Black Forest TR3A Posted July 7, 2020 Report Share Posted July 7, 2020 Yesterday I removed the battery box of my 58 LHD TR3A and now I'm preparing a repro box. There are two holes in the rear bottom left corner of the original box which the repro part doesn't have. When I dismantled the car, the left hole was closed with a rubber piece. all this looks to be original Standard Triumph. Does anyone have an idea which purpose these holes have? The body is for RHD / LHD use (but no holes in the right corner of the box)... Quote Link to post Share on other sites
Ralph Whitaker Posted July 7, 2020 Report Share Posted July 7, 2020 That`s where the overdrive relay mounts if fitted, countersunk screws on battery side. Ralph Quote Link to post Share on other sites
Black Forest TR3A Posted July 7, 2020 Author Report Share Posted July 7, 2020 Ah, excellent! Thank you very much, Ralph. I'm going to install an OD, so I will drill these holes Quote Link to post Share on other sites
BlueTR3A-5EKT Posted July 7, 2020 Report Share Posted July 7, 2020 Do not drill until you have confirmed the hole spacing of the relay you intend to use. Original overdrive relays have differently positioned mounting brackets. Peter W Quote Link to post Share on other sites
ken foster Posted July 7, 2020 Report Share Posted July 7, 2020 5 hours ago, Ralph Whitaker said: That`s where the overdrive relay mounts if fitted, countersunk screws on battery side. Ralph Is that the case for early long door cars would you know please? Quote Link to post Share on other sites
Richardtr3a Posted July 7, 2020 Report Share Posted July 7, 2020 I had problems with the relay and ended up moving it to a safer position and drilling new holes. Good luck Richard & B Quote Link to post Share on other sites
Rodbr Posted July 7, 2020 Report Share Posted July 7, 2020 Hi Ken, The early cars had the same mounting point for the relay. You do need to check the relay you intend to use, make sure the mount is on the side not the end. Rod Quote Link to post Share on other sites
foster461 Posted July 7, 2020 Report Share Posted July 7, 2020 I welded a small plate to the battery box, same location but allowing the OD relay to mount just below the battery box. I liked that better than drilling holes in the new box. Stan Quote Link to post Share on other sites
DavidBee Posted July 7, 2020 Report Share Posted July 7, 2020 Isn't there supposed to be a drain hole in the centre? Quote Link to post Share on other sites
foster461 Posted July 7, 2020 Report Share Posted July 7, 2020 40 minutes ago, DavidBee said: Isn't there supposed to be a drain hole in the centre? Yep, in the bottom of the box, centered left to right but very close to the front of the box. Stan Quote Link to post Share on other sites
foster461 Posted July 7, 2020 Report Share Posted July 7, 2020 One other detail.. On my repro battery box the hold down brackets were made of the same flimsy sheet metal as the box and with round holes. I took them off and used the brackets from the original box. Stan Quote Link to post Share on other sites
stuart Posted July 7, 2020 Report Share Posted July 7, 2020 46 minutes ago, foster461 said: Yep, in the bottom of the box, centered left to right but very close to the front of the box. Stan Only fitted to post TS 1500 or so, early cars didnt have them. Early sidescreen cars also had very flimsy battery locating brackets unlike later ones. Stuart. Quote Link to post Share on other sites
foster461 Posted July 7, 2020 Report Share Posted July 7, 2020 40 minutes ago, stuart said: Only fitted to post TS 1500 or so, early cars didnt have them. Early sidescreen cars also had very flimsy battery locating brackets unlike later ones. Stuart. Good job we have you here keeping is straight Stuart !. Quote Link to post Share on other sites
ianc Posted July 7, 2020 Report Share Posted July 7, 2020 Surely it is better to sit the battery in a purpose-made plastic nappy, so if there should be any acid leakage, it won't eat the bodywork. I'm sure that Moss and others will have such. Ian Cornish Quote Link to post Share on other sites
Ralph Whitaker Posted July 7, 2020 Report Share Posted July 7, 2020 I actually forgot to drill mine and mounted the relay on the dashboard support bracket instead. Plastic battery tray liners are available, but you still need the drain hole for any water that gets in there. Ralph. Quote Link to post Share on other sites
foster461 Posted July 7, 2020 Report Share Posted July 7, 2020 My arrangement with the OD relay on a bracket. Quote Link to post Share on other sites
John McCormack Posted July 10, 2020 Report Share Posted July 10, 2020 On 7/7/2020 at 10:17 PM, Rodbr said: Hi Ken, The early cars had the same mounting point for the relay. You do need to check the relay you intend to use, make sure the mount is on the side not the end. Rod Neither of my TR2s have an od relay. It isn't in the wiring diagram as far as I remember. Quote Link to post Share on other sites
ianc Posted July 10, 2020 Report Share Posted July 10, 2020 Wiring diagram for overdrive appears in "Supplementary Instructions for incorporating overdrive" in the Gearbox Section of the Workshop Manual 502602 - well, it does in my Third Edition (Sixth Printing). Ian Cornish Quote Link to post Share on other sites
stuart Posted July 10, 2020 Report Share Posted July 10, 2020 Or look here for wiring diagram Stuart tr2 and 3 wiring diagram.pdf Quote Link to post Share on other sites
John McCormack Posted July 11, 2020 Report Share Posted July 11, 2020 21 hours ago, ianc said: Wiring diagram for overdrive appears in "Supplementary Instructions for incorporating overdrive" in the Gearbox Section of the Workshop Manual 502602 - well, it does in my Third Edition (Sixth Printing). Ian Cornish You and Stuart are right. The wiring diagram in the Manual doesn't include the od (or relay) but it is all in the TR3 supplementary diagram I have. I wired my TR2 just 18 months ago and had forgotten how I had put it together. Not an unusual occurrence nowadays. The relay on my long door is mounted on the firewall under the dash, near the original position but not under the battery tray. I can't remember where it is on the short door, I wired it in 1983. Quote Link to post Share on other sites
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