Joanna K Posted October 22, 2021 Report Share Posted October 22, 2021 Hi I am currently in the process of rebuilding gearbox on my triumph to fix the noises that it makes on the 2nd and 3rd gear. How bad does this look to you? Link to comment Share on other sites More sharing options...
Joanna K Posted October 22, 2021 Author Report Share Posted October 22, 2021 Thanks Matthew for a prompt response! I believe it’s the same part, Canley’s shows it as 1st/2nd Hub part no. 156911 (Unfortunately No longer available) Link to comment Share on other sites More sharing options...
johny Posted October 22, 2021 Report Share Posted October 22, 2021 Joanna, I take it the idler gear that engages with that hub has similar wear and also how does the laygear reverse gear look? Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 22, 2021 Report Share Posted October 22, 2021 just to say thats reverse it can go on a long time in that worn chipped condition as reverse is a pretty slow little used gear compared to others( its obviously not at its best ) it has no effect on noises in 2nd /3rd thats more likey layshaft bearings and mainshaft tip wear are there any synchro problems ?? places like moss list just the sleeve + 33tooth £106 you must count your teeth there are various counts out there Pete Link to comment Share on other sites More sharing options...
Joanna K Posted October 22, 2021 Author Report Share Posted October 22, 2021 More bad news for me tonight. The mainshaft is toast, and as predicted by you guys - the reverse gear is chipped Link to comment Share on other sites More sharing options...
Joanna K Posted October 23, 2021 Author Report Share Posted October 23, 2021 Morning Matthew 👋 it’s a non-overdive gearbox. I contacted a local engineering business to ask if they could repair the manifold, fingers crossed they will be able to do it somehow. Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 23, 2021 Report Share Posted October 23, 2021 whats the layshift spindle like ? any synchro problems ?? Pete Link to comment Share on other sites More sharing options...
Joanna K Posted October 23, 2021 Author Report Share Posted October 23, 2021 8 minutes ago, Pete Lewis said: whats the layshift spindle like ? any synchro problems ?? Pete Hi Pete the layshaft also needs replacing, but I have one ready to be fitted Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 23, 2021 Report Share Posted October 23, 2021 as thats its looking like at some time in life its had a low oil level , which started this off both this and the mainshaft tip are common weak points after all these years and rely on good lubrication its worth looking inside the cluster as the needles can transmit that wear problem to the cluster bore surface a zone often overlooked as for synchro it relies heavily on the chamfered teeth angles of around 55deg on the dog teeth of the gear the sleeve and the baulkring to baulk the change whith 1/2 tooth rock over before the gears sync speed and engagement is continued without clashing heres a Rootes explaination needs colouring in but it says how the clutch is spun up to speeds in the blink of an eye when you yank the gear stick Link to comment Share on other sites More sharing options...
Joanna K Posted October 23, 2021 Author Report Share Posted October 23, 2021 19 minutes ago, Pete Lewis said: as thats its looking like at some time in life its had a low oil level , which started this off both this and the mainshaft tip are common weak points after all these years and rely on good lubrication its worth looking inside the cluster as the needles can transmit that wear problem to the cluster bore surface a zone often overlooked as for synchro it relies heavily on the chamfered teeth angles of around 55deg on the dog teeth of the gear the sleeve and the baulkring to baulk the change whith 1/2 tooth rock over before the gears sync speed and engagement is continued without clashing heres a Rootes explaination needs colouring in but it says how the clutch is spun up to speeds in the blink of an eye when you yank the gear stick Thank you Pete, Very helpful Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 23, 2021 Report Share Posted October 23, 2021 do you have a dummy spindle made to aid reassembly of the cluster needles and the new spindle ??? if not cut the old one down to the length of the cluster and keep it for future use Pete Link to comment Share on other sites More sharing options...
daverclasper Posted October 23, 2021 Report Share Posted October 23, 2021 6 hours ago, Pete Lewis said: its worth looking inside the cluster as the needles can transmit that wear problem to the cluster bore surface a zone often overlooked My cluster was mullered, though ok enough, for it to be machined and a sleeve fitted. Mike Papworth did this along with other work on my G.B Link to comment Share on other sites More sharing options...
