trickydicky Posted April 18, 2010 Share Posted April 18, 2010 hi can anybody tell me the transfer box ratio on an early defender (1990) Quote Link to comment Share on other sites More sharing options...
western Posted April 18, 2010 Share Posted April 18, 2010 Standard should be 1.410:1 some military vehicles with the 2.5n/a diesel had 1.667:1. Quote Link to comment Share on other sites More sharing options...
jbs Posted April 18, 2010 Share Posted April 18, 2010 Depending on who bought it when new-what I mean by this is if it was bought by the MOD then it'll have a 1:666 ratio transfer box and if it was a civilian vehicle then it would have a transfer box ratio of 1:410, However if someone's mucked about with it and swapped the original transfer box over for a discovery one then it will have a ratio of 1:222 HTH John Quote Link to comment Share on other sites More sharing options...
jbs Posted April 18, 2010 Share Posted April 18, 2010 western beat me to it bugger Quote Link to comment Share on other sites More sharing options...
Prith Posted April 19, 2010 Share Posted April 19, 2010 Standard should be 1.410:1 some military vehicles with the 2.5n/a diesel had 1.667:1. Whats the advantage/disadvantage of the 1.667:1 to the 1.410:1? Quote Link to comment Share on other sites More sharing options...
jbs Posted April 19, 2010 Share Posted April 19, 2010 the lower ratio one ie: 1.667:1 has a lower speed to it-it was for military vehicles 90 and 110's that needed to pull heavy weights-thats from my own personal experience of when I was in the army many moons ago-top speed in a 2.5 NAD of about 60 mph Quote Link to comment Share on other sites More sharing options...
trickydicky Posted April 19, 2010 Author Share Posted April 19, 2010 the lower ratio one ie: 1.667:1 has a lower speed to it-it was for military vehicles 90 and 110's that needed to pull heavy weights-thats from my own personal experience of when I was in the army many moons ago-top speed in a 2.5 NAD of about 60 mph thanks guys so the higher the number the lower the speed? Quote Link to comment Share on other sites More sharing options...
rawsondsr Posted April 19, 2010 Share Posted April 19, 2010 any way of telling what you habe without crawling under looking for a serial number? I've always thought that i've got the 1.6 over the 1.4 but havent a clue??? Quote Link to comment Share on other sites More sharing options...
jbs Posted April 19, 2010 Share Posted April 19, 2010 The only way you'll be able to tell-if it's still on there is to look for a sticker on the rear of the transfer box by the handbrake drum telling you which one it is ie: 1.410, 1.222 etc etc and yes the higher the number the lower the speed Quote Link to comment Share on other sites More sharing options...
Prith Posted April 20, 2010 Share Posted April 20, 2010 Well looks like I have the 1.667 ratio on my 1990 defender 110 which had a 2.5NA and now I have replaced it with a Defender 200TDi engine plus a roverdrive DX overdrive. Yet to get the landy out from the garage, can you tell me what I can expect from this combination? Does having a 1.667 ratio mean I have better torque for hauling stuff? Quote Link to comment Share on other sites More sharing options...
JST Posted April 20, 2010 Share Posted April 20, 2010 Well if you want to change it for a 1.4 one then i would be after the 1.6 one. a 1.6 is better for lower grunt yes, hence i want it as running an auto with 35 Fedimas and it needs the lower grunt. if you do alot of heavy towing in hilly areas then a 1.6 with a tdi may suit. if you spend much time on main roads then a 1.4 would be better. a 1.4 with an o/d will give about the same as a 1.2 box. a 1.6 with o/d about the same as a 1.4 i would of thought. Quote Link to comment Share on other sites More sharing options...
Andrew Chua Posted April 20, 2010 Share Posted April 20, 2010 well, not everytime the sticker is correct. there was a time when i swapped the internals of a 1.410 to 1.222 so the sticker still said 1.410 but it's 1.222 internal. to be 101% sure, take off the round cover and count the teeth of the largest gear (not largest diameter)(3 segments of teeth). Quote Link to comment Share on other sites More sharing options...
Prith Posted April 21, 2010 Share Posted April 21, 2010 thanks for the info Quote Link to comment Share on other sites More sharing options...
Aragorn Posted April 21, 2010 Share Posted April 21, 2010 well, not everytime the sticker is correct. there was a time when i swapped the internals of a 1.410 to 1.222 so the sticker still said 1.410 but it's 1.222 internal. to be 101% sure, take off the round cover and count the teeth of the largest gear (not largest diameter)(3 segments of teeth). The "largest gear" your on about is the intermediate shaft, the actual high gear is on the diff assembly, and you cant see it from inside the round cover. Quote Link to comment Share on other sites More sharing options...
