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Author Topic: mk3 golf gti 16v better ratio gearbox?  (Read 11606 times)

Offline Paul86S2

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #10 on: 10 February 2011, 13:05 »
Quote from: tshirt2k on 09 February 2011, 22:33
It's not misleading. 02A's don't need to be from mk3s to fit. As long as it's a 4cyl it will fit.
You can make them fit but they aren't a straight swop. If you use one from a Mk4 you will need to change either the shift tower or the cables. I believe you may will also need to change the drive shaft flanges depending on what gearbox you get. There is also some modification required to the shift cable bracketry dependent on which set up you use.

Paul
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Offline tshirt2k

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #11 on: 11 February 2011, 21:06 »
Quote from: Paul86S2 on 10 February 2011, 13:05
Quote from: tshirt2k on 09 February 2011, 22:33
It's not misleading. 02A's don't need to be from mk3s to fit. As long as it's a 4cyl it will fit.
You can make them fit but they aren't a straight swop. If you use one from a Mk4 you will need to change either the shift tower or the cables. I believe you may will also need to change the drive shaft flanges depending on what gearbox you get. There is also some modification required to the shift cable bracketry dependent on which set up you use.

Paul

Mk4's have 02j's not 02A's. Drive shafts may be an issue. But can be got around easily.
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Offline Ess_Three

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #12 on: 12 February 2011, 20:33 »
Quote from: tshirt2k on 11 February 2011, 21:06
Mk4's have 02j's not 02A's. Drive shafts may be an issue. But can be got around easily.

02A/02J basically the same...drive flanges differ, as covered by Paul above.
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Offline Ess_Three

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #13 on: 12 February 2011, 20:40 »
16v O2A has a reasonably decent set of ratios...its the FD that's too high.

Passat 'box has the 3.94 FD...but bad ratios, giving similar overall results...CCM 'box maybe?

A good solution is the 3.94 FD into the DPA/CDA 16v 'box...
Or a 4.2 if you feel brave.
I've had both.

Preferably with a Quaife/Peloquin diff...and a light flywheel.

For road use, and a daily driver...a 3.94 FD (std is 3.67) is great...
For a weekend toy...a 4.2 is superb...but you really need work to the ABF to give more power up top to make best use of it.
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Offline Khare

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #14 on: 12 February 2011, 20:47 »
Is it difficult changing the FD?

When my clutch goes (touch wood not any time soon) I want to crack the box open and service it. Whilst it's open I'd like to stick a 3.94 FD, lighter flywheel and MAYBE, IF money allows a nice diff. If not then buy a bolt kit for the diff and get rid of the nasty rivets.
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Offline Ess_Three

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #15 on: 12 February 2011, 20:58 »
Quote from: Khare on 12 February 2011, 20:47
Is it difficult changing the FD?

Yes, in so much that you have the strip the 'box to get the diff out...new bearings in, and shim the diff.


Quote
When my clutch goes (touch wood not any time soon) I want to crack the box open and service it. Whilst it's open I'd like to stick a 3.94 FD, lighter flywheel and MAYBE, IF money allows a nice diff. If not then buy a bolt kit for the diff and get rid of the nasty rivets.

Good choice...
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Offline Khare

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #16 on: 12 February 2011, 21:01 »
What is shimming the diff?

Well seeing as I plan on opening it to bolt the diff up and change any seals then I guess the FD will be along the way  :smiley:
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Offline Ess_Three

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #17 on: 12 February 2011, 22:46 »
Quote from: Khare on 12 February 2011, 21:01
What is shimming the diff?

You need to dummy build it, measure the play in the diff bearings, and order the correct shims from VW to give the correct play....as I recall...as my mate built mine and he works for VW, so getting shims was easy.
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Offline LazyLunatic

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Re: mk3 golf gti 16v better ratio gearbox?
« Reply #18 on: 13 February 2011, 00:20 »
My current 02A box seems to have been played with. It is from a Corrado 16v, but it tops out earlier than expected. I'm guessing a shorter final drive :undecided:

Got a G60 and a TDI box to try out, so the TDI will be going in soon, will suit me much better as 1st and 2nd are way too short. As said earlier 3rd is nice and its only then you can really pull.

Oh and my car is a daily drive, so would be nicer onto a day to day basis too and lower revs when cruising up the motorway.
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