harlequin Posted May 22, 2017 Report Share Posted May 22, 2017 The latest job on my tatty but running TR3A is the brakes and I have now got to the calipers. I have removed the drivers side caliper, its the solid type and it will require a rebuild, so on to the near side and WTF its a split type?? With two of the bolts that hold the thing together missing, a bit scary but it is a project (with continuous MOT's going back years). Now to my question I understand that an Austin Rover caliper is a straight replacment for the Girling item, http://www.tr3a.info/Net_calipers.htm does anyone know if its a worthwhile change and from what car it comes from. George Quote Link to post Share on other sites
Richardtr3a Posted May 23, 2017 Report Share Posted May 23, 2017 I had the same problem. I sent both calipers away for restoration but can not remember where. I will have a search through the old files later. They have been on the car for many years and there is no problem. Good luck and don't worry. Richard & H. Quote Link to post Share on other sites
harlequin Posted May 23, 2017 Author Report Share Posted May 23, 2017 I have been offered a offside split calliper so that I have a matched pair, and Past parts have given a quote to refurb but I thought this may be an opportunity to upgrade a bit. I suppose the brakes are good from standard so its not a common thing to make the change. George Quote Link to post Share on other sites
RogerH Posted May 23, 2017 Report Share Posted May 23, 2017 Hi George, If your wallet has been bothering you recently - to fat to fit into back pocket - then you can kill two birds with one stone. TRShop sell new calipers - TR4A are apprx £50; TR3 are apprx £150 (what is the difference). It is like a diet - losing all those pounds. Roger Quote Link to post Share on other sites
stuart Posted May 23, 2017 Report Share Posted May 23, 2017 TRShop sell new calipers - TR4A are apprx £50; TR3 are apprx £150 (what is the difference). Roger Considerable difference! Late ones are easily available, repro early ones have only just become available and tooling costs must have been considerable. Stuart. Quote Link to post Share on other sites
harlequin Posted May 23, 2017 Author Report Share Posted May 23, 2017 Hi Rodger I like your take on dieting I shall try to explain it to my wife if she ever finds the credit card statement, but I doubt if she'd fall for it. The £50 for TR4A calipers is extremely good value and as Stuart said tooling cost for the TR3 part must be massive in relation to the small number of cars, so it's good that companies are willing to take the risk. George Quote Link to post Share on other sites
BlueTR3A-5EKT Posted May 23, 2017 Report Share Posted May 23, 2017 I do not think a TR3 caliper at £150.00 is excessively priced. A Ford Modeo front caliper will cost you about £90.00 https://www.onlineautomotive.co.uk/Ford_Mondeo_Rear%20Brake%20Calipers.aspx Peter W Quote Link to post Share on other sites
roy53 Posted May 23, 2017 Report Share Posted May 23, 2017 what cost for a rebuild of the TR3 early calipers from past parts etc. Quote Link to post Share on other sites
TomMull Posted May 23, 2017 Report Share Posted May 23, 2017 Hi George, If your wallet has been bothering you recently - to fat to fit into back pocket - then you can kill two birds with one stone. TRShop sell new calipers - TR4A are apprx £50; TR3 are apprx £150 (what is the difference). It is like a diet - losing all those pounds. Roger I am also trying to sort front brakes and I'm not at all clear on the differences. According to Moss, caliper "A" TR3 from TS13046 to TR3A TS56376, was used with 11 inch rotors and had the one piece casting with connector pipe."B" calipers with two piece castings were used after that. So question 1, Was the casting difference the only difference andre the calipers interchangeable? (I assume that they are from the question above). Then, it would seem that there was another change, basically with the TR4 and some TR3Bs. This change included going from 11 to 10 3/4 rotors and a corresponding change in the geometry of the caliper I assume. Second question then: Could one simply change the rotors (also readily available and cheap) and calipers to the later style together or are there other differences? Tom Quote Link to post Share on other sites
harlequin Posted May 23, 2017 Author Report Share Posted May 23, 2017 Roy Past Parts quoted £ 65 + vat and a turn around time of 2 to 3 weeks, they did a good job on my MG TDs master cylinder that's why I tried them 1st Tom I could not spot a reason for them not to be interchangeable and the TR shop advert stated that their split calipers will fit an early car with minor changes. I guess I am about to find out when my offside caliper arrives. George Quote Link to post Share on other sites
stuart Posted May 23, 2017 Report Share Posted May 23, 2017 (edited) Early car caliper mounting bracket is different for "A&B" type calipers with the larger discs to later "C" type calipers with the smaller discs. Also different pipe runs and flexis. FWIW The flexis for type "B" calipers are hard to come by as they need a very short solid section at the caliper or the clearance is wrong. I had to get some specially made a couple of years ago to fit "B" type calipers on an Italia. Stuart. Edited May 23, 2017 by stuart Quote Link to post Share on other sites
Alec Pringle Posted May 23, 2017 Report Share Posted May 23, 2017 Many years ago I tried running a 'A' caliper on one front wheel and a 'B' on the other . . . . . not a good move, try as I might I could not achieve really even braking between the two wheels. The difference in operation is small, but it appeared to me to be there, and I sure as heck wouldn't wish to argue the toss with an insurer or the bobbies in the event of an accident situation . . . . . I have in the past assisted the police as an 'expert witness' after a TR fatality, you might well be amazed at the thoroughness with which they examined the fine detail of the remains of the car in question, and the number of questions which they raised as a result. Don't chance it would be my advice - brakes and wheels/tyres alike, absolutely consistent across the axle. Cheers Alec Quote Link to post Share on other sites
harlequin Posted May 23, 2017 Author Report Share Posted May 23, 2017 Alec I completely agree tyres and brakes must be completely right along with steering, electrics................. My TR3 had a few issues with the brakes apart from the mismatched calipers, I found the brake line to the near side front was plumbed into the brake light switch port on the 5 way connector and consequently touching the tubular exhaust manifold. You have to wonder why Next job is rear brakes I wonder what surprises await! George Quote Link to post Share on other sites
TwinCamJohn Posted May 27, 2017 Report Share Posted May 27, 2017 (edited) I have had good work on servos from Past Parts so imagine their brake work is good , too. Had calipers for my Escort TwinCam refurbished at BiggRed. Very good service, too. Edited May 27, 2017 by TwinCamJohn Quote Link to post Share on other sites
oldtuckunder Posted May 27, 2017 Report Share Posted May 27, 2017 Had calipers for my Escort TwinCam refurbished at BiggRed. Very good service, too. +1 super quality refurb work Alan Quote Link to post Share on other sites
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