deejer Posted December 16, 2010 Share Posted December 16, 2010 I have a 1989 Defender 90 which has a Disco 200tdi lump connected to the original Def gearbox and transfer box. I can only get 55/60 out of her before she is screaming and a local mechanic recommended fitting a disco gearbox and transfer box. Ive waded through the forums and there seem to be conflicting stories / advice over what needs to be done. I am no mechanic just an enthusiastic amateur wanting to learn. So in simple terms should I buy a disco gbox and tbox and if so can I assume these will fit straight onto my current engine and bellhousing ? or do I just buy the disco transfer box and will that fit straight onto my currrent def gearbox. The engine side is sorted i.e. the disco engine is already in so dont need the guidance on that part. Please someone give me simple answers or point me to where I can find them as my poor small brain is fried from wading through forums and working out the conflicting guidance! Thanks. Quote Link to comment Share on other sites More sharing options...
western Posted December 16, 2010 Share Posted December 16, 2010 what engine was in it originally ? the Discovery main gearbox will not easily fit, it'll need either metal work mods to the seatbox or gearbox will need stripping to convert to the 90's gearlever location, you can use the Disco 1.2 transferbox, fairly straight swap, your existing transferbox might have the 1.667 gearing, hence engine not working happily. Quote Link to comment Share on other sites More sharing options...
deejer Posted December 16, 2010 Author Share Posted December 16, 2010 dont know what was in it before I assume it was a standard 2.5d Defender lump though. Quote Link to comment Share on other sites More sharing options...
deejer Posted December 16, 2010 Author Share Posted December 16, 2010 is there a specific part number or model number I should be looking for in a Disco 1.2 transfer box ? Quote Link to comment Share on other sites More sharing options...
western Posted December 16, 2010 Share Posted December 16, 2010 any Discovery 200 or 300tdi transfer box will fit as will a 1.41 defender transfer box. the list here http://www.ashcroft-transmissions.co.uk/index.php?act=viewProd&productId=45 click on the techincal info red line, gives the prefix info & gear ratio. Quote Link to comment Share on other sites More sharing options...
deejer Posted December 17, 2010 Author Share Posted December 17, 2010 many thanks - really appreciate the advice. Just lost all my oil pressure so will be swapping the engine for one ive rebuilt so a great opportunity to sort the transfer box too ! Quote Link to comment Share on other sites More sharing options...
voevod Posted December 18, 2010 Share Posted December 18, 2010 many thanks - really appreciate the advice. Just lost all my oil pressure so will be swapping the engine for one ive rebuilt so a great opportunity to sort the transfer box too ! I've done a recent engine change from a disco into my 110.I also had a 1.66 t/box in,which I've now swapped over for a 1.2 disco box...you may find the water pump sits at a slightly different angle for the bottom hose,but I just butchered one to fit.I also had to use the steering pump from the defender engine,as the fittings were completely different and had to change a pulley or two.You may also have to change the temp switch,mine still shows it's running hot. Quote Link to comment Share on other sites More sharing options...
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