Ian Faulds Posted September 21, 2018 Report Share Posted September 21, 2018 quick question, would a full back brake system ie. drums,shoes, backplates adjusters be able to fit to a late gt6 to replace the gt6 system of auto adjust? I had thought to change it to manual adjust but you cant seem to get the parts to do this either, so I wondered if I could use tr7 bits. anyone tried it? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 21, 2018 Report Share Posted September 21, 2018 Easiest way to do it would be to buy two complete second hand halfshafts with backing plates etc all attached. It probably wouldn't be any more expensive. Link to comment Share on other sites More sharing options...
Ian Faulds Posted September 21, 2018 Author Report Share Posted September 21, 2018 Half shafts won't fit though tr7 are a full axle. Hence wondering if tr7 back plates would be anywhere near a fit. I read before on here of changing to manual adjusters but I've searched and dolomite parts are rare too. I'll have to get a back plate and try. I believe 4speed and 5 are different. I'll cost up back plates. Link to comment Share on other sites More sharing options...
dougbgt6 Posted September 21, 2018 Report Share Posted September 21, 2018 Ian, I fancied doing this, the self adjusters get bent, stop working and can't be re-shaped. Not one of Triumphs best designs! So I thought retro fit earlier mk3 adjustables. The late mk3 has wider drums and shoes plus bigger brake cylinders, which are getting hard to find as this configuration only ran for 9 months. So it might be a good idea, as you say, to change the whole lot? But then there's the servo. They were fitted as standard when the rear brakes were changed and only work on the front wheels. Previously the servo was an option and worked on all four wheels. I think when they beefed up the brakes they found the servo was too much for the rear end so relegated it to the front only. I've actually tried the servo on all four wheels and it does make the braking unbalanced with the late rear brakes. So maybe it'll be easier not to change the drums and shoes, I thought drill the existing back plate and fettle an earlier manual adjuster. Doug Link to comment Share on other sites More sharing options...
Ian Faulds Posted September 21, 2018 Author Report Share Posted September 21, 2018 Mine is a 72 (L) with self adjust brakes but no servo. Well it didn't come with one. I don't think you can drill the backplate to fit the manual adjuster as it won't go opposite the wheel cylinder and you need to have that. The way written on here in a previous post is correct but parts hard to get. Just have to figure out a way round it. Link to comment Share on other sites More sharing options...
poppyman Posted September 21, 2018 Report Share Posted September 21, 2018 If you set the back brakes up right, they work just as well. Have you done any work on the back brakes at all? If not i can guide you through it. Tony. 1 Link to comment Share on other sites More sharing options...
Herald948 Posted September 22, 2018 Report Share Posted September 22, 2018 TR7 brakes are Lockheed, while GT6 are Girling. Whether one can adapt a TR7 backing plate to a late GT6 Mk3 hub, I don't know. To revert a late Mk3 to the earlier GT6 brakes, one would need to go back to a "Mk1" GT6 for the backing plates, etc., as the Rotoflex suspension backing plates won't bolt up to the swing-axle hub. In short, I don't think there's anything inherently "bad" about the late Mk3 brakes other than the occasional difficulty in finding certain bits. Link to comment Share on other sites More sharing options...
Ian Faulds Posted September 22, 2018 Author Report Share Posted September 22, 2018 You both might well be correct. I am thinking in advance. The current set up is OK but spares are difficult. As a maintenance engineer I am always thinking of spares etc and wondering what will fit. Thanks poppy man for your offer of help. I am not at that stage just thinking ahead. The car is a late gt6 non rotoflex. There will be loads of questions to ask you chaps on here. Great advice. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 22, 2018 Report Share Posted September 22, 2018 13 hours ago, Ian Faulds said: Half shafts won't fit though tr7 are a full axle. Sorry Ian, I assumed you knew I meant GT6 halfshafts, as the TR7 doesn't have any. Link to comment Share on other sites More sharing options...
poppyman Posted September 22, 2018 Report Share Posted September 22, 2018 Hi Ian, You could always buy the spares you need in advance and keep them "in stock" as they dont go off and will never loose value. Tony. 1 Link to comment Share on other sites More sharing options...
dougbgt6 Posted September 22, 2018 Report Share Posted September 22, 2018 Ian, I'm confused, (not unusual) You have a 72 GT6? I thought non rotoflex was introduced in February 73 as part of the upgrade I described earlier. Doug Link to comment Share on other sites More sharing options...
