LT230 transfer box

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cortina1498
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LT230 transfer box

Postby cortina1498 » Thu Sep 27, 2012 7:09 pm

Hi, I'm seeking advice, will the transfer box from a defender, LT230 suffix 20D with the 1.6:1 ratio be a straight swop for my existing 1.2:1 transfer box on my 1995 discovery 300tdi auto.
thanks in advance
Linda

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davew
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Postby davew » Thu Sep 27, 2012 7:27 pm

Yes, it should be a straight swap.

Your 1.2 box might be a "Q" suffix in which case you might find the 1.6 a bit noisier. You might find 1.6 a bit low geared unless you're going to put 35 inch tyres on it too.

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Matthews
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Postby Matthews » Thu Sep 27, 2012 7:58 pm

Yes but the ratio's won't work , if you're running 235/85/16's you can use a 1.4 but if 205 16 or 235/76 16 you need to stick with the 1.2 (which are the most common and cheapest so if you've go a 1.6 some of the big tyre brigade will snap your hand off as they're difficult to find)
Matthew

cortina1498
Posts: 22
Joined: Sun Sep 05, 2010 8:16 pm
Location: york
Full Name: barry tordoff

Postby cortina1498 » Thu Sep 27, 2012 8:20 pm

Hi, many thanks for the info, using 31" tyres according to 'Ashcroft calculator' the 1.6:1 transfer box would give me 21.5mph per 1000 revs
Seeing as I very rarely go over 60mph (2750 revs) I can live with that.
It will certainly stop my gearbox shifting from fourth to third and back every few yards on a hill when I am towing my caravan.
Once again thanks
Linda

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Matthews
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Postby Matthews » Sun Sep 30, 2012 5:22 pm

I've tried it and settled on a 1.4, the 1.6 is fine with the 35" Simex's on but too low geared with the 32" normal mud tyres (285/75/16) torque converter was going into full lock up at about 40mph with the 1.6 xfer box.
Matthew


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