Hamish Posted July 23, 2021 Author Report Share Posted July 23, 2021 Update i know you are as intrigued as me ( well May be not !?) as to what was found. Tom at https://petecoxsportscars.co.uk has been true to his word and opened the box and started to strip it and sent me some annotated pics this is the first look closely and you may just see - with a trained eye and experience - the minor defect. Answers on a post card as they used to say. !!! Quote Link to post Share on other sites
boxofbits Posted July 23, 2021 Report Share Posted July 23, 2021 9 minutes ago, Hamish said: Update i know you are as intrigued as me ( well May be not !?) as to what was found. Tom at https://petecoxsportscars.co.uk has been true to his word and opened the box and started to strip it and sent me some annotated pics this is the first look closely and you may just see - with a trained eye and experience - the minor defect. Answers on a post card as they used to say. !!! Hi Hamish Would that have been caused indirectly by broken thrust washer? Kevin Quote Link to post Share on other sites
Hamish Posted July 23, 2021 Author Report Share Posted July 23, 2021 Just now, boxofbits said: Hi Hamish Would that have been caused indirectly by broken thrust washer? Kevin they think that yes this is where it started. but don't say anything Kevin see if the others can spot the issue ? Quote Link to post Share on other sites
BlueTR3A-5EKT Posted July 23, 2021 Report Share Posted July 23, 2021 (edited) That failure happened to me on a borrowed LHD TR6 once. Which top-hat bush was fitted at this repair? The one piece brass as orig (129939) or the two piece bush and washer (129939X) from Stag? Peter W Edited July 23, 2021 by BlueTR3A-5EKT Quote Link to post Share on other sites
Hamish Posted July 23, 2021 Author Report Share Posted July 23, 2021 4 hours ago, BlueTR3A-5EKT said: That failure happened to me on a borrowed LHD TR6 once. Which top-hat bush was fitted at this repair? The one piece brass as orig (129939) or the two piece bush and washer (129939X) from Stag? Peter W Originally I don’t know Peter they are rebuilding as robustly as they can. this is as taken out compared to what should be. Quote Link to post Share on other sites
Lebro Posted July 23, 2021 Report Share Posted July 23, 2021 Ouch ! Bob Quote Link to post Share on other sites
RogerH Posted July 23, 2021 Report Share Posted July 23, 2021 Hi Hamish, I assume Pete & Tom have spares. If they haven't I may have some used ones(but with their teeth) Roger Quote Link to post Share on other sites
Hamish Posted July 23, 2021 Author Report Share Posted July 23, 2021 1 minute ago, RogerH said: Hi Hamish, I assume Pete & Tom have spares. If they haven't I may have some used ones(but with their teeth) Roger Thanks Roger Tom was confident they had what they needed. but thank you ( I’m also really impressed with the pics Tom did. Looks like he has a no shadow light box) I have to say they have been so supportive and helpful. Quote Link to post Share on other sites
ntc Posted July 23, 2021 Report Share Posted July 23, 2021 There are others that know how to build a proper track gearbox Quote Link to post Share on other sites
Hamish Posted July 23, 2021 Author Report Share Posted July 23, 2021 4 minutes ago, ntc said: There are others that know how to build a proper track gearbox I’m sure there are Neil and I have considered close ratio, dog box, other ratios, stag box etc etc had off the cuff estimates for serious money too. but for now the value to me is the quality of service, the competency of the work, time frame and supporting small business that keep us TR’ers on the road from someone I know and trust. Quote Link to post Share on other sites
ntc Posted July 24, 2021 Report Share Posted July 24, 2021 18 hours ago, Hamish said: I’m sure there are Neil and I have considered close ratio, dog box, other ratios, stag box etc etc had off the cuff estimates for serious money too. but for now the value to me is the quality of service, the competency of the work, time frame and supporting small business that keep us TR’ers on the road from someone I know and trust. Let’s see how it goes and if it is up to the job and doesn’t leak. Quote Link to post Share on other sites
David Owen Posted July 29, 2021 Report Share Posted July 29, 2021 (edited) On 7/23/2021 at 4:48 PM, Hamish said: Originally I don’t know Peter they are rebuilding as robustly as they can. this is as taken out compared to what should be. Can someone please explain how the laygear and the actual 2nd gear function during operation? Thank you. Edited July 29, 2021 by David Owen Quote Link to post Share on other sites
Lebro Posted July 29, 2021 Report Share Posted July 29, 2021 drive from the engine enters the gearbox (via the clutch) on a shaft with a gear on it. That gear is in permanent mesh with the first of a series of gears mounted on the countershaft. Thus the countershaft, & all the gears on it are rotating all the time the clutch is engaged. The main shaft is the one which carries drive to the rear axle (via overdrive if fitted) On the main shaft are a number of gears which are in constant mesh with the corresponding gears on the countershaft, but, they are not locked to the mainshaft, but are free to rotate on it. In between 1st & 2nd, & 3rd & 4th gears are "Synchro hubs" these rotate with the mainshaft, & have a sliding outer part, which can moved to overlap, & engage with the mainshaft gears, thus locking them (one at a time !) to the mainshaft. The exception is reverse, for this an "idler" gear is moved along a short shaft to connect a spur gear on the countershaft to a spur gear on the mainshaft. Hope that helps ! Bob. Quote Link to post Share on other sites
