Originally Posted by Simon B
So should I be planning a disco ratio change and fit some s.winch freewheelers?
You need to modify the transfer case to be part time 4x4 too, Bearmach did do a kit which was sold as "defender 110/90 free wheel hub kit" which included a splined spider to replace the guts of the centre diff.
With a standard 2.8 i would run a 1.410 transfer case until i had upgraded the engine, its plenty long legged enough if you run 235/85/16 or larger tyres, unless you spend hours every day at 70+ on the Mway as i do.
the 1.410 is best all round, which is why its the std ratio for 110, there is a lower 1.666 which is hideously low.
the free wheel hubs and part time 4x4 do make a small difference to economy and performance, but i wouldnt bother, the only reason i did it is because the series 2 front axle has no CV joints and isnt suited to constant 4X4, i drove a 110 with selectable 4X4 and the handling in the bends wasnt good, loads of undeersteer, quite unstable really, especially once youre used to keeping it planted in the carpet around bends and letting the front axle pull you round.
you should get low 30s MPG driven sensibly, maybe even 35 with an intercooler.