I've never done a Triumph one, but have rebuilt 3 (of different ratios) for the Sprite, its not that difficult to do once you get your head around it. If you fancy having a go yourself i could help with a few links. RR
Mike papworth has an enviable reputation. Probably available cheaper elsewhere, but riskier. trouble is, with a used crownwheel and pinion it is not always possible to build a silent diff. However, shouldn't be too loud if set up correctly. I know a local chap and he talked me through how to do it. Sounds easy when said quickly over a pint
Location-Brighton, East Sussex Foxy is here, 1500od tax exempt Toledo. Now has the decent engine back in Slant 4 engine bolted in, sprint box and axle. Just needs fettling and will be on the road.... Spitfire Zetec project is started work progressing slooooowly on the road!
They whine when the case hardening has worn through and no amount of setting up will solve that problem.
Yes, true if its worn out, but new bearings, shim & thrust washers can make a huge difference, the critical bit is the pinion preload setting, but you can make a tool for that for about 1p, heres a picture of my expensive 1-10lb/ft torque wrench, patent pending RR
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