Ian Faulds Posted September 22, 2018 Author Report Share Posted September 22, 2018 sorry colin crossed purposes, tony, I do buy spares when I can and if I see them, I guess we all do.of course price has to be right . ha ha . Link to comment Share on other sites More sharing options...
Ian Faulds Posted September 22, 2018 Author Report Share Posted September 22, 2018 hi doug mine is a 72 and chassis numbers and engine numbers match, don't know if its been converted but I have a load of receipts and nothing there. I bought the car 7 years ago, an old guy in middlesbro had bought a job lot from a collector and he was selling the gt6, a mk3 spit and a vitesse. it wasn't running when I bought it. According to the heritage cert it was built October 72, of course it might be a different chasis from a later car but again nothing in the receipts. Link to comment Share on other sites More sharing options...
Ben Caswell Posted September 22, 2018 Report Share Posted September 22, 2018 could you possibly drill a hole in the back plate adjacent to the ratchet on the wheel cylinder and use a screw driver to adjust the brakes.( thinking about it probably not???) Just a thought Then put a grommet in the hole. Link to comment Share on other sites More sharing options...
Nick Jones Posted September 22, 2018 Report Share Posted September 22, 2018 '72 would have be born with rotoflex, so something (quite a lot!) has changed. Anyway, to loose the self adjusters you need the back plates, drums etc from a Mk1 GT6 or Mk1 2LVitesse. These need to be swapped onto the longer GT6 Mk3 driveshafts or you could use a pair of 1500 spit long shafts as a base. This will give you the same braking system as the rotoflex cars and Mk1s have. Quite a lot of effort and expense - you must really hate the self-non-adjusters! Nick Link to comment Share on other sites More sharing options...
dougbgt6 Posted September 22, 2018 Report Share Posted September 22, 2018 Ian, That's interesting. Also as part of the 73 upgrade Sundym glass, cloth seats, gauge needles pointing up, servo and gauges outlined in bright chrome. If you've got those, it's a ringer!! Doug Link to comment Share on other sites More sharing options...
Ian Faulds Posted September 22, 2018 Author Report Share Posted September 22, 2018 it didn't come with a windscreen but the rest is sundym, the seats are cloth, but the needles pointed down, but for me its like a little orphan its here and that's what matters. guess ill never know the wheres and why, but theres a reef of receipts, and ive got what ive got. ill live ok with the self adjusters, it was just a question as to what could fit if I couldn't get spares. Link to comment Share on other sites More sharing options...
Nick Jones Posted September 23, 2018 Report Share Posted September 23, 2018 Pretty sure that the rear brakes are the same as Dolomite (except Sprint) and Toledo. Possibly also TR7 (early 4 speed only), even Marina. Nick Link to comment Share on other sites More sharing options...
poppyman Posted September 23, 2018 Report Share Posted September 23, 2018 On 9/22/2018 at 1:13 PM, Ben Caswell said: could you possibly drill a hole in the back plate adjacent to the ratchet on the wheel cylinder and use a screw driver to adjust the brakes.( thinking about it probably not???) Just a thought Then put a grommet in the hole. I have seen holes drilled in the drum a few times.... Similar to the moggy brakes. Tony. Link to comment Share on other sites More sharing options...
Clive Posted September 24, 2018 Report Share Posted September 24, 2018 8 hours ago, Nick Jones said: Pretty sure that the rear brakes are the same as Dolomite (except Sprint) and Toledo. Possibly also TR7 (early 4 speed only), even Marina. Nick Certainly Toledo and I think 1300 have manual adjusters. I have a toledo..... and use the same brake shoes as Gt6 and Vitesses (except the very last non roto GT6) the 1850's had the self adjusters and used the same shoes as the non roto GT6. The murky bit is the 1500, I am unsure what they were fitted with. Sprints have the self adjusters and huge rear brakes (they had a sensing valve t reduce rear braking). I have a sprint axle on my Toledo, and drilled the drum. Just in case access is required.... (the sprint axle can be converted to manual adjusters, just pick up some TR4 rear brakes. Cheap as chips I expect) Link to comment Share on other sites More sharing options...
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