 | Home > Td5 > Stock TD5 and a 1.2 Transfer Box |
 
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| Procta Member Since: 03 Dec 2016 Location: Sunderland Posts: 5244  
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I have one in my TD5 too, But its been tuned a little, maybe to help it out when he used it for towing. I find it much more nicer to drive and if not more eco than the 300 I had. I am not planning on towing anything at the moment, my dad has joked about taking mine away, but all I will get is the clutch is on its way
 Defender TD5 90 ---/--- Peugeot 306 HDI hatch back
Success is 90% Inspiration and 4 minutes Preparation # you can make it! |
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29th Feb 2020 12:08am |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039  
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Do you have cruise control? I believe that doesn't work if you change to 1.2. Roel
1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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29th Feb 2020 6:14pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6146 
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^^^ you can fit a speedo-healer to sort that problem.
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29th Feb 2020 6:34pm |
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| Tompoole Member Since: 05 Jun 2011 Location: Bucks Posts: 828  
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I had 1.2 but swapped back to 1.4 1.2 just killed the performance especially when towing. Have fun be happy
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1st Mar 2020 9:05am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6146
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A remap is definately needed. My 110 (1.2:1, 235/85's) is like pulling away 1 gear up all the time, but the ECU tune helps a lot.
When I had 255's on it, it was horrible at hill starts, used to just pull away in low 2nd then range change to high. If I ever go back to 255's then I'll swap the box back to a 1.4 |
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1st Mar 2020 11:14am |
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| shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 834 
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As above my 110 300tdi had its fuel pump optimised by Gwen Lewis before I had the 1.2 xfer box fitted - it went like the proverbial off a shovel
After fitting the 1.2 gears + Alisport intercooler and straight through exhaust, it went well, towed with ease and returned better MPG. 
Logical really, to pull higher gears you need more power and torque. Just because you're offended doesn't mean you're right. |
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1st Mar 2020 1:26pm |
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| achuakh Member Since: 12 Apr 2012 Location: Singapore Posts: 161  
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It really depends on what you use the car for.
I've had the 1.2 and it works great for me. I don't tow a horse box around although i did tow a series 3 for over 100km and it was good. Yes, remapping will help your pull away on steep inclines but if you are running around in town then i guess you don't need it. Cruise control will work, if you change a few numbers while remapping, basically copy the valid gear ratios from a disco into it and it's done or install a speedo healer, depending on your area of expertise. I've tried both ways. I would say adjusting the valid gear ratio is better and the ECU will get your "correct" road speed. Fuel economy is better and you cruise better on the highway with lower revs. Some will say fit the global roamer (roamer drive) overdrive unit, but that $$$ a little much to stomach unless you have a mint transfer box and don't want to mess with it. advantages, you have split gears (more gears to play with) and a way better cruising vs the 1.222 box. Nothing changes with the low range ratio. It's all up to you and everyone will have their own experiences. If you have a broken t-box, then no harm trying the 1.222 disco box while you can rebuild your 1.410 box if you really don't like it and then sell the 1.222 The defender has migrated, leaving the owner behind. |
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2nd Mar 2020 8:26am |
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| miker Member Since: 13 Sep 2015 Location: Surrey Posts: 1772 
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I think overall the 1.4 is probably the way to go, I've mostly given up driving it at 70+ because of the wind noise as much as anything! If I'm ever really in a hurry I put headphones in or take the skoda...
I really can't be bothered with having to pull away in low box when I've got a heavy trailer on! |
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5th Mar 2020 11:36pm |
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| Hufflepuff Member Since: 25 Oct 2014 Location: Hampshire Posts: 727 
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I fitted a 1.2 to my Td5, with 33" tyres and it was fine. Yes first gear is a bit tall, not ideal for pulling away with a trailer but then if you are really in a bind on a hill you can always drop to low ratio.
Made it much more comfortable on the motorway. My understanding is that the Discovery 2 was fitted with this ratio from factory, so they didn't consider it too tall either. However with that said - its much better with a remap, which I subsequently got  2005 Td5 90 XS
1989 V8 110 CSW |
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6th Mar 2020 1:45pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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Both Discovery 1 and 2 had the 1.2 box but they both ran on smaller tyres than Defenders - the nominal equivalent of 6.50's. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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6th Mar 2020 2:06pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5900 
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Hence why its ok in a Disco? 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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6th Mar 2020 2:20pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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Yes, the smaller tyres offset the effects of the taller transfer box gearing. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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6th Mar 2020 2:33pm |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039
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I ran my CT Discovery on 235 85 16 bfg's and changed to a defender transfer box 1.4. as I found the 5th too big. I was changing between 4th and 5th on every small incline. The 300 tdi was taken care off by twisted animations and later I adjusted the turbo pressure and the HP diesel pump a little more.
 Click image to enlarge Roel 1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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6th Mar 2020 6:25pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2980
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I’ve got a 110 TD5 SW and have always been fine with the standard 1.4 transfer box. The vehicle seems well balanced and will sit happily at 65mph which seems a natural cruising speed for a Defender.
The best thing l did was fit cruise control, on the later TD5 it’s basically just two buttons and a wiring harness, as all the electronics are already present. The vehicle has a mild remap (around 25bhp) so it will sit at 65mph with the cruise control engaged even on the steepest motorway hills. |
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6th Mar 2020 11:17pm |
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