Landrover Discovery 2 TD5 automatic

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PopPops said:
Sorry, no, not the first part, but maybe the second part, do you get clutch slip in lockup (lockup is generally over 50mph)?

Cheers.
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I am not too sure, I will be able to tell you this tomorrow morning I haven’t really noticed. What would this indicate if I didn’t get slip?
 
LewMac13 said:
I am not too sure, I will be able to tell you this tomorrow morning I haven’t really noticed. What would this indicate if I didn’t get slip?
Click to expand...
That's why I was asking the more knowledgeable whether lockup locks up the whole box, or just the TC. If just the TC it could be another way of confirming you have clutch slip. If it still slips in lockup, you definitely have clutch slip, if you see what I mean. But if lockup locks the whole box, it doesn't tell you much.

Sorry, I seem to have muddied the waters here... Must be tired. Anyway, it might be worth a try.

Cheers.
 
PopPops said:
That's why I was asking the more knowledgeable whether lockup locks up the whole box, or just the TC. If just the TC it could be another way of confirming you have clutch slip. If it still slips in lockup, you definitely have clutch slip, if you see what I mean. But if lockup locks the whole box, it doesn't tell you much.

Sorry, I seem to have muddied the waters here... Must be tired. Anyway, it might be worth a try.

Cheers.
Click to expand...
PopPops said:
Sorry, no, not the first part, but maybe the second part, do you get clutch slip in lockup (lockup is generally over 50mph)?

Cheers.
Click to expand...

I am still getting slip at 50/60 mph

Thsnks
 
PopPops said:
Just a general auto box question. Would you also get clutch slip in "4th lockup", i.e. is the lockup only for the torque converter and the clutch pack would still slip, or does it lock "everything"?

If it is only the TC, do you still get clutch slip during lockup?

Cheers.
Click to expand...
Once you go over 56 mph, the "lock up" occurs in the TC and the TC therefore acts as if you are in a manual car with the clutch fully engaged, so it doesn't slip, providing direct driving power to the gearbox and wheels, eventually. BUT if you want to accelerate, it drops out of lock up and therefore the TC starts to do its job, so it feels like a slipping clutch on a manual but it is in fact "converting torque" i.e. giving the gearbox more of what it needs to get the vehicle accelerating.
If, when this happens, you are not getting any acceleration, then it does tend to indicate that the box has a problem.
Have you actually changed the ATF, and the filter in the box? If not, then the ATF may not be passing through the filter easily and therefore not getting to where it needs to be quickly enough to do its job. Also, you say you have checked the level, you did do this with engine running, after moving the gear change lever into all positions and holding it for a bit in each one then going back to neutral, THEN checking the level? If not then you probably don't have enough ATF in the box, which could provide the same symptoms.
 
Stanleysteamer said:
Once you go over 56 mph, the "lock up" occurs in the TC and the TC therefore acts as if you are in a manual car with the clutch fully engaged, so it doesn't slip, providing direct driving power to the gearbox and wheels, eventually. BUT if you want to accelerate, it drops out of lock up and therefore the TC starts to do its job, so it feels like a slipping clutch on a manual but it is in fact "converting torque" i.e. giving the gearbox more of what it needs to get the vehicle accelerating.
If, when this happens, you are not getting any acceleration, then it does tend to indicate that the box has a problem.
Have you actually changed the ATF, and the filter in the box? If not, then the ATF may not be passing through the filter easily and therefore not getting to where it needs to be quickly enough to do its job. Also, you say you have checked the level, you did do this with engine running, after moving the gear change lever into all positions and holding it for a bit in each one then going back to neutral, THEN checking the level? If not then you probably don't have enough ATF in the box, which could provide the same symptoms.
Click to expand...

Yeah I checked the level with the vehicle running and I haven’t done a service on the box yet I’m waiting for the filter to come, could that be a possibility that ATF fluid isn’t getting round the gearbox quick enough

Thank
 
First thing you need to do is a few repeated oil changes to flush out any shi-te

Auto boxes respond quite well to oil changes.

We had a slipping auto box in a d2 td5 with the same symptoms as you and after 2 changes (with a couple hundred miles between) it stopped doing it and now works as it should.

Start with the cheap/easy things first and go from there. Auto boxes (contrary to popular belief) benefit well from routine oil changes to keep them perfect :)

Drop the oil, see how it goes, it’s unlikely it’s totally fubar.
 
Stanleysteamer said:
Once you go over 56 mph, the "lock up" occurs in the TC and the TC therefore acts as if you are in a manual car with the clutch fully engaged, so it doesn't slip, providing direct driving power to the gearbox and wheels, eventually. BUT if you want to accelerate, it drops out of lock up and therefore the TC starts to do its job, so it feels like a slipping clutch on a manual but it is in fact "converting torque" i.e. giving the gearbox more of what it needs to get the vehicle accelerating.
If, when this happens, you are not getting any acceleration, then it does tend to indicate that the box has a problem.
Click to expand...
Thanks Stanley, I did think it was only the TC that locked.. I think my post just added confusion, so I'll keep quiet until I have something useful to add!!!
 
For sure do 2 oil and a filter change before condemning it. ATF is not expensive.
If it is knackered, Ashcrofts are the people to go to for a new one or get one off everyone’s favourite auction website. Find one being broken so you can check it works.
 
Agree totally about the changes, and I do note you have a filter on order so look forward to changing it, (you'll take a mini ATF shower in the process!) Be careful with the six mounting lugs, I discovered one of mine was bust, once I took it off, although I was able to mend it and reuse it with liquid metal type glue.
@jamesmartin, a very knowlegeable and helpful guy on here, recommends changing the ATF once a year and, iirc, the filter once every two years. Bear in mind that doing one complete drain and refill will only take out about half the old ATF, so two gets a lot more of the old stuff out.
Best of luck!
 
PopPops said:
Thanks Stanley, I did think it was only the TC that locked.. I think my post just added confusion, so I'll keep quiet until I have something useful to add!!!
Click to expand...
Yeah, TCs and autoboxes, especially when electrick, are a voyage of discovery (oops look what I just did!). I researched a heck of a lot ont'internet to really get to grips with how lock up works, cos I'd like some manual control over mine. I did find as rather bad diagram of how to wire a switch in to do just that, but have yet to do it. But this is off topic and mine is now working better since I changed the MAF and got the engine running better. :confused:.
 
Just an update to everyone, I have now done an engine service on my disco.
I haven’t serviced the automatic transmission yet due to waiting for sump plugs to come.
I found the air filter was blocking the MAF sensor due to not been serviced for so long and not letting air through, I changed the air filter and cleaned the MAD sensor and the disco is running fine now loads of pull and no slipping, I am still going to service my auto box due to not knowing when it was last serviced, thank you for everyone who helped me with my problem
 
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