Fredr Posted May 18, 2022 Report Share Posted May 18, 2022 Reconnected the gearshift lever, replaced sheared pin with ss bolt. Now shifts 3,4 and reverse. Cant find 1 and 2. Thoughts? Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 19, 2022 Report Share Posted May 19, 2022 i see you have a 78 spitfire is this a 1500 with single rail gearbox ??? like this Top Cover, Selector Shaft and Forks : Canley Classics Pete Link to comment Share on other sites More sharing options...
johny Posted May 19, 2022 Report Share Posted May 19, 2022 yes and a little more information on the work youve done on the gearbox and why plus the symptoms you now have - does the lever move into first and second position but theres no drive or is it that the lever wont even go there? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 19, 2022 Report Share Posted May 19, 2022 8 hours ago, Fredr said: Reconnected the gearshift lever, replaced sheared pin with ss bolt. Now shifts 3,4 and reverse. Cant find 1 and 2. Thoughts? If it's 3 rail have you put the bolt at the base of the lever in back to front? It has to go one way otherwise it'll hit the side of the casing and you can't get gears - if it's both 1st and 2nd it seems likely. If it's single-rail, disregard. Link to comment Share on other sites More sharing options...
NonMember Posted May 19, 2022 Report Share Posted May 19, 2022 1 hour ago, Colin Lindsay said: otherwise it'll hit the side of the casing I thought that 3-rail-specific issue meant you don't get fourth. 1st/2nd is the middle of a 3-rail, so not a problem with that bolt. If it's a single rail then 1st/2nd is the left side of the gate, but they don't have that bolt. However... 9 hours ago, Fredr said: replaced sheared pin with ss bolt it's probably very important to know exactly which pin was replaced here, because that sounds like a mod that might cause the problem. Link to comment Share on other sites More sharing options...
Fredr Posted May 19, 2022 Author Report Share Posted May 19, 2022 Single rail gearbox. The lever shifts to 3rd, 4th and reverse but physically will not move to the left to get 1st or 2nd. Not wanting to get into the gearbox to insert a new pin I bored an opening and put a stainless steel bolt in place of the pin (RZ1216). The pin was found to have disintegrated which uncoupled this joint. Is it possible that the bolt with nut are interfering with the play of the shifter? It is very difficult to see in there but it looked as if there was enough space. Link to comment Share on other sites More sharing options...
NonMember Posted May 19, 2022 Report Share Posted May 19, 2022 49 minutes ago, Fredr said: Is it possible that the bolt with nut are interfering with the play of the shifter? I'd say more than possible - most likely, in fact. The factory designed it to have a split-pin that doesn't protrude AT ALL on either side. You've got a big nut and a washer on the side that's going to hit the casing when you try to get to the 1st/2nd plane. Link to comment Share on other sites More sharing options...
Fredr Posted May 19, 2022 Author Report Share Posted May 19, 2022 Not wanting to get into the gearbox to Link to comment Share on other sites More sharing options...
johny Posted May 19, 2022 Report Share Posted May 19, 2022 One observation: what does that plate do that looks as if it slides in further at the base of the gear lever housing? Is it meant to bolt up hard up against the housing and would that make any difference? Link to comment Share on other sites More sharing options...
Fredr Posted May 19, 2022 Author Report Share Posted May 19, 2022 It was tight when I first started the project. I loosened it to work on the bolt. After tightening it up again it really reduced the play of the gearshift. I am sure it needs to be tightened..but that was going to be my next question, what is its function. Link to comment Share on other sites More sharing options...
NonMember Posted May 19, 2022 Report Share Posted May 19, 2022 50 minutes ago, johny said: what does that plate do that looks as if it slides in further at the base of the gear lever housing? Is it the interlock that forces you to lift the gearlever to get it in reverse? Link to comment Share on other sites More sharing options...
Fredr Posted May 19, 2022 Author Report Share Posted May 19, 2022 I believe it is the interlock, however when I tightened it the shifter was very difficult to move at all. Something is not right in that area?? Link to comment Share on other sites More sharing options...
johny Posted May 19, 2022 Report Share Posted May 19, 2022 yes I think as you tighten the reverse interlock plate it pushes the lever over more so causing the new nut you have installed to come up against the inside of the housing☹️ Im afraid the selector rod needs an alternative fixing method.... Link to comment Share on other sites More sharing options...
Fredr Posted May 19, 2022 Author Report Share Posted May 19, 2022 You folks are great. Replaced bolt with a pin. Tightened the interlock plate. Now it is shifting as it should! Thank you, now on to the brakes. 1 Link to comment Share on other sites More sharing options...
johny Posted May 19, 2022 Report Share Posted May 19, 2022 Good news, out of interest what type of pin did you use and hows it held in place? Link to comment Share on other sites More sharing options...
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