xanado Posted June 17, 2009 Share Posted June 17, 2009 Does anyone have experience of the pros and cons of fitting 1.222 ratio disco transfer gears in place of the 1.410 ratio gears into a defender TD5 (2004) transfer box. The vehicle has already had a stage 1 retune to lift the power to 170bhp. Specifically I'm interested in acceleration from start when pulling loads up to 2 tons and overall crusing power when both towing and not towing. Chris Quote Link to comment Share on other sites More sharing options...
Lara Posted June 17, 2009 Share Posted June 17, 2009 Hi Chris, Simply put, changing from a 1.4 to a 1.2:1 transfer box will adversely affect your acceleration from standstill, it is only a real benefit for motorway cruising etc without a trailer. Lara Quote Link to comment Share on other sites More sharing options...
smo Posted June 17, 2009 Share Posted June 17, 2009 If you need more pull off the line then either fit smaller diameter tyres or fit a 1.6 T-box, a 1.222 is great when upto speed but makes it (13%??) more tricky than a 1.4 to pull away. Quote Link to comment Share on other sites More sharing options...
Andrew Chua Posted June 18, 2009 Share Posted June 18, 2009 if you don't do towing, sure, you are better off with a 1.222. i've done this conversion on mine. more relax crusing on the highway. 2 tonne trailer?! not going to work well. Quote Link to comment Share on other sites More sharing options...
NicTheOrange90 Posted June 19, 2009 Share Posted June 19, 2009 if you don't do towing, sure, you are better off with a 1.222. i've done this conversion on mine. more relax crusing on the highway.2 tonne trailer?! not going to work well. Ditto above, when I had my TD5 from standard gearing I brought another 110 on a trailer back from Spain, pulling off from standstill was never a problem. Had the Disco transfer box gearing and without a trailer results were fantastic. I have Td5 Alive stage one (tune) and this helped, but have now fitted their intercooler and turbo boost (not tried it yet as rebuilding front axle so its not drivable, but a 3.5 tonne trailer needed much more revs and gentle clutch. I know you can start off ini low, but my transfer selector gearchange is a little rusty and Id probably end up at a standstill again while going from low to high... As I only tow less than ten percent of the time its worth it. Quote Link to comment Share on other sites More sharing options...
fender1234 Posted June 19, 2009 Share Posted June 19, 2009 if you need acceleration but then want it to cruise nicely maybe an overdrive would be a good idea. Quote Link to comment Share on other sites More sharing options...
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