iggy Posted February 28, 2020 Share Posted February 28, 2020 I have a J type overdrive box with 21A76 stamped on the near side boss where the cross shaft arm is, on the opposite side on the casing is the raised numbers 8830681286, can any one identify this gearbox thanks Quote Link to comment Share on other sites More sharing options...
glang Posted February 28, 2020 Share Posted February 28, 2020 Is there another number stamped on the bell housing the other side by where the starter motor goes? Quote Link to comment Share on other sites More sharing options...
thescrapman Posted February 28, 2020 Share Posted February 28, 2020 Gavin what size input shaft? there are 4 boxes it could be Stag big input shaft and bulge somewhere to show it has the better layshaft big saloon small input shaft sprint longer small input shaft TR big input shaft Quote Link to comment Share on other sites More sharing options...
iggy Posted February 28, 2020 Author Share Posted February 28, 2020 Quoted from glang- Is there another number stamped on the bell housing the other side by where the starter motor goes? yes the number is mk7211 looks to me hand stamped Quote Link to comment Share on other sites More sharing options...
iggy Posted February 28, 2020 Author Share Posted February 28, 2020 Quoted from thescrapman- Gavin what size input shaft? there are 4 boxes it could be Stag big input shaft and bulge somewhere to show it has the better layshaft big saloon small input shaft sprint longer small input shaft TR big input shaft Colin it was removed from a saloon il look to see if it has the bulge somewere Quote Link to comment Share on other sites More sharing options...
glang Posted February 28, 2020 Share Posted February 28, 2020 from what I can see looks like MK is from a 4 cylinder 4 synchro TR.... Quote Link to comment Share on other sites More sharing options...
iggy Posted February 28, 2020 Author Share Posted February 28, 2020 Quoted from glang- from what I can see looks like MK is from a 4 cylinder 4 synchro TR.... could well be, the mk7211 number is hand stamped and looks to new for an original marking, Quote Link to comment Share on other sites More sharing options...
glang Posted February 28, 2020 Share Posted February 28, 2020 well they were all hand stamped but that should have been well over 50 years ago! However I cant see someone stamping it up with an invented number like that. The ratios seemed to stay the same right up to 1971 when the unit was aligned with the stronger Stag boxes although I think even then the ratios only changed slightly.... Quote Link to comment Share on other sites More sharing options...
iggy Posted February 28, 2020 Author Share Posted February 28, 2020 Quoted from glang- well they were all hand stamped but that should have been well over 50 years ago! However I cant see someone stamping it up with an invented number like that. The ratios seemed to stay the same right up to 1971 when the unit was aligned with the stronger Stag boxes although I think even then the ratios only changed slightly.... ok didnt realise they were all hand stamped, i think possibly the original number stamped has been filed down and re stamped as it looks shiney compaired to the rest, agree with the ratio's only really slight differences Quote Link to comment Share on other sites More sharing options...
glang Posted February 28, 2020 Share Posted February 28, 2020 Just cant see someone stamping it with that number (if it was a recon it should be GR----) unless they were so worried about originality that they replaced a gearbox and wanted to keep matching numbers.... Quote Link to comment Share on other sites More sharing options...
thescrapman Posted March 1, 2020 Share Posted March 1, 2020 MK is later Mk2 2000 I think Quote Link to comment Share on other sites More sharing options...
glang Posted March 1, 2020 Share Posted March 1, 2020 Looks like thats on the right track according to this site: https://triumph2000register.co.uk/the-cars/technical-specifications/ Quote Link to comment Share on other sites More sharing options...
iggy Posted March 2, 2020 Author Share Posted March 2, 2020 yeah it seems like its from a mk2 according to the 2000 register, probly some one cleaned up the area its stamped not filed it down, Quote Link to comment Share on other sites More sharing options...
glang Posted March 2, 2020 Share Posted March 2, 2020 strange though as MK looks like late MK2 2.5TC or MK2 2.5S and not a PI as you have although I see theres no gearbox code listed for a facelift MK2 2.5PI.... Quote Link to comment Share on other sites More sharing options...
iggy Posted March 2, 2020 Author Share Posted March 2, 2020 glang this gearbox didnt come out of my car i did a swap for it, also my cars not on the lucas injection system the previous owner removed it Quote Link to comment Share on other sites More sharing options...
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