Per title can it be done, I have 6 box available fro a Seat Altea 1.2tsi.

Fabia is a Feb 2010, Altea is March 2010.

I know a guy who might be able to answer but summoning his name could cause a shift in the continuum.

@Tech1e

@DieselMonte might be able to help. Maybe look at his build thread and 6 speed gearbox conversion.

On 27/06/2026 at 16:36, Kenrw8 said:

Per title can it be done, I have 6 box available fro a Seat Altea 1.2tsi.

Fabia is a Feb 2010, Altea is March 2010.

Yes, but not with an Altea gearbox.

Lee01 , Evolution13 and Tech1e

Thanks for the responses Did some more investigating and 6 peed conversion would not be possible for a another reason , I had a 02m LSD fitted only compatible for the 5 speed box, an 02j-2 is 5 or 6 speed boxes.

Now looking at swapping the engines , I had the timing chain changed on the Fabia at 85K , now at 135k whereas the Altea changed at 69k now 81k, fabia is a 84bhp, remapped to 122bhp whereas is a 103bhp, plan to use the fabia remapped ecu. Is this feasible

Edited Sunday at 19:292 days by Kenrw8

15 hours ago, Evolution13 said:

@DieselMonte might be able to help. Maybe look at his build thread and 6 speed gearbox conversion.

Mine was mk1 fabia vRS box to a MK2 1.6tdi fab

You'd want to find a 6 speed petrol box for whatever petrol Ibiza/polo of the era.

Bet an altea box would have different mounting points and wouldn't fit to the chassis without major reworking.

Wheel speeds done by abs so no issue there

Hubs/driveshafts fit fine

It's basically a case of swap EVERYTHING over, flywheel/clutch, driveshafts and bolts for such etc.

Really wasn't hugely difficult vs just changing a clutch.

Most of my problems was fitting boost pipes over the new, much bigger gearbox.

Ive got a braided clutch line from darkside, 5 speed one won't work and the 6 speed pipe was pretty poor.

Shifters in the cabin are all the same, mine currently has a mk1 fabia sdi shifter box as it was in better shape than the original one in mine.