1991 Golf 2 GTi G60 Gearbox upgrade from O2A to O2J Help needed

Hello guys,

I own a 1991 Golf 2 G60 (A/C car but took it out) for almost 10 years now and ive modded alot of things along the years and time has come to change or upgrade the gearbox.

Im not a mechanic but do love it and would like to have some help in choosing the right box for my car. The car is not standard and has the following mods:

Bartek 2.0 Stroker kit
XXL Intercooler
Schrick cams asymetric 286º (not sure on the degrees but think its this)
Zetec Headers
Custom fuel rail with bigger injectors 440 if im not mistaken
Vibratecnics engine mounts and a few Powerflex upgrades too
KW V3
Full stainless exhaust with central muffler and final muffler 68mm
KN box filter
AEM fuel air wideband
Wheels 15in x 8"
Fuel regulator

I might be missing other stuff but i think this is enough for the discussion. The car has been tuned with a chip and came out with 215hp and 298nm but im planning to get a standalone ECU and redo the engine loom for better numbers and better reliability.

Ive been reading alot about the gearbox swap from O2A to O2J but im still a bit unsure what gearing to use. My gearbox is the O2A but i suspect it has different gearing from the original spec since 5th gear cuts off at around 230 km/hr which ive heard is pretty low and should be closer to 250 km/hr or more that it cuts off 5th. Im not a big fan of top speed but more 0-200 km/hr range. I plan on installing a Diff with the new gearbox.

From reading forums and stuff online ive gathered that gearing wise i should look for:

1st - 4th from VR6
5th from a TDi
Final drive from G60

Ive also read about the CTN box but im confused its a 02A or OJ2?
Also any thoughts about the gearing? What would you guys go for?

Thanks alot and hope you guys can give me some help on this

 

Forgot to mention the car is 2WD

 

I've a CTN box in my engine modded Corrado G60 and i think it works very well ,Its an O2A box but i have an 02J shifter on it.

 

Thanks for the feedback guys gonna look into this and get back with updates and pics when the work starts. Im still at the RnD phase of it ahahah.

My gearbox is a O2A but im almost sure it is not original inside because the car cuts out at 230km/hr and in 5th gear im at around 4000 (+/-) rpm at 120 km/hr so i think its been changed by a previous owner.

Anyway of checking the gears when taking apart the box? is there a reference on them?

Thanks alot for the help guys

 

The code on my Gearbox is this: 1 ATX 17059

So it should be from 17 of May 1999?

 

ATX Passat 89/90 3.778 2.118 1.345 0.97 0.795 3.944

i got this info for it.

Maybe its not the original from this engine. I bought the car and it hadn't run in for 6-7years so i suspect maybe it was changed in its past by someone. dunno

my car is from July 1991

 

Which components from the Shift Tower of the Polo 6n2 1.4 tdi do i need to buy for my gearbox (A2O ATX) do i need? is it plug and play on the Golf or do i need to cut or drill holes in the tunnel section?

 

I found a Polo 6N2 1.4tdi nearby with all the parts should i just buy the whole assembly gearbox and shift tower with the cables? You mean mk4 Golf?

Does the 5th gear of this Polo work too for my gearbox? or do i need to know the gearbox code first?

 

When you say from the Mk4 the tower cables etc its from mk4 Golf any of them? Im a bit confused. The problem is they wont sell me the brackets that is on top and bottom of the gearbox for the cables unless i buy the whole gearbox.

Basically this is what i need right? In terms of the cables tower and brackets? As an example.

https://www.vwvortex.com/threads/02j-shift-tower-and-shift-box-cables.9525921/

 

Hey guys so I haven't been able to get that car for parts. Does anyone know part numbers for the shift tower cables and the other accessories to make the upgrade on my O2A? Im going to do this first and after worry about the gearbox i have and upgrade the internals.

 

I found a 02J with this code on the Gearbox:
O2J 301 107 C

From Beetle 2.0 from year 2000

Does it work?

i also found this, if it works its perfect i think:

https://srotas.pt/product/s28814337262/

 

Thanks alot mate, youve been a great help

I think im getting somewhere now, sorry its so much info its hard to understand everything.

I got another question about the link you sent they talk about this:

if brackets are cut out of tunnel:
6N0 803 875 - NLA
6N0 803 876 - NLA

Do i need these too or i can use the ones there?

Fabrication for me is no problem since I work in Classic Car Restorations and I work with 2 excellent metal workers/fabricators that do all the bodywork (aluminium cars included) for classic cars and are true artisans and should be able to mock up brackets or so if its not super complicated. So if i need to invent something i think it shouldn't be an issue but would rather get the OEM part if possible.