v8bobber Posted May 31, 2010 Share Posted May 31, 2010 Hi all, I recently finished building my trialler which I am fairly pleased with. The engine, gearbox and axles were lifted from a 3.9 discovery and as such I find the gearing quite high. I have been offered a transfer box off an early diesel 90 (1.4 ratio?) as compared to the higher geared Disco one, and assumed that this would lower my gearing nicely. However, I have since read in a magazine this evening that this transfer box will only lower the high ratio gearing and will leave the low ratios as they are (if that makes sense?) I can't see it somehow but if someone can enlighten me I would be most appreciative I was under the impression that that 1.4 ratio t box would lower ALL the gears not just the high ratios ones? Dave Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted May 31, 2010 Share Posted May 31, 2010 All LT230 transfer boxes share the same ratio low range gears, it's only the high range gearing which changes. The only way to change both ranges (without altering the main 5-speed box) is to change the ring & pinions in the diffs. Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted May 31, 2010 Share Posted May 31, 2010 Or fit series diffs ? Mo Quote Link to comment Share on other sites More sharing options...
v8bobber Posted May 31, 2010 Author Share Posted May 31, 2010 Thanks for that, i'm glad I asked! It would have been embarrasing to say the least to spend ages swapping the T boxes over the find that the ratios were exactly the same!! I appreciate that changing the ring and piniins would lower the gearing, however, I do wonder if there are any specialist companies that make a set of lowered ratio T gears. I feel a search coming on....... Dave Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted May 31, 2010 Share Posted May 31, 2010 you could always re mortgage!! http://www.ashcroft-transmissions.co.uk/index.php?act=viewCat&catId=10 Quote Link to comment Share on other sites More sharing options...
v8bobber Posted May 31, 2010 Author Share Posted May 31, 2010 you could always re mortgage!! http://www.ashcroft-transmissions.co.uk/index.php?act=viewCat&catId=10 Oh my gawd!!! Quote Link to comment Share on other sites More sharing options...
jericho Posted May 31, 2010 Share Posted May 31, 2010 however, I do wonder if there are any specialist companies that make a set of lowered ratio T gears. Yes,there is a chap in Australia who took over from Maxidrive the production of lower ratio gears. Can't remember his name,but have a look on pirate4x4.com,in the landrover section - they had a group purchase thread running some time ago. Quote Link to comment Share on other sites More sharing options...
v8bobber Posted May 31, 2010 Author Share Posted May 31, 2010 This'll be what i need instead then is it? http://www.ashcroft-transmissions.co.uk/index.php?act=viewProd&productId=201 Quote Link to comment Share on other sites More sharing options...
jericho Posted May 31, 2010 Share Posted May 31, 2010 Not on Pirate,but Outerlimits.com The company is M.R.Automotive. Quote Link to comment Share on other sites More sharing options...
simonr Posted May 31, 2010 Share Posted May 31, 2010 Any idea by how much you want to reduce the ratio? Si Quote Link to comment Share on other sites More sharing options...
RedLineMike Posted June 1, 2010 Share Posted June 1, 2010 v8bobber, what size tyres do you run? i trial with midwales & PMS & have used a 80" 4.2v8 on 35's & a 100" 200tdi on 750s & i would say that both of them have the gearing about right for the tyre size, if anything sometimes i find the tdi on 750's too low geared & have to go a gear higher than normal, saying that it may be because im sued to running a 90 on 35's, are you finding it too high geared on climbs or decents? Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted June 1, 2010 Share Posted June 1, 2010 http://forums.lr4x4.com/index.php?showtopic=49833&pid=451269&st=0entry451269 Quote Link to comment Share on other sites More sharing options...
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