Discovery 3 Gear Box Fault

Discovery 3 Gear Box Fault

Author
Discussion

John D9395

Original Poster:

377 posts

208 months

Friday 17th April 2015
quotequote all
Hoping someone can help.

My mate has a Discovery 3 with an Auto gear box, and he says that periodically, but becoming more frequent, the car seems to slip out of gear whilst moving, he describes it by saying if it was a manual, he would say the clutch is slipping.

I drive an S Type Jag which has the same 2.7 V6 engine, and I know that a lot of Jag gear box problems (fitted with a so say sealed for life gear box, but most know it needs an oil change to extend the gear box life) seem to do with oil, change the oil and the problem disappears. I appreciate that although the engine block is the same in my Jag, the gear box will be very different.

Can anyone offer any suggestions to if an oil change may help, or is this problem more serious?

Any help appreciated.

tr7v8

7,192 posts

228 months

Friday 17th April 2015
quotequote all
Depends on how many miles it has done, it maybe too late.

eliot

11,423 posts

254 months

Friday 17th April 2015
quotequote all
Autos are full of clutches - and will slip just like a manual as if you were riding the clutch and with the same result - burning of the friction material.
Cause could be many things, but avoid allowing it to slip as you are burning the oil and filling the internals up with friction material.



grumpy

966 posts

241 months

Friday 17th April 2015
quotequote all
Get it into Land Rover and look at a big bill.

hidetheelephants

24,298 posts

193 months

Saturday 18th April 2015
quotequote all
grumpy said:
Get it into Land Rover and look at a big bill.
An LR independent or transmission specialist like Ashcroft would be a better bet and result in a lesser(but still significant) wallet-fondling.

anonymous-user

54 months

Saturday 18th April 2015
quotequote all
If it is jumping out of gear (ie. it goes from drive into neutral) it's probably the gear linkage as they seize up over time and need a grease. Does the selector slide back and forth easily?

If it doesn't actually slip out of gear, try a gearbox oil flush and some Dr Tranny shudder guard. Best place to ask questions is here: http://www.disco3.co.uk/forum/technical-d3-vf2.htm...

Just to add - the gearboxes are not sealed for life, the oil will be well and truly knackered by 100k miles and this will make the box misbehave.

Edited by anonymous-user on Saturday 18th April 20:07

Eversleigh

574 posts

185 months

Monday 20th April 2015
quotequote all
wormus said:
If it is jumping out of gear (ie. it goes from drive into neutral) it's probably the gear linkage as they seize up over time and need a grease. Does the selector slide back and forth easily?

If it doesn't actually slip out of gear, try a gearbox oil flush and some Dr Tranny shudder guard. Best place to ask questions is here: http://www.disco3.co.uk/forum/technical-d3-vf2.htm...

Just to add - the gearboxes are not sealed for life, the oil will be well and truly knackered by 100k miles and this will make the box misbehave.

Edited by wormus on Saturday 18th April 20:07
This exactly, several documented cases of a gearbox flush and Dr. Tranny solving problems with the gearboxes.