blgdave
Active Member
- Posts
- 164
- Location
- Whangarei, New Zealand
Hi Folks,
A few weeks back when towing a car trailer through a mountain range I noticed my transmission temperature light was illuminated on the dash. I let everything cool down and set off again, it came back on within 10 minutes.
I eventually made it home and just put the light down to high temps down to towing up and down hills, even though it had not happened before. Then for a few weeks it all went fine with no lamps lit.
Then last week when making a few trips up and down into town with trailers full of soil the light came on again. This time after just two days the light came on just driving through a cut field after just 30 seconds of driving.
The temperature outside was 25C and the Disco had been parked up for four hours. Yet the light still came on with no loads and just normal driving in dry grass.
I realised I must have an issue!
Doing my research I see that a common issue is the sender/sensor that sits in the bottom of the transmission cooler in the front of the radiator. But I had to do a check on fluid levels for peace of mind of course.
This was the twist that confuses me. I jacked the car up and sat it square on four stands. On removing the filler plug (not the lower drain plug) from the gearbox sump, a strong flow of ATF shot out. Once I got a bucket to catch this and removed the plug, approx 500ml in total of ATF flowed into the bucket at a fast rate.
Following several instructions and once the ATF started to flow in a steady 1.5mm flow of fluid I replaced the filler plug.
I then went up and down the gearbox with the engine running to ensure the whole box was lubed up. Then checked the fluid level again and still the same small flow of fluid came out of the filler.
So in my eyes the box has sufficient ATF in there, but why did so much come out when I first checked it? Also how would it be possible to overfill the box if indeed this is the case?
Even after all of this, the transmission temp light still came on, in fact straight away this time. Then stayed lit up!
On disconnection of the sender loom connector the dash light went straight out. Naturally proooving its not an isse with the gearbox sender.
I am fairly confident my cooler sender is goosed and will replace this. But am a little worried about the ammount of ATF that came out of the filler.
Sorry for the long story, but its as it all happened and may help others if in teh same boat.
What are peoples thoughts??
Cheers
Dave...
(2001 V8 Series 2 Disco, Auto)
A few weeks back when towing a car trailer through a mountain range I noticed my transmission temperature light was illuminated on the dash. I let everything cool down and set off again, it came back on within 10 minutes.
I eventually made it home and just put the light down to high temps down to towing up and down hills, even though it had not happened before. Then for a few weeks it all went fine with no lamps lit.
Then last week when making a few trips up and down into town with trailers full of soil the light came on again. This time after just two days the light came on just driving through a cut field after just 30 seconds of driving.
The temperature outside was 25C and the Disco had been parked up for four hours. Yet the light still came on with no loads and just normal driving in dry grass.
I realised I must have an issue!
Doing my research I see that a common issue is the sender/sensor that sits in the bottom of the transmission cooler in the front of the radiator. But I had to do a check on fluid levels for peace of mind of course.
This was the twist that confuses me. I jacked the car up and sat it square on four stands. On removing the filler plug (not the lower drain plug) from the gearbox sump, a strong flow of ATF shot out. Once I got a bucket to catch this and removed the plug, approx 500ml in total of ATF flowed into the bucket at a fast rate.
Following several instructions and once the ATF started to flow in a steady 1.5mm flow of fluid I replaced the filler plug.
I then went up and down the gearbox with the engine running to ensure the whole box was lubed up. Then checked the fluid level again and still the same small flow of fluid came out of the filler.
So in my eyes the box has sufficient ATF in there, but why did so much come out when I first checked it? Also how would it be possible to overfill the box if indeed this is the case?
Even after all of this, the transmission temp light still came on, in fact straight away this time. Then stayed lit up!
On disconnection of the sender loom connector the dash light went straight out. Naturally proooving its not an isse with the gearbox sender.
I am fairly confident my cooler sender is goosed and will replace this. But am a little worried about the ammount of ATF that came out of the filler.
Sorry for the long story, but its as it all happened and may help others if in teh same boat.
What are peoples thoughts??
Cheers
Dave...
(2001 V8 Series 2 Disco, Auto)
