milesmiles999 Posted June 26, 2019 Report Share Posted June 26, 2019 I finally got round to removing the engine and box out of my Vitesse, to sort rattly bottom end mainly. Clutch looked shot so ordered a new kit. Clutch turned up and plate doesn't fit. Turns out the box is a KC serial numbered unit I think from a GT6, but the input shaft is 23 splines, which seems to make clutch plate replacement a bit of a mystery. A pic of the clutch plate I removed is attached. Everything I've read says including the workshop manual suggests number of splines should be 10! Any ideas? Cheers. Miles Link to comment Share on other sites More sharing options...
johny Posted June 26, 2019 Report Share Posted June 26, 2019 I believe somebody has used the later Dolomite 1850 internals in your box as they are better. The clutch friction plates are interchangeable so you need an 1850 one.... Link to comment Share on other sites More sharing options...
daverclasper Posted June 26, 2019 Report Share Posted June 26, 2019 I have a bitza on the Vitesse, that has Dolly 1850 shafts (this was so a J type overdrive could be fitted I understand). Box was rebuilt by Mike Papworth (bit of a guru on Triumph B/G) who I think advised that TR7 friction plates fit as well. Dave Link to comment Share on other sites More sharing options...
JohnD Posted June 26, 2019 Report Share Posted June 26, 2019 Gods, Miles, that is WORN! Can't be original, so someone has been riding the clutch! JOhn Link to comment Share on other sites More sharing options...
NonMember Posted June 26, 2019 Report Share Posted June 26, 2019 As they said, the Dolomite 1850 internals in a GT6 or Vitesse box has been a popular conversion for many years - my GT6 has one that I fitted in 1994 and my Vitesse has one the previous owner fitted in 1990. There are two benefits of the 1850 bits: it takes a J-type overdrive, which is stronger than the D-type, and the mainshaft tip bearing is bigger (and hence stronger) than the one that often fails on the original box. In fact, that was why my first Vitesse got such a conversion in 1989. So, whatever John says about it not being original, it's possible that clutch plate has been in your car for thirty years! Link to comment Share on other sites More sharing options...
johny Posted June 26, 2019 Report Share Posted June 26, 2019 3 hours ago, JohnD said: Gods, Miles, that is WORN! Can't be original, so someone has been riding the clutch! JOhn Funny I was going to say it doesn't look very worn as you can still the original surface. Difficult to tell from a photo how far off the rivets it is but I know even a brand new plate doesn't have a lot of meat on it.... Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 27, 2019 Report Share Posted June 27, 2019 There is a dimension in the manauls , need to nip it firmly in a vice to compress the wavy disc 7.6mmm comes to mind Diaphragm disc is thinner then a coil cover disc .at 8.3mm One reason why they cannot be mix and match, The wear in the photo look like its a bit dished , which can happen if overheated at some time Pete Link to comment Share on other sites More sharing options...
JohnD Posted June 27, 2019 Report Share Posted June 27, 2019 It was the unevenness that struck me, thank you, Pete. Of course, it could be original to the car that the GB came from! John Link to comment Share on other sites More sharing options...
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