I drive way too fast
to worry about
Join Date: Jun 2006
Location: United Kingdom
Re: alfa 156 gearbox swop
The Biggest difference between the 2.4 JTD and the twin spark, is the torque capability.
Alfa give the gearboxes a code. The 2.5 V6, 1.9 JTD and the 2.4 JTD, use a C530 box, whereas the twin sparks use the C510. (What an anorak I am eh?)
The casings are also different, mainly on the bell housing if I remember correctly. You may find a V6 one will do it but I'm not sure if it will bolt straight on or if you'll have to change the bell housing. Plus the ratios will be different too!
Safest bet is go onto Find-a-parts or similar and see if you can find the right one.
Hope that helps!!