jagnut66 Posted April 30, 2021 Report Share Posted April 30, 2021 Hi, I have found a Herald and hope to pick it up very soon, in the meantime I have been putting together a few spares etc. I have managed to get hold of a spoked (banjo) steering wheel I am have refurbished and hope to fit. The horn push that came with it is the same, so another good spare there, however I need to know what size the nut is that holds the steering wheel in place (I prefer to use a socket rather than the old hammer and chisel method😄). Also I have spotted a diff for a 1360 on eBay, for a good price, will this be an improvement on the standard 1200 diff (for motorway work / longer journeys) or isn't it worth the bother? Thanks and best wishes, Mike. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 30, 2021 Report Share Posted April 30, 2021 All Herald are specified as a 4.11:1 diff so dont bother if you want to improve cruising look for a spitfire 3.63:1 diff works well with 1200 we have a local car with this and its a good call . there can be two stg wheel nuts 15/16" and 1- 1/16 AF ( thats from memory) PART NUMBER https://www.canleyclassics.com/?catalogue=triumph-herald-1200&diagram=triumph-herald-1200-steering Link to comment Share on other sites More sharing options...
jagnut66 Posted April 30, 2021 Author Report Share Posted April 30, 2021 Thanks Pete. I shall have to find a spitfire 3.63:1 diff then, time to start perusing the classifieds. I shall also check my sockets to make sure I have both those sizes ready. Best wishes, Mike. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 30, 2021 Report Share Posted April 30, 2021 its a good few years since i had my Vit6 so hope the memory is close def never the hammer and punch and the horn push 3 legged spider clip can be a faf , always fit the horn (pencil) with the brass brush to the column ring and the soldered end up to the button or it wears quick and flies apart there are two pencil lengths available Link to comment Share on other sites More sharing options...
Colin Lindsay Posted April 30, 2021 Report Share Posted April 30, 2021 Plus - if removing the steering wheel do NOT completely undo the nut; take it right to the end of the threads and then loosen the wheel on the splines. This way, if it requires force to move it, it won't fly off, especially if you're sitting in the driver's seat pulling it and get it right between the eyes when it flies off.... Link to comment Share on other sites More sharing options...
jagnut66 Posted April 30, 2021 Author Report Share Posted April 30, 2021 Thanks for the advice. Hopefully the horn won't cause too many issues. I've never had a moggy steering wheel do that but there's always a first time. Best wishes, Mike. Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 30, 2021 Report Share Posted April 30, 2021 or the telescopic/collapsible slip joint is loose and you pull the inner column out/up ( column height is adjustable after a fashion ) Pete Link to comment Share on other sites More sharing options...
jagnut66 Posted April 30, 2021 Author Report Share Posted April 30, 2021 5 hours ago, Pete Lewis said: if you want to improve cruising look for a spitfire 3.63:1 diff works well with 1200 There's a Spitfire mk4 3.89 diff being advertised? Or is this a step too far? If so I'll keep looking for the one you suggested. Best wishes, Mike. Link to comment Share on other sites More sharing options...
johny Posted May 1, 2021 Report Share Posted May 1, 2021 A 3.89 offers a ratio between the one fitted and the 3.63. I think that would be a good compromise as you dont want to lose too much acceleration do you? Also it would fit correctly as it has the 6 mounting holes for the spring rather than the 4 used on the other (although it might be possible to swop casings)... With any diff the hard part is to get a good s/h (or even reconditioned!) one as the seals can leak and, worse, gears/bearings whine. The front seal is the most likely to be worn and fortunately the easiest to change but noise can be very difficult and expensive to cure. To try to buy a quiet diff without hearing it running all you can do is check it turns smoothly but with some resistance, has a small amount of backlash and inspect the internal gears. Some suppliers will offer to replace it if theres a problem but it could be a lot of hassle and I dont know how this guarantee works😳 Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 1, 2021 Report Share Posted May 1, 2021 remember a spitfire diff may have only 4 stud holes for the 6 spring studs if its from a later spit with a swing spring box but drill 8.3mm and tap 3/8unf is easy even with a battery drill just use the top 6 hole plate as a jig and i would see how you get on and get to know the car more then decide if a major unit needs a change final drive ratios matter if you drive 2 up you can go higher than the 4.11 if you drive 4 up and a boot full of goodies needs a carefull thought its the 1st gear hill start ability you have to consider more than motorway cruising the local 1200 with a 3.63 does about 1000 a month and mainly 2 up and shopping in the boot its fine and he lives on a hill so theres stud holes to consider and you have 4.11 3,89 3,63 and 3,27 you will have to change the front coupling to match your propshaft see some more clues https://www.canleyclassics.com/?archive=different-differentials Pete Link to comment Share on other sites More sharing options...