Hamish Posted July 29, 2021 Author Report Share Posted July 29, 2021 Glad you are here to explain Bob !! well I “popped” down to Redditch to collect my box at lunch time and just arrived back home. There was some queuing on the m5 and m6!! but tomorrow I will be trying to refit my box /od to the car. Thanks to Pete and Tom for a quick turn around. he has been studying my videos and suggests a non od close ratio set up………. but that will have to wait a season or so now All this is either a good or poor use of time off work ?!,!? perhaps mike has an hour to share in the morning ? Quote Link to post Share on other sites
iain Posted July 29, 2021 Report Share Posted July 29, 2021 Goods news H , hope the refit goes well. Iain Quote Link to post Share on other sites
Lebro Posted July 29, 2021 Report Share Posted July 29, 2021 Do you think the strap between the mount & the gear stick base helps ? Bob. Quote Link to post Share on other sites
Hamish Posted July 29, 2021 Author Report Share Posted July 29, 2021 11 minutes ago, Lebro said: Do you think the strap between the mount & the gear stick base helps ? Bob. Dunno Bob. But surely can’t hinder. Pete put it back on the rebuild. is it not factory ? It’s an early tr6 box. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted July 29, 2021 Report Share Posted July 29, 2021 The strap was fitted to reduce noise from the remote. Not sure about effectiveness. My car has had once since I bought it in ‘75 and I have swapped it to replacement gearboxes throughout my ownership. Peter W Quote Link to post Share on other sites
Nigel C Posted July 29, 2021 Report Share Posted July 29, 2021 sorry, did someone say noise reduction...didn't quite hear as I have a ringing in my ears (for the last 30 years) never seen it on any of my gearboxes and certainly Pete has never fitted one to mine Quote Link to post Share on other sites
brenda Posted July 30, 2021 Report Share Posted July 30, 2021 I have one on my TR4a.. Mike Redrose group Quote Link to post Share on other sites
Z320 Posted July 30, 2021 Report Share Posted July 30, 2021 (edited) Did you have rattle noises from the lever? Do you know the post with AndyR100's recommendation about? Simply browse "rattle" and look for his post (can't link that on my smartphone) Good luck, Marco Edited July 30, 2021 by Z320 Quote Link to post Share on other sites
Hamish Posted July 30, 2021 Author Report Share Posted July 30, 2021 7 hours ago, Nigel C said: never seen it on any of my gearboxes and certainly Pete has never fitted one to mine Nigel don’t feel bad it was what was already on the box. Not something Pete specially supplied. it’s only a large washer with a bit of flat bar welded at right angles. Bolts to G/B mount and up to the selector. Quote Link to post Share on other sites
Ian Vincent Posted July 30, 2021 Report Share Posted July 30, 2021 58 minutes ago, Hamish said: it’s only a large washer with a bit of flat bar welded at right angles. That sounds like a home made version. I have one on my box that I bought from Pete Fenlon, it’s fabricated from a single bent piece of flat bar. Rgds Ian Quote Link to post Share on other sites
BlueTR3A-5EKT Posted July 30, 2021 Report Share Posted July 30, 2021 Genuine factory items were one piece. The item was redesigned and swapped sides when the J type overdrive arrived on TR6 and is a twisted metal strap that fits between the RH gear lever fix bolt and an overdrive casing stud/nut. Quote Link to post Share on other sites
David Owen Posted July 30, 2021 Report Share Posted July 30, 2021 19 hours ago, Lebro said: drive from the engine enters the gearbox (via the clutch) on a shaft with a gear on it. That gear is in permanent mesh with the first of a series of gears mounted on the countershaft. Thus the countershaft, & all the gears on it are rotating all the time the clutch is engaged. The main shaft is the one which carries drive to the rear axle (via overdrive if fitted) On the main shaft are a number of gears which are in constant mesh with the corresponding gears on the countershaft, but, they are not locked to the mainshaft, but are free to rotate on it. In between 1st & 2nd, & 3rd & 4th gears are "Synchro hubs" these rotate with the mainshaft, & have a sliding outer part, which can moved to overlap, & engage with the mainshaft gears, thus locking them (one at a time !) to the mainshaft. The exception is reverse, for this an "idler" gear is moved along a short shaft to connect a spur gear on the countershaft to a spur gear on the mainshaft. Hope that helps ! Bob. Thanks Bob! Another newb puzzle solved. Quote Link to post Share on other sites
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