Hi,

I've finally got around to fitting an M41 to my Amazon to replace the original M40. I got an M41 and front propshaft section from a 1971 P1800ES and have fitted the gearbox. When I went to fit the (replacement) front propshaft section, I found that the flange was too big to go through the closed off section of propshaft tunnel in front of the support bearing area. The area around the universal joint seems to be larger on the new propshaft section as well so I don't think that I can simply swap the flanges between the shafts.

So.... the best option appears to me to replace the flange on the overdrive unit with the smaller M40 flange and then to cut the original front propshaft section to the correct length. That way I'd have a smaller flange to pass through the tunnel and a matching flange on the overdrive unit. Does that seem to be the best solution or is there an easier way of approaching this?

Secondly, as regards wiring - do I need to use a relay when passing current to the solonoid and if so what kind/specification of relay is used?

There are two terminals on the solonoid and a disconnected wire from the unit itself. Does it matter which terminal this wire is connected to - can the live feed go to either terminal?

Thanks for any help or suggestions,

Aidan
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1967 131, 1969 131, 1973 Triumph GT6, 1972 Triumph Spitfire 2.5