jagnut66 Posted May 1, 2021 Author Report Share Posted May 1, 2021 Thanks Johny / Pete, This is the one I saw: https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwi29_f7hKjwAhUKsO0KHX06AbEYABAOGgJkZw&ae=2&ohost=www.google.com&cid=CAESQeD25jOJKfDKktc8OdmCe1NJI0aNtQ3IryKsPuZO5zFHgYcUSx44P0i-iIzl6JKFUmdrGGypJEPNmxo67mKTxL9c&sig=AOD64_3waRTEW7zowQkN6DRf5RHRSsrUrA&ctype=5&q=&ved=2ahUKEwjm2fD7hKjwAhXCoFwKHVjMAp0Q9aACegUIARCAAQ&adurl= Best wishes, Mike. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 1, 2021 Report Share Posted May 1, 2021 there you go its a 4 hole diff so need two more stud holes adding or you swap cases and a coupling swap ( its is from a IV swing spring onwards ) it has a castle nut on the coupling so its not collapsible spacer'd preload so its provenence is buyer beware it most unlikey to be 3.89 :1 or 3.63 all early and spitfire IV was 4.11:1 only the 1500 was 3.63:1 the only spit with a 3.89:1 (FH)was sold as 1500 in north america theres a lot of very mixed clues about mkIV ratios some do list FH as 3.89 others 4.11 ( and you have to read in the US market spec) leave you to pick the bones out of that the Triumph factory parts list for MK IV shows as 4.11:1 the std ratio for UK you need to drive what you have and why go out buying unkown parts on a whim there will be many other bits and bobs you will need first and a good understanding of the mix and wont match triumph parts bin Pete Link to comment Share on other sites More sharing options...
jagnut66 Posted May 1, 2021 Author Report Share Posted May 1, 2021 mmmmm...... Given what you've said, the essance of which, if I understand correctly, is that I could very well end up with the same diff ratio that I already have, I think I will leave this one then and look for one that is known to come from a 1500. I am in no hurry. Will there be trade / car boot stands at the combined Triumph / MG weekend later in the year? I do like a good rummage....... 😄 Best wishes, Mike. Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 1, 2021 Report Share Posted May 1, 2021 thats a sensible plan we have all rushed in and found a big Oops!!! in the equation no hurry is better . gives time to be sure youre homework stacks up Pete Link to comment Share on other sites More sharing options...
johny Posted May 1, 2021 Report Share Posted May 1, 2021 2 hours ago, Pete Lewis said: there you go its a 4 hole diff so need two more stud holes adding or you swap cases and a coupling swap ( its is from a IV swing spring onwards ) it has a castle nut on the coupling so its not collapsible spacer'd preload so its provenence is buyer beware it most unlikey to be 3.89 :1 or 3.63 all early and spitfire IV was 4.11:1 only the 1500 was 3.63:1 the only spit with a 3.89:1 (FH)was sold as 1500 in north america theres a lot of very mixed clues about mkIV ratios some do list FH as 3.89 others 4.11 ( and you have to read in the US market spec) leave you to pick the bones out of that the Triumph factory parts list for MK IV shows as 4.11:1 the std ratio for UK you need to drive what you have and why go out buying unkown parts on a whim there will be many other bits and bobs you will need first and a good understanding of the mix and wont match triumph parts bin Pete Think youre a bit off there Pete as thatll be an FH and 3.89 as indicated by the seller who offers a lot of diffs for sale. However youre right about the coupling and the number of casing holes as 3.89 comes in 4 and 6 hole flavours. This seller asks rather high prices for unreconditioned diffs so presumibly will give a refund on a noisy one (guess who pays the postage though?).... Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 1, 2021 Report Share Posted May 1, 2021 it depends where you look for what ratio is FH even the parts list gives various vibes as to when 4.11 and 3.89 were fitted to which country under the FH suffix hopefully someone has done a coupling rotational count Link to comment Share on other sites More sharing options...
johny Posted May 1, 2021 Report Share Posted May 1, 2021 Ha ha if they have got the ratio wrong is doesnt hold out much hope for the state of the diff😆 Link to comment Share on other sites More sharing options...
DanMi Posted May 1, 2021 Report Share Posted May 1, 2021 If you do change the diff spit mk4 and 1500 had larger flanges on both the input and outputs, so you would need to change the front flange or rear prop flange. Plus the output shafts and I think the 1200 used small output shafts so wouldn't fit, which would mean changing the half shaft flanges to the larger later ones, not really a difficult job though. 1 Link to comment Share on other sites More sharing options...
DanMi Posted May 1, 2021 Report Share Posted May 1, 2021 spit mk4 in the UK was definitely 3.89 Link to comment Share on other sites More sharing options...
jagnut66 Posted May 10, 2021 Author Report Share Posted May 10, 2021 A thought has occurred to me that on Morris Minor diffs there are identifying numbers stamped into the casing, are there any on Triumph diffs? If so, what is the identifying mark for a 3-63:1 diff? Is there a list of identifying numbers for diffs on here? Many thanks, Mike. Link to comment Share on other sites More sharing options...
Clive Posted May 10, 2021 Report Share Posted May 10, 2021 https://www.canleyclassics.com/?archive=different-differentials http://www.wolfitt.com/numbers_and_ratios.htm 3.63 is FR Link to comment Share on other sites More sharing options...
jagnut66 Posted May 11, 2021 Author Report Share Posted May 11, 2021 Thanks for that. Useful information and noted. Best wishes, Mike. Link to comment Share on other sites More sharing options...
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