NCS_TR3A Posted February 15, 2021 Report Share Posted February 15, 2021 OK, nothing major here really. Having finished changing the diff seal and gasket and checking out the prop shaft (ended up changing both UJs as one felt like it was failing) I've moved on to the gearbox mount which has collapsed. Decided to take the tunnel out to do this and ended up. With the gearbox out. Feel the engine is coming out next to be honest as I want to change engine mounts and front crank seal (and if brave enough the rear Crank seal). The gear box has a good smear of oil pretty much every where. Its clear I've had a leak from the rocker cover cork seal. The gearbox worked really well with no issues other than a slight noise from the clutch release bearing when pressed (and I can feel that now that the gearbox is off). I really don't want to get into a gearbox rebuild but I would be interested in which seals can be changed without getting into taking gears out etc. Oh and can anyone identify the gearbox and OD type. It's not the original one that was in the car, it wasn't an OD car originally but I think it's still a TR3 box. Quote Link to post Share on other sites
OldBob Posted February 15, 2021 Report Share Posted February 15, 2021 (edited) Hi ? in your very last photo showing the solenoid wire, look at the top edge of the oval boss in the gearbox casing. Is a TS number stamped into the casting radius? It looks like numbers are there but can't quite make them out Bob Edited February 15, 2021 by OldBob better info Quote Link to post Share on other sites
SeidelVC69 Posted February 15, 2021 Report Share Posted February 15, 2021 Must be a late ( post TS 50000 ) TR3A box with a matching OD. Dieter Quote Link to post Share on other sites
Lebro Posted February 15, 2021 Report Share Posted February 15, 2021 (edited) Tr2 / 3 / 3A gearbox with Type A overdrive. front & rear seals are changable without dismantling the box. No dipstick though, so probably not TR2 Bob. Edited February 15, 2021 by Lebro Quote Link to post Share on other sites
RobTR3 Posted February 16, 2021 Report Share Posted February 16, 2021 You can also change the O ring seals (2), either side of the overdrive operating shaft. Remove adjustment lever R/H side, and solenoid, cover plate L/H side and slide the O rings onto the shaft. Rob Quote Link to post Share on other sites
Drewmotty Posted February 16, 2021 Report Share Posted February 16, 2021 There should be a number stamped into the casing where the cross shaft goes through which will identify the original fitment. Quote Link to post Share on other sites
mikej Posted February 16, 2021 Report Share Posted February 16, 2021 A model number on the OD plate (IRO the selector box casing) prefixed with 22 or 28 et al will identify the exact model and if it is TR type. Given the number I (and many others) will be able to confirm what car it was intended for. Post a picture of the plate? Quote Link to post Share on other sites
stuart Posted February 16, 2021 Report Share Posted February 16, 2021 45 minutes ago, Drewmotty said: There should be a number stamped into the casing where the cross shaft goes through which will identify the original fitment. Not on an original 3syncro box, that’s where the date stamp is, the chassis number is stamped on the side of the g/box casing as in this example pictured below Stuart Quote Link to post Share on other sites
Drewmotty Posted February 16, 2021 Report Share Posted February 16, 2021 Thanks Stuart. Every day is a school day on the Forum. Quote Link to post Share on other sites
NCS_TR3A Posted February 16, 2021 Author Report Share Posted February 16, 2021 Hi, I've taken these photos - Gearbox is TS55455 Date stamp? Is 22 F - 59/. Is that week 22 in 59? And unfortunately the plate on the overdrive is below the gear shift and I cannot read it, or ami looking in the wrong place? Just starting to clean it up and make some decisions on which seals ans gaskets to change. Quote Link to post Share on other sites
OldBob Posted February 16, 2021 Report Share Posted February 16, 2021 Re: overdrive plate, you have found it. My A type overdrive plate attached, this one is without the 22% or 28% prefix number, they don't all have it, depends on the year and original vehicle I believe. Bob Quote Link to post Share on other sites
NCS_TR3A Posted February 20, 2021 Author Report Share Posted February 20, 2021 In the process of cleaning it up its pretty obvious that oil is coming out the selector shafts and so I took the top off which allowed me to take the photo of the overdrive plate. I read the number as 22/1374/009950. I'm now reading the manual to see what seals there are on the select shafts. Having fun in lockdown Neil Quote Link to post Share on other sites
Ralph Whitaker Posted February 21, 2021 Report Share Posted February 21, 2021 (edited) 15 hours ago, NCS_TR3A said: In the process of cleaning it up its pretty obvious that oil is coming out the selector shafts and so I took the top off which allowed me to take the photo of the overdrive plate. I read the number as 22/1374/009950. I'm now reading the manual to see what seals there are on the select shafts. Having fun in lockdown Neil Be warned, read about removing the tapered pins first. I wonder if this is a problem that affects later cars without a dipstick more than early ones with a dipstick. I was thinking maybe the gearbox requires a small breather to prevent pressure build up as the gearbox warms up and the early type may have vented round the cork seal on the dipstick, later boxes use the only available escape route past the seals on the selector rods. Ralph Edited February 21, 2021 by Ralph Whitaker Quote Link to post Share on other sites
Hamish Posted February 21, 2021 Report Share Posted February 21, 2021 This is the breather on my A type 22% without a dip stick Quote Link to post Share on other sites
Drewmotty Posted February 21, 2021 Report Share Posted February 21, 2021 (edited) 53 minutes ago, Ralph Whitaker said: Be warned, read about removing the tapered pins first. I wonder if this is a problem that affects later cars without a dipstick more than early ones with a dipstick. I was thinking maybe the gearbox requires a small breather to prevent pressure build up as the gearbox warms up and the early type may have vented round the cork seal on the dipstick, later boxes use the only available escape route past the seals on the selector rods. Ralph There is a breather Ralph, although it is easily missed. There should be a small hole about 3mm diameter in the top of the front left hand corner of the selector housing.....or maybe that is only on some models? Edited February 21, 2021 by Drewmotty Quote Link to post Share on other sites
NCS_TR3A Posted February 23, 2021 Author Report Share Posted February 23, 2021 On 2/21/2021 at 9:56 AM, Ralph Whitaker said: Be warned, read about removing the tapered pins first. I wonder if this is a problem that affects later cars without a dipstick more than early ones with a dipstick. I was thinking maybe the gearbox requires a small breather to prevent pressure build up as the gearbox warms up and the early type may have vented round the cork seal on the dipstick, later boxes use the only available escape route past the seals on the selector rods. Ralph Hi Ralf, Thanks for the warning. I've read quite a lot over the last few days. I've taken the taper pin out on the clutch fork to allow me to change the front oil seal and the release bearing. I'm struggling a little with the selector shaft. The heads of the tapered pins ar 5/16. There are no holes in mine and therefore no wires. How have people loosened these, I get that a brake spanner fits but I don't physically have room to get the spanner in. Is there something I'm missing? Is there anything I can do to reduce the chance of the pin snapping? I can see the risk I just haven't read anything that tells me how to reduce it. Thanks, Neil Quote Link to post Share on other sites
Ian Vincent Posted February 23, 2021 Report Share Posted February 23, 2021 (edited) You can buy 5/16” square sockets with a 3/8” drive. I recall using a socket brake adjuster that I’ve had for years. Rgds Ian Edited February 23, 2021 by Ian Vincent Quote Link to post Share on other sites
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