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Hi,
I have just obtained a scangauge 2 and now sort of wish I hadn't. The temps on the auto trans fluid seem a bit scary.
Normal driving around once all is warm seem to be about 60 to 90. It will rise and fall rapidly so I am assuming it is measuring the temp at the torque converter not the sump. There are two temp sensors on the transmission but how to measure them separately with a scangauge is a good question.
Here in Hobart there is a reasonable hill to get out of town heading south, it has a posted speed limit of 80. Driving up this hill in D it is easy to see the temps getting to 130. Going to S4 doesn't help as the torque converter often will not lock up until the crest of the hill then the temp falls fairly rapidly. Hate to think what it will be like with the camper trailer! Going into town and while coasting down the hill with no throttle will also cause the temp to rise. In fact it is somewhat disturbing to see the temp rise when you think there is little load on the engine from the throttle but of course there must be a fair load on the torque converter with engine braking! Even going down a multi storey car park will cause a temp rise!
The 95 manual I had prior to the 150 would hold 5th at 80 up this hill. The 150 auto wants to go to TC slip in 5th (D) or even TC slip in 4th if manually pulled back (S4). Seems like the mapping for the Auto may let it unlock a little too easily.
If the scangauge does measure the torque converter temp will adding a cooler downstream actually reduce the peak temps of the torque converter much as it will be picking up its fluid from the sump of the auto trans? Any cooling will help I suppose. Either way I will still be adding a cooler to the system.
Cheers
Prone
I have just obtained a scangauge 2 and now sort of wish I hadn't. The temps on the auto trans fluid seem a bit scary.
Normal driving around once all is warm seem to be about 60 to 90. It will rise and fall rapidly so I am assuming it is measuring the temp at the torque converter not the sump. There are two temp sensors on the transmission but how to measure them separately with a scangauge is a good question.
Here in Hobart there is a reasonable hill to get out of town heading south, it has a posted speed limit of 80. Driving up this hill in D it is easy to see the temps getting to 130. Going to S4 doesn't help as the torque converter often will not lock up until the crest of the hill then the temp falls fairly rapidly. Hate to think what it will be like with the camper trailer! Going into town and while coasting down the hill with no throttle will also cause the temp to rise. In fact it is somewhat disturbing to see the temp rise when you think there is little load on the engine from the throttle but of course there must be a fair load on the torque converter with engine braking! Even going down a multi storey car park will cause a temp rise!
The 95 manual I had prior to the 150 would hold 5th at 80 up this hill. The 150 auto wants to go to TC slip in 5th (D) or even TC slip in 4th if manually pulled back (S4). Seems like the mapping for the Auto may let it unlock a little too easily.
If the scangauge does measure the torque converter temp will adding a cooler downstream actually reduce the peak temps of the torque converter much as it will be picking up its fluid from the sump of the auto trans? Any cooling will help I suppose. Either way I will still be adding a cooler to the system.
Cheers
Prone
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