billie Posted April 11, 2019 Report Share Posted April 11, 2019 Has anyone got a wiring diagram for a logic switch on a A type gearbox? Quote Link to post Share on other sites
RogerH Posted April 11, 2019 Report Share Posted April 11, 2019 Hi Billie, welcome to the forum. Yes. But!!!! TR Revington in Somerset do a logic box and a momentary on toggle switch. Not cheap but works. I have made my own logic box and use an old overdrive switch converted to a push button. Cheap and works. Are you able to make things, solder, invent etc etc. Roger Quote Link to post Share on other sites
Hamish Posted April 11, 2019 Report Share Posted April 11, 2019 (edited) I searched the “how to fit one” wiring. Didnt realise it was to make one. Here is the fitting instructions http://crislor.de/TR/FI006 logic device1.doc This is to buy a revington one https://www.revingtontr.com/product.asp?productid=rtr1001k&affiliateid= And some random eBay product. Triumph TR6, Stag, 2500 Overdrive Logic Controller https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F254177349279 H Edited April 11, 2019 by Hamish Sp Quote Link to post Share on other sites
Grahamgl Posted April 11, 2019 Report Share Posted April 11, 2019 If you are up for making your own overdrive controller go to www.worldphaco.net. You will find instructions how to make one and how it is wired into the overdrive circuit. I have made one for each of my TRs, both have A type overdrives and they work very well. Each one cost me less than a tenner. Thoroughly recommended. Graham Quote Link to post Share on other sites
Tim D. Posted April 11, 2019 Report Share Posted April 11, 2019 I have just fitted the "random eBay product" and it works great. Tim Quote Link to post Share on other sites
SteveB21 Posted April 12, 2019 Report Share Posted April 12, 2019 +1 for the eBay product. Fitted one to my TR6 a couple of years ago. Easily fitted and works well. Cheers Steve Quote Link to post Share on other sites
DRD Posted April 12, 2019 Report Share Posted April 12, 2019 2 hours ago, SteveB21 said: +1 for the eBay product. Fitted one to my TR6 a couple of years ago. Easily fitted and works well. Cheers Steve Where does this unit go, under the bonnet? cheers Daz Quote Link to post Share on other sites
cvtrian Posted April 12, 2019 Report Share Posted April 12, 2019 That ebay overdrive logic controller is made by one of our CVTR members, he is an electronics whiz! Ian Quote Link to post Share on other sites
Tim D. Posted April 12, 2019 Report Share Posted April 12, 2019 Fits in the foot well Quote Link to post Share on other sites
Hamish Posted April 12, 2019 Report Share Posted April 12, 2019 2 hours ago, cvtrian said: That ebay overdrive logic controller is made by one of our CVTR members, he is an electronics whiz! Ian Wish I’d known Quote Link to post Share on other sites
SteveB21 Posted April 12, 2019 Report Share Posted April 12, 2019 Mine is fitted under the dash, under the tacho, with the LED warning light fitted into the H frame - see photo (it is the orange light between the fan override switch and my immobiliser LED. If I recall correctly, you can access the instructions from the eBay ad. Cheers Steve Quote Link to post Share on other sites
DRD Posted April 12, 2019 Report Share Posted April 12, 2019 50 minutes ago, SteveB21 said: Mine is fitted under the dash, under the tacho, with the LED warning light fitted into the H frame - see photo (it is the orange light between the fan override switch and my immobiliser LED. If I recall correctly, you can access the instructions from the eBay ad. Cheers Steve Ok thanks Steve. Quote Link to post Share on other sites
Steves_TR6 Posted April 12, 2019 Report Share Posted April 12, 2019 I quite fancy one of these, but am a little confused..... you engage overdrive with the standard switch, say in 3rd gear you change up to 4th, the unit disengages overdrive you want to rengage overdrive, but the switch is still set to ‘on’ do you have to switch ‘off’ then back ‘on’ again ? steve Quote Link to post Share on other sites
RogerH Posted April 12, 2019 Report Share Posted April 12, 2019 Hi Steve, the Revington box uses a momentary on switch in place of the standard switch. Mine has a montary puch button on a stalk in place of the standard switch The Ebay item does say that the push button is included - how it is fitted I do not know, Roger Quote Link to post Share on other sites
RogerH Posted April 12, 2019 Report Share Posted April 12, 2019 Hi Steve, the Google instructions state that you have to move the standard on and off !!! When the controller has disengaged the overdrive the overdrive on-off switch must be moved to the off position before the overdrive can be re-engaged. That is a bit of an inconvenience. Roger Quote Link to post Share on other sites
Steves_TR6 Posted April 12, 2019 Report Share Posted April 12, 2019 30 minutes ago, RogerH said: Hi Steve, the Google instructions state that you have to move the standard on and off !!! When the controller has disengaged the overdrive the overdrive on-off switch must be moved to the off position before the overdrive can be re-engaged. That is a bit of an inconvenience. Roger Thanks Roger and what happens when you park up, having left the switch ‘on’ but the overdrive is ‘off’ next time you drive off and engage 2nd/3rd is the overdrive on or off?? steve Quote Link to post Share on other sites
SteveB21 Posted April 12, 2019 Report Share Posted April 12, 2019 Hi all Tim_trinda who builds the eBay unit is on the forum, so you can drop him a note. Also, this has been discussed quite a bit on the forum, so worth a search. Hope that helps. cheers Steve Quote Link to post Share on other sites
foster461 Posted April 12, 2019 Report Share Posted April 12, 2019 I have had Tim's logic controller in my TR6 for a very long time and using the standard OD switch. It is not an inconvenience to have to move the OD switch to the off position before the OD can be re-engaged again. Usually what happens is I change gear, remember that I was in OD and move the switch to off. I installed the controller behind the side trim in the footwell and the idiot light LED in the central dash support. I love this thing. Stan Quote Link to post Share on other sites
c.hydes Posted April 13, 2019 Report Share Posted April 13, 2019 I looked at all the overdrive logic unit options in some detail and eventually fitted one brought from Tim Walker in preference to the Revington unit. He also is an electronics engineer(and owns a TR I believe). Its a small module and can be fitted anywhere, and has an option for wiring as a momentary switch which I think is better. I removed the stalk switch and wired an illuminated momentary switch in the top of the gear knob. Press the switch once to engage overdrive in 3rd and 4th. Press again to disengage. It will automatically disengage the overdrive firstly when you go through the gate if you forget to hit the switch. But, what I really like is if you want to change without disengaging overdrive simple hold down the momentary switch whilst changing gear and it stays in overdrive. Of course it automatically disengages overdrive if you go to 2nd, 1st or more importantly reverse as the gearbox selector switches prevent this happening. It comes with a blue LED and protection diode to indicate that the overdrive module has switched, but I added additionally protection circuitry and another LED across the actual overdrive solenoid to check that it actually pulls-in and drops- out. Can share all my wiring/ circuitry if anyone is interested, and other contact details for Tim Walker? Tim Walker: www.triumph-tr6.co.uk Cheers, Colin. Quote Link to post Share on other sites
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