I recently put my 98 Disco FXI XS into a local garage here in Dubai for service and for good order I asked them to change all the oils, including the transmission, automatic gearbox, differential etc etc, since I did not know how long they had been in there.
As an engineer I thought this was a good practice, but now I'm not so sure. The automatic gearbox worked fine before it went in but now when it has come back, there are some really weird problems which weren't there before.
1. When driving and changing down manually, either it doesn't down shift at
all, or when it does it does so very late and quite violently.
2. When selecting reverse, you get the familiar "clunk" but it is not so strong
as before and the vehicle does not move. I now have to rev the engine
quite hard to get it to pick up the drive and when it does it jerks back
violently - and usually stalls. After that I can select reverse and drive
away but the same thing happens the next time I want to select it.
As an engineer, common sense tells me that simply changing the oil should not cause this, but there is also a note in the Haynes Manual which says this is a "specialised" job and should only be entrusted to a Land Rover dealer.
I have checked the obvious, which is the fluid level and it is fine. I would suspect some kind of "Air lock" but I don't know if it is possible or how to resolve it. Any ideas????
Archy
As an engineer I thought this was a good practice, but now I'm not so sure. The automatic gearbox worked fine before it went in but now when it has come back, there are some really weird problems which weren't there before.
1. When driving and changing down manually, either it doesn't down shift at
all, or when it does it does so very late and quite violently.
2. When selecting reverse, you get the familiar "clunk" but it is not so strong
as before and the vehicle does not move. I now have to rev the engine
quite hard to get it to pick up the drive and when it does it jerks back
violently - and usually stalls. After that I can select reverse and drive
away but the same thing happens the next time I want to select it.
As an engineer, common sense tells me that simply changing the oil should not cause this, but there is also a note in the Haynes Manual which says this is a "specialised" job and should only be entrusted to a Land Rover dealer.
I have checked the obvious, which is the fluid level and it is fine. I would suspect some kind of "Air lock" but I don't know if it is possible or how to resolve it. Any ideas????
Archy