Disco auto box

Teg1 · Nov 20, 2019

I have a disco td5 auto and the gearbox is playing up. What's happening is it sticks between gears until revs are high, above 4000, then it will go up a gear but with a hell of a bang. I changed the oil and filter about 4 or 5000 miles ago. So I am asking what to look for to repair this fault. OR will it need to be a new gearbox.
Thanks.

Henry_b · Nov 20, 2019

What colour was the fluid you drained?

Quantity? should of been around 4.2 litres from the sump.

Have you tried shifting it manually?

Any EML lights?

Diagnostics?

janderson41 · Nov 20, 2019

Have to ask, did you use the proper procedure to change the oil?
Engine running, go through the gears while topping up the oil.
Better with two people, Top up the gearbox until it runs out the filler hole, with the engine running, and get the plug back in before you stop the engine.
If you did it this way, your levels will be fine. Also when you drain the autobox you only get about 75% of the oil out. After a change you should change it again after about 500 miles.
If you did all that, my apologies.

Henry_b · Nov 20, 2019

The fill procedure is..

1 Top up cold with the engine off until it flows out the filler hole.. - roughly 2.3 litres. pop plug in.
2 start the engine and run it through the gears pausing for 3 seconds in each..
3 top up again till it runs out, with the engine running..
4 run through the gears again..

And you're done..

you should get roughly 4.3 litres in

changing the fluid replaces 40-50%

Teg1 · Nov 20, 2019

Henry_b said:
What colour was the fluid you drained?

Quantity? should of been around 4.2 litres from the sump.

Have you tried shifting it manually?

Any EML lights?

Diagnostics?

Yes Henry I tried it manually with no effect. The oil I got out was dark but red sort of colour going in when I changed the filter also around 4 or 5000 miles ago.
As for eml lights it seems they have a mind only known to themselves ever since getting the car.

Feathers McGraw · Nov 21, 2019

Teg1 said:
As for eml lights it seems they have a mind only known to themselves ever since getting the car.

If that's the case you need to offer unlimited tea and cakes for someone local to plug in a Nanocom or Hawkeye diagnostic to read for fault codes.

Teg1 · Nov 22, 2019

janderson41 said:
Have to ask, did you use the proper procedure to change the oil?
Engine running, go through the gears while topping up the oil.
Better with two people, Top up the gearbox until it runs out the filler hole, with the engine running, and get the plug back in before you stop the engine.
If you did it this way, your levels will be fine. Also when you drain the autobox you only get about 75% of the oil out. After a change you should change it again after about 500 miles.
If you did all that, my apologies.

I did all that but thank you. I got told when I was talking to people about doing oil change. First time I have come across this method.

Disco auto box

Teg1

Member

Henry_b

Think outside, no box required.

janderson41

Active Member

Henry_b

Think outside, no box required.

Teg1

Member

Feathers McGraw

Well-Known Member

Teg1

Member

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