[Damo]

Hi Guys,

Las night driving at 50km/h using cruise control, I noticed my revs increase to about 3000rpm. I tapped the brake to get out of Cruise Control and they didn't drop so I slid the lever over and tried to manually select a gear and every time I chose something other than 2nd, it went straight back into second. I had to pick a friend up from the beach and was almost there so I quietly carried on. I used low range on the beach with all gears working normally. Then when we left a few hours later, I had all the high range gears working again. Halfway home though it happened again.

Anyone heard of this?

Not sure whether this is relevant but before it happened (the drive before), my cruise control wouldn't stay on. Every time I pushed the button the light on the dash would glow for a second and then go off.

Any help would be great guys!

Cheers,
Damo.

 

[RRPhil]

No sign of a 'TRANSMISS’N OVERHEAT' warning on the main message centre?

Phil

 

[Damo]

I did have that warning a week ago on the beach. It was particularly soft sand and the warning came up. We were just about at our destination though so I stopped about a minute after and it was all fine going back.

So, yes, I have had this message but a week before his trouble.

Cheers,
Damo.

 

[Dan_UK_1984]

More than likely is trans overheat, soft sand is hard work for the trans. Don't always trust it to give you a warning. I had very similar symptoms whilst driving through the welsh hills "enthusiastically" after about 20 minutes of sticking in low gears it corrected itself.

You should definitely get the trans fluid and filter changed, when the oil overheats it looses its lubrication properties.

 

[RRPhil]

If the problem persists you may need to get your radiator and/or oil cooler replaced.

viewtopic.php?f=2&t=36021

Phil

 

[ZambeziHSE03]

I agree, the same thing was happening to me up until I changed my radiator and trans oil cooler this past weekend. All is fine now (knock on wood) but im getting a transmission flush done tomorrow with new filter and gasket etc so hopefully i'll be all set.

 

[Damo]

Thanks for your thoughts. I am due for a service soon so I'll get the Transmission oil and filter done then and see what happens.

Cheers,
Damo.

 

[Malafax_dand]

Defenitely get the transmission fluid changed if it has not been performed since 2002.
http://rangerovers.net/forum/viewtopic.php?f=2&t=36627&p=284724#p284724
Fluid and filter numbers.

 

[heppsen]

What type of gearbox do you have? GM or ZF?
The GM is used with TD6 engines, the ZF in V8 petrols.

Both have special design faults which can cause trouble.
The gM losses all gears by eating the transmission lock clutch and the ZF usually looses the reverse gear first, then some others as a part of the hydraulic steering system can break under load.
Here are some pics. I had my ZF gearbox serviced at a ZF shop and they showed me the typical faults on the 5HP.
(mine was fine before and is even better afterwards, as those guys not only change oil and filter, bt remove the complete hydraulic block and change all gaskets, seals, balls, springs, valves, magnets, etc.

regards
heppsen