Chris Davies Posted April 21, 2010 Share Posted April 21, 2010 well, not everytime the sticker is correct. there was a time when i swapped the internals of a 1.410 to 1.222 so the sticker still said 1.410 but it's 1.222 internal. to be 101% sure, take off the round cover and count the teeth of the largest gear (not largest diameter)(3 segments of teeth). Thats interesting cos my transfer box has a serial number saying its a 1.4 but it always feels undergeared. Its an early 90 with a 200tdi fitted. Could you elaborate please? which cover and when I've counted what number means what ratio? Could I have 1.6 internals on a 1.4 box? Quote Link to comment Share on other sites More sharing options...
Simon B Posted April 22, 2010 Share Posted April 22, 2010 Well if you want to change it for a 1.4 one then i would be after the 1.6 one. a 1.6 is better for lower grunt yes, hence i want it as running an auto with 35 Fedimas and it needs the lower grunt. if you do alot of heavy towing in hilly areas then a 1.6 with a tdi may suit. if you spend much time on main roads then a 1.4 would be better. a 1.4 with an o/d will give about the same as a 1.2 box. a 1.6 with o/d about the same as a 1.4 i would of thought. I'll have a 1.667 going spare soon when I put the Isuzu into my defender. I'm in Leicester JST. Quote Link to comment Share on other sites More sharing options...
shanghai1979 Posted April 22, 2010 Share Posted April 22, 2010 1.4 is standard. If you have a 1.6 you won't be able to do more than about 60mph before the engine is really screaming. I've a 1.2 in mine now and it's comfortable to drive but wouldn't like to tow anything massive over long distances. 17Foot trailer was my limit for 30 miles with the 1.2 Quote Link to comment Share on other sites More sharing options...
JST Posted April 22, 2010 Share Posted April 22, 2010 I'll have a 1.667 going spare soon when I put the Isuzu into my defender. I'm in Leicester JST. thats sounds good. to save going OT i will PM later. Quote Link to comment Share on other sites More sharing options...
picpoki Posted April 22, 2010 Share Posted April 22, 2010 I have disco 200tdi conversion with 1.2 t-box. With 2.5 petrol and 1.6 t-box top speed was 60mph. But let me say again TOP. Now with 200tdi+ 1.2 top speed is the same. Is this normal? Altough I still have some problems with a busted pipe from turbo to bosch pump... Quote Link to comment Share on other sites More sharing options...
JST Posted April 22, 2010 Share Posted April 22, 2010 (edited) I have disco 200tdi conversion with 1.2 t-box. With 2.5 petrol and 1.6 t-box top speed was 60mph. But let me say again TOP. Now with 200tdi+ 1.2 top speed is the same. Is this normal? Altough I still have some problems with a busted pipe from turbo to bosch pump... 60mph - nope it should do 80 or more. you got the right speedo sender in it? and std sized tyres? Edited April 22, 2010 by JST Quote Link to comment Share on other sites More sharing options...
reb78 Posted April 22, 2010 Share Posted April 22, 2010 Prith, i would think that a 1.6:1 box with an overdrive will give you a final gear ratio similar to that of a disco box (1.2:1). It could work quite well really, as some say that the overdrove on 1.4:1 box leaves it a bit overgeared. So I would think you will have plenty of grunt low down and a reasonable top gear for cruising. Quote Link to comment Share on other sites More sharing options...
picpoki Posted April 23, 2010 Share Posted April 23, 2010 Well I have 235/85 16 tyres. And the speed was checked with the GPS. What can be the fault for this? It seems like the engine is quite on the end with the revs at 60mph... Quote Link to comment Share on other sites More sharing options...
Prith Posted April 23, 2010 Share Posted April 23, 2010 Prith, i would think that a 1.6:1 box with an overdrive will give you a final gear ratio similar to that of a disco box (1.2:1). It could work quite well really, as some say that the overdrove on 1.4:1 box leaves it a bit overgeared. So I would think you will have plenty of grunt low down and a reasonable top gear for cruising. Thanks Reb! Quote Link to comment Share on other sites More sharing options...
western Posted April 23, 2010 Share Posted April 23, 2010 Well I have 235/85 16 tyres. And the speed was checked with the GPS. What can be the fault for this? It seems like the engine is quite on the end with the revs at 60mph... check which speedo drive gear is fitted, for 7.50x16 or 235/85x16 or 255/85x26 tyres it needs the FRC3310 20tooth Blue gear. Quote Link to comment Share on other sites More sharing options...
picpoki Posted May 31, 2010 Share Posted May 31, 2010 check which speedo drive gear is fitted, for 7.50x16 or 235/85x16 or 255/85x26 tyres it needs the FRC3310 20tooth Blue gear. Speed was checked with GPS. I even put the boost gauge on inlet manifold to see if the turbo is not working right, but the gauge shows me 11 psi. I have disco 200tdi, LT77 and 1.22 transfer box, input gear with 26 teeth. It revs just fine, top speed is 60mph, but crusing speed is 55mph. The exhaust is from petrol engine but I`m waiting original for 200tdi. Could this be exhausts fault? Even with original petrol engine and 1.67 t-box I could reach 60mph... So it would be logical to have faster car with stronger engine and faster t-box. Please help Quote Link to comment Share on other sites More sharing options...
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