Hi,i was wondering if anyone has done a conversion from 5 to 6 speed on a skoda octavia 3 1.6 tdi, 81kw, engine cxxb? Or if anyone knows which gearbox will be plug and play? Same axles, same clutch,same starter motor? And will i be able to code the gearbox with vcds or obdeleven? Thanks in advance,cheers.

Easiest thing is if you find a scrapped late 2017 TDI1.6. These all came with 6 speed gearboxes as standard.

Hi,i have all the necessary bits to make the retrofit,it's only the software part that's bugging me.

Any reason you’re not just buying a car with a six speed box in the first place?

15 minutes ago, SC03OTT said:

Any reason you’re not just buying a car with a six speed box in the first place?

Yes,the car was very cheap, but already had a 5 speed,for 200 euros i got everything needed to make the conversion.i bought the car for 5000 €, plus 200€ of the gearbox, 5.200 €. I'm not quite sure where you will find a 6 speed skoda octavia 3 from 2015 with 115.000 km for 5200.thats basically the reason.

Hi everyone!

I’m also interested in converting my Octavia III 1.6 TDI from a 5-speed to a 6-speed manual gearbox.

Mine is a 2013 1.6 TDI CLHA, originally 105 hp. It has been remapped with an additional 50 hp (around 155 hp in total), and the DPF has also been removed.

I bought it in 2021 for €2,900 with 170,000 km on the clock. It now has around 250,000 km.

Recently, I’ve been having problems with the gearbox, especially when downshifting. Fourth, third and second gears are all becoming very difficult to engage. As far as I can tell, the clutch isn’t slipping and doesn’t seem to be in particularly bad condition.

If the gearbox itself turns out to be the problem, I’d rather replace it with a compatible 6-speed gearbox instead of fitting another 5-speed one.

My main goal would be to reduce engine RPM at motorway speeds, improve fuel economy and make better use of the extra power.

Does anyone know which 6-speed gearbox would be the most compatible with my CLHA engine?

I’d also like to know:

• Would I need anything else apart from the gearbox and gear selector/linkage?

• Can I keep my original driveshafts, gearbox mounts, clutch and flywheel?

• Would any ECU coding or other software changes be necessary?

• Has anyone actually completed this conversion on a front-wheel-drive 1.6 TDI?

I’d really appreciate any advice, especially from anyone who has already done this conversion.

Thanks in advance!