marina 1800 tc gearbox
Discussion
It's sounding like it's the stanpart box as fitted to the 1300 marinas, midget 1500s, spitfires (and most similar sized triumphs).
As long as you can find one with the correct input shaft you would be able to swap your bellhousing across.
The other option if it is a weak box is to install an MGB box (god knows why they didn't) with or without overdrive, they sell for peanuts and provided you look after them last for ever. But it will be a longer job than straight swap.
However by the sounds of your issue it shouldn't be a hard job to mend your box.
As long as you can find one with the correct input shaft you would be able to swap your bellhousing across.
The other option if it is a weak box is to install an MGB box (god knows why they didn't) with or without overdrive, they sell for peanuts and provided you look after them last for ever. But it will be a longer job than straight swap.
However by the sounds of your issue it shouldn't be a hard job to mend your box.
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