Gearbox overheat caption.

blackburnbertie · Jan 12, 2021

Hi folks. I’ve recently had a gearbox overheat caption coming on. Even when I’ve just started the car up. Thinking it was the sensor I got a new one. Now the one we thought was broken looked a bit sorry for itself so we replaced it. The colour of the new one was a reddy colour whereas the old one was black. The problem didn’t go away. I’m assuming the other sensor is the Ambient temp. So I’m wondering now if I changed the right one. Which is which, I’ve been all over google and can’t find sod all. Thanx in advance

Henry_b · Jan 12, 2021

The sensor can be seen down the side of the gearbox cooler. The plug for the sensor is blue and on leads

Mark Piercy · Jan 13, 2021

Be sure to check your gbox oil level. To be sure. To be sure!

tomcat59alan · Jan 13, 2021

Mark Piercy said:
Be sure to check your gbox oil level. To be sure. To be sure!

Been on the Guinness Mark?

blackburnbertie · Jan 13, 2021

Henry_b said:
The sensor can be seen down the side of the gearbox cooler. The plug for the sensor is blue and on leads

Hi mate, can you rewrite your second sentence. It seems a bit garbled. Ta

pwood999 · Jan 13, 2021

It looks like these depending on where you buy from. Mounted on NS end of transmission cooler.

or this

dubbleRR · Jan 13, 2021

blackburnbertie said:
Hi folks. I’ve recently had a gearbox overheat caption coming on. Even when I’ve just started the car up.

Is your battery in good health...low power on startup flashes up all sorts of error messages

blackburnbertie · Jan 13, 2021

dubbleRR said:
Is your battery in good health...low power on startup flashes up all sorts of error messages

New battery went in after last weeks mega freeze.

blackburnbertie · Jan 13, 2021

pwood999 said:
It looks like these depending on where you buy from. Mounted on NS end of transmission cooler.

View attachment 227869 or this

When I ordered a new sensor it was red. The one coming out was black. I believe they’re different part numbers and I’ve been told if you fit the wrong one it won’t work.

blackburnbertie · Jan 13, 2021

Mark Piercy said:
Be sure to check your gbox oil level. To be sure. To be sure!

The fault flashes up before the key is turned.

Henry_b · Jan 13, 2021

The sensor usually goes open circuit when it reaches the predefined "too hot" temp
short the plug on the vehicle side of the loom and the message will go away.

pwood999 · Jan 14, 2021

Just looked in RAVE and the 1999 onwards diesel transmission cooler seems to have two sensors. The fan sensor is normally open, and closes when the temp reaches 95deg +/-3. I'm guessing the warning sensor is similar to the V8's which is normally closed, and opens at high temp.

Hence the different colours & part numbers.

blackburnbertie · Jan 28, 2021

Thanx folks for all your replies. Strange thing is it hasn’t done it for a week now.

Gearbox overheat caption.

blackburnbertie

Member

Henry_b

Think outside, no box required.

Mark Piercy

Well fumbled member....

tomcat59alan

Well-Known Member

blackburnbertie

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pwood999

Well-Known Member

dubbleRR

Well-Known Member

blackburnbertie

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blackburnbertie

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blackburnbertie

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Henry_b

Think outside, no box required.

pwood999

Well-Known Member

blackburnbertie

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