Petergg Posted February 7, 2008 Share Posted February 7, 2008 Has any one got contacts with a company that could build a torque converter for my TD5 Defender Auto, I need one that will not sit spinning and heating the oil, but allow the Defender to move Quote Link to comment Share on other sites More sharing options...
D9OSV Posted February 7, 2008 Share Posted February 7, 2008 Hi Peter, I know Lara had a similair problem, might be worth asking him. Are you using a TDI torque convertor or the larger v8 one? Jim Quote Link to comment Share on other sites More sharing options...
BogMonster Posted February 7, 2008 Share Posted February 7, 2008 I don't know if Ashcrofts do this but if they don't I should think they could point you towards somebody that did? May also be worth asking the tuning companies like Fearn etc as they must have the problem with twiddled Td5s I would think. Quote Link to comment Share on other sites More sharing options...
tiddler Posted February 7, 2008 Share Posted February 7, 2008 I don't know if Ashcrofts do this but if they don't I should think they could point you towards somebody that did? May also be worth asking the tuning companies like Fearn etc as they must have the problem with twiddled Td5s I would think. Ashcrofts did one for me. Actually, they farmed it out to someone they use, but my dealings were with Ashcrofts. I asked them to lower the stall speed and that is what they did. Now when you press the pedal it goes and doesn't just sit there revving! Can't remember the cost, but it was less than 200 quid. Tid Quote Link to comment Share on other sites More sharing options...
Petergg Posted February 7, 2008 Author Share Posted February 7, 2008 Thanks. I had a word with Dave (Ashcroft) and he is going to sort one for me, the one I have at the moment is a std TD5 one from a Disco but I am taking my box out soon for a overhaul as the oil got a tad hot in France last week so might as well do that all at the same time. They have the upgrade on Ashcrofts website , they did the box for me a couple of years ago with larger clutch packs and oil pump etc and it has been very good, but like every thing in this trade things move on. Peter Quote Link to comment Share on other sites More sharing options...
malpasman Posted February 7, 2008 Share Posted February 7, 2008 Try JP (Automatic Transmissions) Ltd http://www.jpat.co.uk/ I have not used then myself but others rate them. Alan Quote Link to comment Share on other sites More sharing options...
TomG Posted February 7, 2008 Share Posted February 7, 2008 JPat re-manufacture torque converters: http://www.jpat.co.uk/productsandservicestorque.htm Anyone know the standard stall speeds for the different ZF TCs? I guess a lower revving engine with lower torque band would want a slower stall speed, any downsides of lowering from standard? I guess more torque going through the box at a lower line pressure? There seems to be lots of choice of stall speed for the yank auto boxes but little info for the ZFs? What's the best stall speed for different engines / applications? Quote Link to comment Share on other sites More sharing options...
BogMonster Posted February 7, 2008 Share Posted February 7, 2008 According to RAVE the V8 stall is 2200-2400rpm and the Td5 is 2600-2800rpm. I think the Td5 stall speed is bonkers, logic suggests it should be somewhere around the peak torque figure surely! Quote Link to comment Share on other sites More sharing options...
BogMonster Posted February 7, 2008 Share Posted February 7, 2008 A bit off topic but http://www.ashcroft-transmissions.co.uk/part_80.html that looks nice Quote Link to comment Share on other sites More sharing options...
ashtrans Posted February 7, 2008 Share Posted February 7, 2008 Hi, TomG, yes the lower the torque the lower the stall speed, if you go too low you get too much 'creep' and it gets harder to hold on the brakes but you also get more vibration in drive at standstill as the engine/converter is trying to drive but you are holding it on the brakes, also as you mention the clutch packs have increased load at lower RPM but this brings me onto the Compushift, you can just raise the pressures at the press of a button, Bogmonster, (addmittidly I am a little biased ! ) the 'compushift' is brilliant, allows you to totally 'tune' the transmissions, when it shifts, at what pressures, when it locks up, tiptronic control Etc. This is a massive step forward for us autobox boffins ! Quote Link to comment Share on other sites More sharing options...
bishbosh Posted February 7, 2008 Share Posted February 7, 2008 Dave, So can the compushift lock up the TC in low range 1st to get some darned engine braking to stop hill descents being quite so "entertaining"? Now that would be a cool thing to have - could almost end the manual vs auto debate!! Quote Link to comment Share on other sites More sharing options...
smo Posted February 7, 2008 Share Posted February 7, 2008 Compushift looks great im even considering an auto in the D-Lander, however no one is publishing prices which is a little worrying. Quote Link to comment Share on other sites More sharing options...
ashtrans Posted February 7, 2008 Share Posted February 7, 2008 Hi Bish, you can choose to have it lock up in 3rd and 4th, just 4th or never, not in 1st or 2nd Smo, the cost is £ 775 + VAT, Quote Link to comment Share on other sites More sharing options...
smo Posted February 7, 2008 Share Posted February 7, 2008 Thanks Dave, seems pretty good considering what it allows and how easily....now if i can find a disco II auto box... Quote Link to comment Share on other sites More sharing options...
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