militant-nick Posted September 11, 2016 Share Posted September 11, 2016 Dear all, on the way back from a local show this evening I lost 4th & 5th gears in the militant. Every other gear works fine. I managed to get enough speed in 3rd to put it straight to 6th & run it the last 8 miles back to base. I can now attempt to put the box in 4th or 5th, take my foot off the clutch pedal & the engine runs as though in neutral. When the truck was hot it felt quite loose when trying to select these gears, rest felt normal. With my Dad tonight, we've checked the movement of the selector rod from the bottom of the gear lever to what we think is the 'relay' or 'remote' box bolted to the o/s of the gearbox and it seems fine. Thoughts are that its a part broken within the relay/remote box rather than the gearbox itself (I hope). 4th & 5th gears are in the vertical plane when changing up or down. i welcome thoughts from those in the know. The photo below shows the selector rod coming in from the right cab end of the truck into the small relay or remote box bolted to the gearbox. Regards, Nick Quote Link to comment Share on other sites More sharing options...
paulob1 Posted September 14, 2016 Share Posted September 14, 2016 Dear all, on the way back from a local show this evening I lost 4th & 5th gears in the militant. Every other gear works fine. I managed to get enough speed in 3rd to put it straight to 6th & run it the last 8 miles back to base. I can now attempt to put the box in 4th or 5th, take my foot off the clutch pedal & the engine runs as though in neutral. When the truck was hot it felt quite loose when trying to select these gears, rest felt normal. With my Dad tonight, we've checked the movement of the selector rod from the bottom of the gear lever to what we think is the 'relay' or 'remote' box bolted to the o/s of the gearbox and it seems fine. Thoughts are that its a part broken within the relay/remote box rather than the gearbox itself (I hope). 4th & 5th gears are in the vertical plane when changing up or down. i welcome thoughts from those in the know. The photo below shows the selector rod coming in from the right cab end of the truck into the small relay or remote box bolted to the gearbox. Regards, Nick interested to know what this is... Quote Link to comment Share on other sites More sharing options...
Mk3iain Posted September 14, 2016 Share Posted September 14, 2016 Here are the parts book pages with the selectors, it should help with numbers etc. AEC gbox.pdf Not sure this will work as it is a PDF file? Iain Quote Link to comment Share on other sites More sharing options...
militant-nick Posted September 15, 2016 Author Share Posted September 15, 2016 Thanks Iain, that works & goes nicely with Iain Crosbie's info. I suspect it's the left hand most selector fork on that diagram which has either had the no. 44 screw wind off or no. 51 fork fracture. We will see. Cheers Nick Quote Link to comment Share on other sites More sharing options...
CMP-Phil Posted September 15, 2016 Share Posted September 15, 2016 Hi Interesting thread and problem, hope you will share photos of what you find. Having had similar problems on other old trucks, of loosing a gear of pair of gears it is always a challenge to diagnose the problem until you open the top of box and look in. Glad you are trying to attack the problem from simple to more complex. It is always such a shame to find out that it was something in the linkage out side the gear box after you have the gear box out and on the bench. Again look forward to seeing what the actual problem is. I'm hoping it will be a loose set screw. Cheers Phil Quote Link to comment Share on other sites More sharing options...
militant-nick Posted September 16, 2016 Author Share Posted September 16, 2016 Thanks for the interest & info Gents, always good to hear other folks ideas & learn the correct terminology, I'll halt this chain here and start to update the resto blog on the link below; http://hmvf.co.uk/forumvb/showthread.php?43881-87-ET-77-Militant Quote Link to comment Share on other sites More sharing options...
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