TD5 auto gearbox fault?????

hi all my dad has a 53 plate disco td5 auto. it has a gear change fault. when u put accelerator pedal to floor it gets to bout 3000 rpm is an starts jerkin. best way of explainv it is it feels like it hits a rev litmiter in a petrol car. if u let of accelerator bout 1/4 it will carry on the. an change gear normaly.

Sounds like the box is low on oil, it holds around 9 litres, may need a top up.

if you compare that with a stall test result it leads to clutch slip

sierrafery said:

if you compare that with a stall test result it leads to clutch slip

Click to expand...

clutch silp??? its auto:S

auto has 6 multi clutch packs in it ,to see if a clutch is an issue drain some oil out if its blackish and smells burnt you have 1 or more burnt clutch packs

tommxtom said:

clutch silp??? its auto:S

Click to expand...

did you think i was talking about stall test on a manual?

check out the attachments(from the workshop manual).... concentrate on nr 11 in the section view and point 7 of the stall test

You learn something every day

Sounds like overboost symptoms.

eddmco said:

Sounds like the box is low on oil, it holds around 9 litres, may need a top up.

Click to expand...

+1 on the oil being low. I had the same problem before I sorted all my leaks. Now the leaks are fixed and the oil is at the correct level the problem has gone away.

Fingers crossed this is my experience too. I got the same when I put my foot down, a jigging and losing revs. Having it diagnosed on Wendesday morning, fingers crossed :S

Check the Turbo Modulator first.... +1 [emoji651] on over boost symptoms....
Its the small square unit hidden behind the MAF.
Check all the small pipes **carefully** for splits etc.
Check the turbo mod actuator rod is free to move ( they are stiff by nature, and require some force) lightly oil and work back and forth.
This is a great source and reference for all... (Haynes could learn a thing or two..)
http://www.discovery2.co.uk/wastegate.html

Could be alot cheaper than leaping in with the gearbox.

Yeah I've been chatting to the guy who did that site I'll give that a go cheers

Turns out the injector has gone , still better than a new gearbox!