goldenvtr Posted December 21, 2017 Share Posted December 21, 2017 got my m3 gearbox setup on the road now( getrag 420g) but the ratios far to short, so i need a taller diff. 3.3 would be ideal but im not 100% whats available. currently running a01b lsd which i can p/x or i can buy outright whats available ?? Link to comment Share on other sites More sharing options...
blythmrk Posted December 22, 2017 Share Posted December 22, 2017 Keron is advertising a UK big case B04B (auto) diff but am unsure of the ratio although he says it's ok for manual and autos? Link to comment Share on other sites More sharing options...
goldenvtr Posted December 22, 2017 Author Share Posted December 22, 2017 Keron is advertising a UK big case B04B (auto) diff but am unsure of the ratio although he says it's ok for manual and autos? just took a look but thinks it'll be too pricey once i''ve changed everything else to accommodate it, Link to comment Share on other sites More sharing options...
Mike2JZ Posted December 22, 2017 Share Posted December 22, 2017 If you want a 3.2 diff then you will need to use BO3B or AO3B diff which go for like £1k to 2k. Plus you need the meatier driveshafts to fit as well. 3.7 AO2B (~£450) is what I normally recommend to run on 420g, unless you plan on going 200 mph + Haven't tested it yet, but I've heard that IS220d diff could be made to work without a ton of work and they are even lower ratio than the big case supra diffs Link to comment Share on other sites More sharing options...
goldenvtr Posted December 22, 2017 Author Share Posted December 22, 2017 If you want a 3.2 diff then you will need to use BO3B or AO3B diff which go for like £1k to 2k. Plus you need the meatier driveshafts to fit as well. 3.7 AO2B (~£450) is what I normally recommend to run on 420g, unless you plan on going 200 mph + Haven't tested it yet, but I've heard that IS220d diff could be made to work without a ton of work and they are even lower ratio than the big case supra diffs cool thanks for the input ill have a look into the is diffs, im not afraid of some custom work , i wont be tracking the supra, maybe a drag day for interest but no top speed melarkie am i right in thinking the a01b i currently have is a 3.9? im literally driving round using 4th and 5th lol without even lugging the engine, feel like 2nd gear only just breaches 40mph . with that in mind, id be happy to try a a02b out... any takers for a swap ? Link to comment Share on other sites More sharing options...
Mike2JZ Posted December 22, 2017 Share Posted December 22, 2017 cool thanks for the input ill have a look into the is diffs, im not afraid of some custom work , i wont be tracking the supra, maybe a drag day for interest but no top speed melarkie am i right in thinking the a01b i currently have is a 3.9? Im literally driving round using 4th and 5th lol without even lugging the engine, feel like 2nd gear only just breaches 40mph . With that in mind, id be happy to try a a02b out... Any takers for a swap ? a01b = 4.083:1 Link to comment Share on other sites More sharing options...
goldenvtr Posted December 22, 2017 Author Share Posted December 22, 2017 a01b = 4.083:1 That make more sense thanks:d Link to comment Share on other sites More sharing options...
Recommended Posts