Clive Posted November 13, 2018 Report Share Posted November 13, 2018 You could do what a friend did. Cut the 2 input shafts, and weld what you need together. OK, not quite as simple as it sounds, but if you have somebody who can to the matchining (male on one part, tight interference fit into a drilling on the other, and then weld with runout kept within factory spec) and it will live. Not sure I would do it to a six cylinder car, but a 4 is OK. He has done almost 100K like that. 1 Link to comment Share on other sites More sharing options...
Darren Groves Posted November 13, 2018 Author Report Share Posted November 13, 2018 The 3 rail input shaft I have is needed, as the 3 rail 'box will be going into my Herald at some point in the future, the single rail into the Spitfire project. The correct input shafts seem to be available, so if this is all that is needed to make it fit then I'll just have to go that route. Not the end of the world, I picked up the Gearbox for a good price and expected to have to spend money on it to get it sorted. Darren Link to comment Share on other sites More sharing options...
JumpingFrog Posted November 13, 2018 Report Share Posted November 13, 2018 http://www.teglerizer.com/triumphstuff/spit_and_gt6_specs.htm Says that YD is 1500 RWD 1975 on, with internals the same as Dolly 1850, although not sure if that extends to the input shaft as well. Be aware that this would give you a close ratio gearbox (GT6 ratios), with first being at 2.66:1 instead of the usual 3.5:1. Although I'm sure Mike will advise you on whats best. 1 Link to comment Share on other sites More sharing options...
68vitesse Posted November 13, 2018 Report Share Posted November 13, 2018 Just looked at the to input shafts I have same lenghth, different size mainshaft tip bearing and different syncro ring needed. The fine input shaft needs the later thin ring same external size but bigger hole to fit the bigger cone on the shaft. Think some of the later coarse spline shafts also used the later syncro ring. Regards Paul 1 Link to comment Share on other sites More sharing options...
Nick Jones Posted November 13, 2018 Report Share Posted November 13, 2018 3 hours ago, JumpingFrog said: http://www.teglerizer.com/triumphstuff/spit_and_gt6_specs.htm Says that YD is 1500 RWD 1975 on, with internals the same as Dolly 1850, although not sure if that extends to the input shaft as well. Be aware that this would give you a close ratio gearbox (GT6 ratios), with first being at 2.66:1 instead of the usual 3.5:1. Although I'm sure Mike will advise you on whats best. 1500 and 1850 internals are not the same. While casing, shafts and change mechanism are the same, the gearsets are different with different ratios. The 1850 being the same close ratio gearing as the GT6 and Vitesse and also TR7 4 speed. There are other variations within the extended BL family, especially Marina and Ital which I'm not familiar with. Nick 2 Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 13, 2018 Report Share Posted November 13, 2018 I purchased a slave 3 rail for some odd parts, someone had spent a lot of money making a repair with a mixture of single rail parts A disaster , probably why it was in a heap at TRGB , it really confirms some look similar but there was some real rattling good fit hubs on the mainshaft and unmatched reverse idler and sleeve tooth count, heck knows how it ever worked or not The mainshaft tip had been cut bored and a slug fitted..loose, which messed the input (stem gear) bore up Well I kept the cluster and case , not a good buy more goodbye Pete Link to comment Share on other sites More sharing options...
JumpingFrog Posted November 13, 2018 Report Share Posted November 13, 2018 1 hour ago, Nick Jones said: 1500 and 1850 internals are not the same. While casing, shafts and change mechanism are the same, the gearsets are different with different ratios. The 1850 being the same close ratio gearing as the GT6 and Vitesse and also TR7 4 speed. There are other variations within the extended BL family, especially Marina and Ital which I'm not familiar with. Nick Ah yes, I see I've misinterpreted JK's email on that website. So the 1500 RWD is the same as Spitfire/Toledo (which you'd expect). Process of elimination, might help: Marina 1300 input shaft has a change in diameter just before the splines (taken from eBay) so it's not that: TR7 is very very long, see this comparison, Spit right, GT6 middle, TR7 right: So that leaves 1850 Dolly or Marina 1800. This is a comparison of Spitfire and 1850 from this forum thread (https://www.triumphexp.com/phorum/read.php?8,1460769) : I'd say that the one you have is longer than the 1850 in this picture. So that leaves Marina 1800? Unless some machining has already been done. Either way, I'm interested to know what Mike says it actually is so do keeps us informed. 1 Link to comment Share on other sites More sharing options...
dave.vitesse Posted November 13, 2018 Report Share Posted November 13, 2018 Not the 1850 Dolly. What about the 1300/1500 FWD Saloon? Dave Link to comment Share on other sites More sharing options...
68vitesse Posted November 13, 2018 Report Share Posted November 13, 2018 Is this of any interest or use. Regards Paul Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 13, 2018 Report Share Posted November 13, 2018 Cant see it being any FWD they had a removable stem so you could change the clutch without dropping the tranmission Just needed a slide hammer to pop the shaft out from the case An idea copied by vauxhall cavalier and astra Pete 1 Link to comment Share on other sites More sharing options...
Darren Groves Posted November 14, 2018 Author Report Share Posted November 14, 2018 The good news is that Mike has confirmed it's a 1500 Gear set in there with a completely random input/first motion shaft, so easily sorted by fitting the correct one. Mike just needs to see the laygear to ensure it's correctly matched and we can the sort what we need. Darren 1 Link to comment Share on other sites More sharing options...
dave.vitesse Posted November 14, 2018 Report Share Posted November 14, 2018 The input shaft - It's not the 1850 Dolly as the earlier version used the Vitesse/GT6 three rail box. So the length would be the same and its close ratio. If the gear set is wide ratio then it may indeed be a Marina. Maybe a 1.3 Litre. Interesting stuff. Dave Link to comment Share on other sites More sharing options...
68vitesse Posted November 14, 2018 Report Share Posted November 14, 2018 Delt with Mike Papworth when two teeth broke of the third gear on the gear cluster in my Vitesse gearbox last year, very helpful and knowledgeable. Gear box was and is a mixture, fine input shaft with J type overdrive and three rail selector. Regards Paul Link to comment Share on other sites More sharing options...
dave.vitesse Posted November 14, 2018 Report Share Posted November 14, 2018 Yes Mike has an in depth knowledgeable of Triumph gearbox and axles. He did all John Kipping's back in the 1980's/1990's. And also does Rotoflex rebuilds. Dave Link to comment Share on other sites More sharing options...
Ben Caswell Posted November 14, 2018 Report Share Posted November 14, 2018 4 hours ago, Darren Groves said: The good news is that Mike has confirmed it's a 1500 Gear set in there with a completely random input/first motion shaft, so easily sorted by fitting the correct one. Mike just needs to see the laygear to ensure it's correctly matched and we can the sort what we need. Darren Its quite possible the input shaft was from a Marina box as quite a few Marina based kit cars including the Marlin had Triumph overdrive gearbox conversions done this way and needed the longer input shaft as they kept the deeper Marina bell housing. If its 20 splines its from a 1300 Marina and 23 splines is from either a 1800Marina or a 1700 Ital. 1 Link to comment Share on other sites More sharing options...
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