Not sure on gear ratios but the PK4 box that the Mk3's use is a fairly big box, hence you cant really fit them to a Clio if doing Megane conversion. Should fit in a Mk2 Megane though, the DCi uses the same box IIRC
All correct but the PK4 is also fitted to the 2.0 DCI megane 2 so it should fit within R26 engine bay. However the fit to the F4Q block is a different story on which i cannot comment on as i don't know.
What about the differences in 225 box and R26 box? Is it really the same box but R26 has a diff fitted inside it?
I'm not sure clued up on the MK2s, LSD for definite though, ratios might be different but I couldn't tell you
Sorry but i thought you meant 2.0dci Mk3 megane rather than MK2. Nevermind, we got there in the end...
Ph 2 225 (Ph1 box has a deifferent selctor on so not sure if these can be swapped) and R26 boxes are the same just the R26 has the diff. Seen a lot of people put the R26 diff straight into a 225 box with no issues