Joanna K Posted October 23, 2021 Author Report Share Posted October 23, 2021 5 hours ago, Pete Lewis said: do you have a dummy spindle made to aid reassembly of the cluster needles and the new spindle ??? if not cut the old one down to the length of the cluster and keep it for future use Pete I took the old one with a circular temporary piece of wood, but I will reuse the old layshaft for dummy spindle Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 23, 2021 Report Share Posted October 23, 2021 anything of a close diameter works , Ive had to use a bit of hose once to get someone out of trouble when no tooling was with me Pete are you doing the rebuild plenty of simple tips to make it easy Pete Link to comment Share on other sites More sharing options...
Joanna K Posted October 23, 2021 Author Report Share Posted October 23, 2021 Yes, it is now a full rebuild. just trying to make it quieter. I purchased the gearbox kit from Canleys to start with, but my needy yet beautiful car demands more bits. also a refurbished propshaft is on its way i like the story about the hose! Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 24, 2021 Report Share Posted October 24, 2021 when it comes to rebuild let us know lots ways to do it in the shed nothing special is needed at all a good mallet and punch and a plastic bag to put the hubs in so you can strip the sleeves and catch the escaping balls and springs and how to up end the re assy so the collet thrusts between 2nd dont keep falling out its simpluze just ask always use a new 3rd gear circlip , get a few spares if it gets spread when fitting bin and do again you dont want one to pop off Pete Link to comment Share on other sites More sharing options...
johny Posted October 24, 2021 Report Share Posted October 24, 2021 Wow looks like you caught it just in time as if a needle bearing fails completely major damage can follow. Hope your laygear bearing surfaces are good as its not easy to repair these or the mainshaft tip. The latter is difficult because as Mathew says it can be sleeved but that means machining the tip even smaller which makes it more prone to snapping off. Somebody on here recently bought a new mainshaft from Bastuck in Germany (they may also supply UK stockists) and had some big problems with it... Link to comment Share on other sites More sharing options...
Joanna K Posted October 24, 2021 Author Report Share Posted October 24, 2021 Thank you guys for your support. The whole process is rather interesting but really enjoying it (not money spending part). I contacted a local specialist engineering guy to see if he could repair the mainshaft, if not I will probably get one from Rimmers Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 24, 2021 Report Share Posted October 24, 2021 is this gearbox overdrive TKC923 or non overdrive 213018 that you need the non OD is getting hard to find Pete Link to comment Share on other sites More sharing options...
Joanna K Posted October 24, 2021 Author Report Share Posted October 24, 2021 9 minutes ago, Pete Lewis said: is this gearbox overdrive TKC923 or non overdrive 213018 that you need the non OD is getting hard to find Pete It’s non OD TKC533 - for mk3 Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 24, 2021 Report Share Posted October 24, 2021 when adding up the costs bear in mind TD Fitchetts exchange box is £425 (incl vat) as advertised in Couriers may not be the best but you get a warranty of sorts Mike Papworth ( advert in courier ) is best in the trade but has a waiting list just a thought Pete Link to comment Share on other sites More sharing options...
Joanna K Posted October 24, 2021 Author Report Share Posted October 24, 2021 Cheers Pete, I thought about it as well, however as I have the gearbox in pieces I will see it through and enjoy the process. Mathew supported me with some extra gears, and only need a mainshaft now Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 24, 2021 Report Share Posted October 24, 2021 just had a look and ive got one its used but sound as they come does that help a few beers and postage ?? Pete 1 Link to comment Share on other sites More sharing options...
Joanna K Posted October 24, 2021 Author Report Share Posted October 24, 2021 48 minutes ago, Pete Lewis said: just had a look and ive got one its used but sound as they come does that help a few beers and postage ?? Pete Very much Pete! Link to comment Share on other sites More sharing options...
johny Posted October 24, 2021 Report Share Posted October 24, 2021 What did the laygear bearing surfaces look like Joanna? They usually last better than the layshaft but if this is the boxes second rebuild might now have worn through the case hardening meaning that the wear rate accelerates😢 Link to comment Share on other sites More sharing options...
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