156 JTD 6-speed conversion - Alfa Romeo Forum
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156 JTD 6-speed conversion

Hi all,

I'm considering changing the gearbox in my 8v JTD from 5-speed to 6-speed. I'm doing a lot of long distance driving these days and the longer ratio would be handy for improving MPG..

Now I'm fairly confident from searching on here that the gearbox from a 16v is a straight swap but what I'm NOT clear on is what I'd need to change around the linkages - do these need to be swapped for 16v items? I presume I'd need the gearstick out of a 16v?

thanks
Gav.
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Hi all,

I'm considering changing the gearbox in my 8v JTD from 5-speed to 6-speed. I'm doing a lot of long distance driving these days and the longer ratio would be handy for improving MPG..

Now I'm fairly confident from searching on here that the gearbox from a 16v is a straight swap but what I'm NOT clear on is what I'd need to change around the linkages - do these need to be swapped for 16v items? I presume I'd need the gearstick out of a 16v?

thanks
Gav.
i had years ago an Marea SW 2.4 10v JTD with 5 speed gearbox
for the same reason i get an 166 2.4 10v JTD 6 speed gearbox and simply change it with my mechaniker
gear order was
135
246R

driveshafts, clutch, mounts, evrything was the same, so was no need any other parts to change

just the diff's housing was mounted from the Marea gearbox on the 166 gearbox, for the speed sensor
Fiat reads the vehicle speed from the diff, Alfa from the ABS, so on Alfa diff house wasn't an hole for that sensor
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thanks for the reply!

Did you have to change the gearstick, or was the 5-speed stick usable for 6 speeds?
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thanks for the reply!

Did you have to change the gearstick, or was the 5-speed stick usable for 6 speeds?
Nothing else needs changing. I'm using the 1.9 16v 6-speed gearbox in my 2.4 10v previously a 5-speed.
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excellent, thanks Dan you are the man..
Now off to find a DIY guide on JTD gearbox/clutch change
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Do you need a box Gavin ?
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Might do Myles, do you know one going handy..?
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I do. Currently stripping out a face lift SW 16v 1.9 to use the shell for my 2.4. I did 1200 miles in it and the box is smooth. Clutch hasn't much life left in it but flywheel is good. Will PM you a price.
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Nothing else needs changing. I'm using the 1.9 16v 6-speed gearbox in my 2.4 10v previously a 5-speed.
I thought youd sold that car, was a nice to drive that.

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Currently stripping out a face lift SW 16v 1.9 to use the shell for my 2.4.
Wow, big job, lots of work.
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I thought youd sold that car, was a nice to drive that.
I did, wish I never though. I built another, but its not quite as good as the green one was. Loved that car, I keep pestering Craig to sell it back to me but no luck!
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I thought youd sold that car, was a nice to drive that.



Wow, big job, lots of work.
You said it. We are talking a total spend in the region of 5-6k euro, depending on what I can make from the leftovers with the 1.9. But it means I have a car i want to drive, with fresh paint and known mechanics, speced as I want with factory xenons, sunroof, roofbars together with sorted suspension (GTA springs, reflex dampers, GTA rear bar, GTA teledials on pilot sports) and a monza sport remap with 190bhp/300lb ft. Whats the alternative ? A Golf, A4 ? Money well spent in my book.
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I did, wish I never though. I built another, but its not quite as good as the green one was. Loved that car, I keep pestering Craig to sell it back to me but no luck!
Just borrow it and then "loose" it, get it resprayd and put a private plate on it, lol.

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Originally Posted by Hugh Myles View Post
You said it. We are talking a total spend in the region of 5-6k euro, depending on what I can make from the leftovers with the 1.9. But it means I have a car i want to drive, with fresh paint and known mechanics, speced as I want with factory xenons, sunroof, roofbars together with sorted suspension (GTA springs, reflex dampers, GTA rear bar, GTA teledials on pilot sports) and a monza sport remap with 190bhp/300lb ft. Whats the alternative ? A Golf, A4 ? Money well spent in my book.
Cool, sounds like you should open a "build" thread . . .
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