drive flange on the mk2 16v gearbox to take the smaller mk1 90mm inner cvs. This way you can use your existing mk1 driveshafts.   You'd probably need a pump jack to support the engine and an engine crane to support the box when you've undone everything or vise versa.  I'm sure all the detail for dropping you're current box out and putting 1 back in is covered in a haynes manual.