Well,
After doing a lot of research I have found out it is a Borg Warner T12 1speed transmission (code 10-01). This transmission used a Type 'F' ATF fluid (which is thicker than Dexron). I believe, due to reading through datasheets, this was specified for transmissions that used asbestos clutches rather than the newer paper clutches.
The part# for the UJ is an SKF part - UJ549 - however this seems to be unavailable anywhere in the UK. I have gone through as many parts catalogues as possible and know the exact measurements etc (Bearing Cup Diameter: 4C, Span: 107.92 mm, Block Style: LWD, Span Holes Centres: 87.32 mm, Bracket Holes Distance: 36.52 mm, Block bearings 8 holes not threaded). After searching and searching I have found a part number for DanaSpicer (3050742020) this is unfortunately a HWD so will need milling to fit. I have a contact at Dana who is trying to locate 2 UJ's for me.
Our truck is a bit of a hybrid! Many years ago it came to us with a non-starting engine which was found to be a blocked particulate filter. We removed the filter and the engine ran but it was in a bad way (we assumed it had been rev'd hard before the filter totally clogged). We have ended up fitting a 2.5Di engine out of a Ford Transit van, this has given us many years of service until the transmission started to leak.
We thought the trans was just the seals, but upon inspecting the torque convertor one of the internal screws in the pump shaft had gone - it has mashed up the inside of the convertor really good, but it still works, the leak is from the missing screw. We have redrilled and replaced the screw and used loctite on all the remaining screws.
Were in the middle of making a new flex plate as it has got fatigue cracks (after 49 odd years its expected!!) and then we can get it all back together again!
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