Phil Read Posted June 12, 2019 Report Share Posted June 12, 2019 The overdrive on my 73 CR series TR6 engages and then jumps out, some times it will engage again before again jumping out.The oil level in the gearbox is correct. has any one any ideas on what to look at? Thanks in advance. Quote Link to post Share on other sites
Paul Hill Posted June 12, 2019 Report Share Posted June 12, 2019 (edited) My J Type overdrive was doing the same, topped up the oil, it was not a lot, but as it works on oil pressure just made sure it was dead right I was told to check the connections to the Solanoid and also check if the earth is good, after doing all of that it’s now fine. Edited June 12, 2019 by Paul Hill Quote Link to post Share on other sites
Nigel Triumph Posted June 12, 2019 Report Share Posted June 12, 2019 Sounds like a weak solenoid perhaps, or poor electrical connections to the solenoid. I would try cleaning all the electrical connectors in the O/D circuit first. If that doesn't help, suspect a dodgy solenoid. Nigel Quote Link to post Share on other sites
rcreweread Posted June 12, 2019 Report Share Posted June 12, 2019 Phil - you should have a J type unit which are usually more mechanically reliable than a A type so I would expect it to be an electrical issue - so check solenoid and earth connections as Phil has suggested, but also check your inhibitor switch is working properly ( someone recently suggested swapping it with your reversing light switch - they are the same) and that your column switch connections are good and not shorting out anywhere Cheers Rich Quote Link to post Share on other sites
RogerH Posted June 12, 2019 Report Share Posted June 12, 2019 Also have a look at the rubber boot at the bottom of the gearstick. This can cause the gearstick to be pushed towards neutral. Roger Quote Link to post Share on other sites
Steves_TR6 Posted June 12, 2019 Report Share Posted June 12, 2019 My similar symptoms were caused by loose/dirty connections check the lucar connections on the solenoid and the drivers footwell connections to the gearbox switches. steve Quote Link to post Share on other sites
Phil Read Posted June 13, 2019 Author Report Share Posted June 13, 2019 Ok Thanks I will try the electical connections. I have just collected it from having a new hood fit and the overdrive just kept jumping in and out all the time. Quote Link to post Share on other sites
Steves_TR6 Posted June 13, 2019 Report Share Posted June 13, 2019 2 hours ago, Phil Read said: Ok Thanks I will try the electical connections. I have just collected it from having a new hood fit and the overdrive just kept jumping in and out all the time. Sounds electrical to me :-) Quote Link to post Share on other sites
Stagpowered Posted June 13, 2019 Report Share Posted June 13, 2019 I have the overdrive switch on the gearstick on mine, and the switch ended up making intermittent contact after many years of use. Gave exactly these symptoms, almost certainly electrical. Neil Quote Link to post Share on other sites
Phil Read Posted August 14, 2019 Author Report Share Posted August 14, 2019 I finally had time to sort the problem. I fit a secondhand solenoid and that has solved the problem. Quote Link to post Share on other sites
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