Hicks Posted August 14, 2020 Author Report Share Posted August 14, 2020 On 29/07/2020 at 15:22, SpitFire6 said: What GT6 rear is it? What ratio diff? Cheers, Iain. PS Nice car. I like they have been able to use a spit bonnet. I'll be 100% honest - I don't know the answer to either of these questions and I wouldn't know how to find out! Is there a way I can find this information out easily? James Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 14, 2020 Report Share Posted August 14, 2020 rear end. if the drive shaft has a rubber coupling near the hub end its rotaflex if its a drive shaft just goes till it disappears into the rear hub bearing block its a swing axle that does for a simple start as for engine manuals there is little difference in the basics between 2000/ 2500 so either manual will give you most clues apart from some obvious dimensional changes for diff ratio push car for 1 wheel rotation and count the turns of the propshaft ( I leave you to work how you do that ) if you turn wheels on a jack turn both exactly one turn the same or you get silly results let us know what count you get Pete Link to comment Share on other sites More sharing options...
SpitFire6 Posted August 14, 2020 Report Share Posted August 14, 2020 4 hours ago, Hicks said: I'll be 100% honest - I don't know the answer to either of these questions and I wouldn't know how to find out! Is there a way I can find this information out easily? James Hi James, The diff would be a 3.89 or a 3.63 or a 3.27. If you have a speed GPS app on your phone; Drive a constant speed like 60MPH for example and note RPM in 4th gear Without overdrive energised if fitted, Goto http://www.mintylamb.co.uk/gearspeed/ Input your rear tyre size. You can input one of the above ratio's or just select spitfire1500 or both GT6's. Match your engine RPM to speed and you have found your diff. If you cannot drive the car you will need to get under it If under it, look for rubber doughnuts or any CV's. Measure the rear track. Only useful if you have OEM wheels. The above information will confirm your rear end if it is Triumph. I don't think there is a quicker way? PS. You could use your car speedo, but it could be inaccurate or out of calibration. Tacos are normally pretty good. Nice with refried beans. RPM gauge is normally believable. 3.27 is my preferred diff for a spit2500. Best for the motorway. Cheers, Iain. Link to comment Share on other sites More sharing options...
thescrapman Posted August 14, 2020 Report Share Posted August 14, 2020 You really only need a GT6 Haynes manual. The few remaining differences will be obvious, or just ask here. PI sounds better when on the driveway revving it by the way... 🙂 Link to comment Share on other sites More sharing options...
SpitFire6 Posted August 14, 2020 Report Share Posted August 14, 2020 I have GT6, Spitfire & TR6 Haynes manuals. Link to comment Share on other sites More sharing options...
Hicks Posted August 14, 2020 Author Report Share Posted August 14, 2020 5 hours ago, SpitFire6 said: Hi James, The diff would be a 3.89 or a 3.63 or a 3.27. If you have a speed GPS app on your phone; Drive a constant speed like 60MPH for example and note RPM in 4th gear Without overdrive energised if fitted, Goto http://www.mintylamb.co.uk/gearspeed/ Input your rear tyre size. You can input one of the above ratio's or just select spitfire1500 or both GT6's. Match your engine RPM to speed and you have found your diff. If you cannot drive the car you will need to get under it If under it, look for rubber doughnuts or any CV's. Measure the rear track. Only useful if you have OEM wheels. The above information will confirm your rear end if it is Triumph. I don't think there is a quicker way? PS. You could use your car speedo, but it could be inaccurate or out of calibration. Tacos are normally pretty good. Nice with refried beans. RPM gauge is normally believable. 3.27 is my preferred diff for a spit2500. Best for the motorway. Cheers, Iain. Ok thanks Iain! When I've got the car back I'll have a look - I know the RPM and Speedo are both actually pretty much bang on so shouldn't be too difficult! Can do Pete's method above as well to clarify :). I'm trying to remember off the top of my head what it used to run at but it's been such a long time since I bombed it down the motorway.. I feel like it used to sit at around 3000 at 70, but that was with OD engaged.. Can't remember.. Also now I want tacos - I made refried beans for the first time a couple of days ago and they were extremely tasty (if I may say so myself). Link to comment Share on other sites More sharing options...
Hicks Posted August 14, 2020 Author Report Share Posted August 14, 2020 5 hours ago, thescrapman said: You really only need a GT6 Haynes manual. The few remaining differences will be obvious, or just ask here. PI sounds better when on the driveway revving it by the way... 🙂 Does it now 👀👀👀👀👀👀👀👀👀 Interesting. My housemate has an old BMW from the 80s that has some sort of injection system in it - I'm not sure what he's done to it but the smell that comes out of that car 😂. You can't drive behind him 'cause you just end up getting dizzy. Link to comment Share on other sites More sharing options...
Hicks Posted August 14, 2020 Author Report Share Posted August 14, 2020 4 hours ago, SpitFire6 said: I have GT6, Spitfire & TR6 Haynes manuals. And that covers your set up ok :)? You have the same set up right :)? (just been looking at your site) Link to comment Share on other sites More sharing options...
thescrapman Posted August 15, 2020 Report Share Posted August 15, 2020 11 hours ago, Hicks said: Does it now 👀👀👀👀👀👀👀👀👀 Interesting. My housemate has an old BMW from the 80s that has some sort of injection system in it - I'm not sure what he's done to it but the smell that comes out of that car 😂. You can't drive behind him 'cause you just end up getting dizzy. Same with. PI, plenty of unburnt fuel if it isn't set up correctly. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted August 15, 2020 Report Share Posted August 15, 2020 20 hours ago, Hicks said: Also now I want tacos - I made refried beans for the first time a couple of days ago and they were extremely tasty (if I may say so myself). I just wish they weren't called that... reminds me of reheated leftovers. What's fer lunch? Ah'm gonna refry last night's beans.... I too have a non-overdrive diff running a J-type overdrive... very relaxing on long runs. When it all works. Some good basic stuff on diffs here: http://gt6mk2.com/differential.html Link to comment Share on other sites More sharing options...
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