Td5 Owners

[Defender=1st]

Gday Everyone, Do Td5 owners find their vehicles controlable and driveable in High/Low range over rough ground ??
i find mine has a very jerky/touchy accelerator it has been the same ever since i have owned it (about 2 years) i have never driven any other Td5's so i dont know if mine is really bad or if they are all like this.
i have been told that it was a problem with some of the early models and if i replace the ECU and Throttle to 3 point later units instead of the original 2 point that will fix it.
But as each part (ECU and Throttle) is atleast $895 second-hand i was wondering if its really worth doin.
So do you find your Td5 is controlable in high range without surging and jerkyness over rough ground ?
Thanks Regards Adrian

[wmg]

i was told in a 4wd training course to always brace your accelerating foot against the side of the footwell to minimises jerkyness caused by vibrations when traversing rough ground.

[dmdigital]

Mine Td5 is an Auto (Disco), makes it sooo much easier.

[stevo]

mine is good in low range as there is a different fuel map in low range, is your switch that tells the computer you are in low range working??

[defenderbilby]

I also have this problem and have heard of a few other owners with similar issues. From what I am led to believe, it is the computer working out what the fuel requirement is at that instant and in rough ground that is very variable.
One trick to try that I have found works is in 1st and 2nd gear in rough ground is to take the foot off pedal or keep constatnt and let the computer fuel as required, it fuels up when it goes over mounds and fuels down when slight slope. I had read somewhere that in Africa they load the Landie with tourist, sit it in second and let the computer work it out and the speed is ideal for going through the park and wildlife.
Do you also stall at the traffic lights or when taking off? Again the computer and fueling and ?? the clutch switch. Do a search on clutch/td5/switch and hopefully it is still there. Another way round this is to bring the clutch up to engagment or close before fuelling with the pedal.
This computer driven LandRover is not the same, give me the precomputer gear anytime, that is why I am trying to rebuild the Landie/Isuzu.
David.

[disco2hse]

Never had that kind of problem with the Disco. In fact it is very well controlled and smooth but being an auto and having HDC, that required some getting used too :eek:

[DEFENDERZOOK]

in low range......the Td5 will de-sensitise the accelerator pedal to prevent it from causing the jerkiness you describe......

i suggest you test drive another Td5 and compare......you may have a sensor or switch not working.....as mentioned above......

[Blknight.aus]

it'll only do that if the low range switch on the tcase is working... if thats gone or the wiring to it then it wont know your in low and it will leave you on the big throttle map.

[Defender=1st]

Hey Everyone, in low range i find its still jerky but better than when i high range but over a rough ground either high or low they will both make you want to sell the vehicle. i currently use a block or foam/spounge under the throttle pedal to try to make it more driveable.
defenderbilby yeah when i first got it i had alot of trouble around town driving.
Thanks

Other Td5 owners any experiences ?

[Xavie]

Don't they have an electronic throttle which is meant to be able to regulate this much more effectively?

Xav

[Graeme]

My 99TD5 Disco had this problem and it was a pain. I noticed that my 03 TD5 Disco does not try so forcefully to maintain idle revs, whereas the 99 tried too hard.
It sounds as though your vehicle is an early one and the ECU is still standard so why not get it chipped with a better fuel map and get the advantage of a more powerful TD5 at the same time?

[Defender=1st]

My 99TD5 Disco had this problem and it was a pain. I noticed that my 03 TD5 Disco does not try so forcefully to maintain idle revs, whereas the 99 tried too hard.
It sounds as though your vehicle is an early one and the ECU is still standard so why not get it chipped with a better fuel map and get the advantage of a more powerful TD5 at the same time?

I was talking to Justin Cooper as he services my Defender and he said one of his mates chipped a Defender with this problem and it just made the jerkyness worse.

[Defender=1st]

So do other Td5 owners find their Td5's Driveable over rough ground in high range ?

[Aaron]

High range not realy that much of an issue. High range 1st going over a series of speed bumps in a car park it can be a bit jerky.

Low range I could jump up and down on the peddle and it will stay smooth. Probably not what you want to hear though :(

Good luck

[slug_burner]

Before I got my D2 I was a passenger in an early D2 with a manual box, it was very jerky in low range going over rocks in a dry river bed in SA, the driver said that she did not have her foot on the pedal and it was the car doing that.

[defenderbilby]

So do other Td5 owners find their Td5's Driveable over rough ground in high range ?

Try driving in the next gear up. I found that 1st high is OK at very low speeds, If slightly quicker would not make up its mind with the fueling/computer and was as described. Was fine in next gear up. You will learn to drive it differently and it should be OK.
Autos are great as they will change up before you get the jerkyness.

[Blknight.aus]

Big red goes great cross country regardless of range.

But I use the foot in the sidewall trick to help minimise foot jumps.

[Captain_Rightfoot]

It's not a problem on mine. I do think it's a tad more touchy after the ecu re-map though.

[Defender=1st]

Thanks Everyone. I will try to test drive a Td5 as soon as i find one in a dealer

[Blknight.aus]

just a thought..

if you hit an obstacle square on as opposed to angling the wheels up your going to get it and it doesnt really matter what you drive. Some vehicles get it worse than others (generally older vehicles with more primative management systems)

[Tusker]

Might be overcome now, but chipping used to make the low range surging worse. There were a lot of UK posts about it. I had to take mine back to Bruce Davis to sort it out - he just uploaded his mlider upgrade. Much more drivable on & off road.

Regards
Max P

[5teve]

i have discussed this with Mike (Tombraider) and he seems to think that the TD5 should have dual accelerator mapping which is sensitive in high range and not sensitive in low (to minimise the effect of bumps) (so you have to move your foot a long way to get it to accelerate) this was also a feature listed on a feature list on the td5

however, there were reports of surging with the engine so the fix was to reverse that accelerator mapping so the sensitive was on low range and the non sensitive was on the high...

mine is mapped the 'fixed way' which to me is backwards... and stupid.. and causes the of the original poster here... however it depends on which one you get... some are right... some are reversed... i do wish mine was right... i seem to recall tombraider saying he may have a look.... :cool:

Thanks

Steve

[George130]

I had this problem but It was the 3500rpm torque converter meaning I had all or nothing! Took weeks to learn how to drive it in traffic and next to impossible on sand. It still likes to power surge but with the more normal torque converter it is possible to drive smoothly.