Auto to Manual conversion.
Okay. Now for the upgrade I've been really looking forward to. I've never liked the auto transmission in my Spider. Not long after I bought the car I also bought a second hand 5 speed gearbox, clutch and other associated parts, ready for this conversion. My previous experience was limited to changing the clutch in an old Ford Cortina when I was 18 - I can still remember the weight of the gearbox resting on my chest while transmission fluid drained all over me. So I knew enough to know that doing it in my garage would be heavy, dirty and cramped. Luckily, my friendly mechanic let me use his workshop and we worked on it together.
Things I learned:-
- a vehicle hoist and a gearbox hoist are really helpful
- the 5 speed box is lighter than the auto
- the flex plate in the auto is smaller in diameter than the flywheel in the 5 speed, which means the starter motor is in a slightly different position, which means the spacer dust plate thingy is a slightly different shape
- the bolts attaching the manual box to the engine are longer, but are slightly easier to access (but only slightly!)
I knew we needed to modify the drive shaft, and Drummond had kindly shared the dimensions of his when it was out of the car. I had previously discounted the idea of ever finding a second hand drive shaft as there were so few Spiders in NZ, but my mechanic persuaded me it could be worth a quick phone call or two. How right he was! It turns out that a few years ago a Fiat/Alfa service centre on the other side of town had been doing some work on a Spider, and during the road test it got T-boned by another car: write-off. There was a complete, balanced drive shaft, and the proper spacer plate, ready to go. Really good luck for me; incredibly bad luck for the owner of the bashed up Spider.
I had a second hand flywheel that was from an earlier Fiat so it had 10mm bolt holes, but the same PCD, so I had a local engineering shop drill them out to 12mm. The second hand gearbox mount came with a cross arm which didn't fit, but the 5 speed mount fitted the auto cross arm. I don't know what the pedal box was from, but that didn't fit either, and in the end I only needed the pedals. I had been told that, over time, the clutch pedal can distort where the cable hooks on, so I welded in a triangular stiffener. (Definitely need practice - did more grinding than welding!)

Second hand pedal box of unknown origin.
While all the transmission was out of the car we replaced the diff pinion seal and the rear engine seal, because we could. Reassembly was relatively easy thanks to the hoists, We had to jamb a rubber block between the engine and the cross member to tilt the engine to the right angle so as the gear stick would fit through the transmission tunnel opening. Again I had been sold a second hand tunnel cover plate, and again it didn't fit, so I cut one out of sheet aluminium.
We bypassed the cut-off switch that was on the auto shifter, but I'm thinking I might wire it back in with a toggle switch positioned somewhere discreet as an anti-theft measure.