mishmosh Posted June 1, 2015 Report Share Posted June 1, 2015 Hmm. Had the d type in 20 odd yrs. works great. When it works. However it has always been a little slow to engage now even slower and often doesnt. Especially when working hard at motorway speeds. Drained it and changed the oli which was very clean with no bits. I assume solonoid adjustment ? Any tips ? Link to comment Share on other sites More sharing options...
Darren Groves Posted June 2, 2015 Report Share Posted June 2, 2015 Have a read of this:http://www.canleyclassics.com/technical-archive/the-d-type-overdrive 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 2, 2015 Report Share Posted June 2, 2015 some things to check now ,youve done the oil levels. take off the tunnel remove the plate on the drivers side operate the OD the lever inside is pulled a short distance by the solenoid Yes ? NO check 12v is at the short solenoid feed wire YES ?? NO check the 3rd 4th inhibitor switch is working, check the relay is clicking if solenoid pulls the arm you will see there's a 3mm? hole in it , when operated push a drill through this hole it should line up with a similar hole in the main case, if this is out of line adjust the nut on the solenoid shaft till its all lined up. solenoids do suffer from corrosion, can be a pig to get at the lower fixing to remove it and clean the plunger and its bore there is a switch on the end of the solenoid which once engaged reduces the coil amps from 10 down to a holding coil of about 0.5 amp these switches can fail, most are sealed not repairable. when all this drives you mad remove the hex cap nut on the top of the case gallery inside is a spring and small ball and the spool valve with a very fine hole down its length make sure the bore in the valve 'tube'is clear its through this little orifice the pressure is controlled think that will do for a start, Oh dont forget some strong tea laced with something happy Pete 1 Link to comment Share on other sites More sharing options...
mishmosh Posted June 2, 2015 Author Report Share Posted June 2, 2015 Thanks. I can hear it clicking in so am confident that power is there. Wll try the lining up first. To be honest I am thinking for the sake of £40 buying and fitting a new unit. Then setting it up. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 2, 2015 Report Share Posted June 2, 2015 a ha!!! first you have to get at the bottom screw may need to jack up the unit a bit or............... remove the chassis Hmm !!!!! if you do..... get some allen key/socket cap screws as you can get a long extenion on with a hex bit ... makes for easy next time i would look first and not buy till you have two, check the setting , if its out a bit its a simple and cheap adjustment Pete Link to comment Share on other sites More sharing options...
mishmosh Posted June 2, 2015 Author Report Share Posted June 2, 2015 Thanks for the advice. Hope to see you at donington. Naf 738f Link to comment Share on other sites More sharing options...
Gully Posted January 13, 2016 Report Share Posted January 13, 2016 I have a similar issue apparently developing to that outlined above, but with slight differences as outlined below... The D type overdrive on my GT6 has started engaging slowly, or struggling to engage under load. If I take the load off the drivetrain it engages smoothly and quickly, staying engaged under all conditions without slipping. My first thought was that the oil level in the gearbox was low (it does leak), but having checked it and topped up a little as required (100ml), the problem remains. I'm guessing it's a tunnel out and check the solenoid throw and clean the filters as the next step, unless anyone has any other pearls of wisdom? Many thanks, Gully Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 14, 2016 Report Share Posted January 14, 2016 Think youre on the right track also take the vavle plug off the top pull it out check very small hole down the spool is clear pete Link to comment Share on other sites More sharing options...
Gully Posted January 14, 2016 Report Share Posted January 14, 2016 Thanks Pete. One for a warmer spring day as I need a new tunnel seal anyway! Gully Link to comment Share on other sites More sharing options...
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