Ex-fronteraman Posted February 25, 2009 Share Posted February 25, 2009 The engine in my 1974 series 3 is a perkins 4.203 it's a restoration project at the moment and i've got until june to finish it. To get up to any decent speed will i need to swap some axles/diffs and install an overdrive? Ive read on some forums about salisbury axles from 109's and rr diffs etc but the posts were confusing and contardicting! I dont know what is on the landy at the moment, where on the boxes would i find gearbox/transfer box/axle/diff codes? Also where on the engine will i find the engine code that will confirm it's a 4.203?? Cheers guys Quote Link to comment Share on other sites More sharing options...
Phil Hancock Posted February 26, 2009 Share Posted February 26, 2009 7.50 x 16 tyres, RR diffs(RRC,disco 1 pre 300tdi) and an overdrive will give a reasonable top speed. Another option to an overdrive is to fit a high speed transfer box(ashcrofts etc) but you will be in hi all the time but lo is unmolested. Quote Link to comment Share on other sites More sharing options...
Ex-fronteraman Posted February 26, 2009 Author Share Posted February 26, 2009 I assume I will need the same ratio diffs on the front and rear axle? Is it easier or cheaper to change just the diffs or the whole axle? Im quite ignorant about drivetrain/transmission stuff! Cheers Quote Link to comment Share on other sites More sharing options...
David Sparkes Posted February 27, 2009 Share Posted February 27, 2009 It's a 'big penny' solution, but as it's a 'restoration' you are doing you get the benefit of a lot of new parts. Go to LRSeries and ask them for a pair of their NOS (ex-MOD) axles, re-configured by LR Series to have Range Rover differentials and whatever brakes you want on them. As I say, the cost seems expensive when seen as one lump, but you get all new brakes with no faffing about. Some of your existing stuff may be saleable, but I have no idea how much you get for it. You say "I'm quite ignorant about drivetrain/transmission stuff!". Are you certain you know what you are getting with the Perkins 4.203 in a Series 3? I'm not voting for or against you going this route, it's your choice; I'm just querying a possible conflict in your statements. A friend is going the same Perkins / RR diff route in his Series 2, but he's run the Perkins before so at least the engine characteristics are a known quantity. He is doing the LRSeries bit, which is how I know of the option, which I HOPE is transferable to a Series 3 configuration. Good Luck Quote Link to comment Share on other sites More sharing options...
Ex-fronteraman Posted February 28, 2009 Author Share Posted February 28, 2009 Ok thanks will chech that out! I bought this series 3 under the assumption it had the original 2 1/4 diesel as it was a non runner and the previous owners didnt specify, it came with the perkins and will probably stay with it! If things do go wrong though i will put a 200di lump in it. Cheers, Tom Quote Link to comment Share on other sites More sharing options...
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