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How much is heat affecting the transmissions?

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Old Aug 6, 2014 | 10:51 AM
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groundczero's Avatar
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Default How much is heat affecting the transmissions?

I am running a Th-400 with tranny cooler in my LS Fox. Located in Central FL, about a 3600 stall.

I went to the track for a test in tune last Friday.

After driving an hour then letting the car cool about 30 minutes I had the 1st pass of the night and pulled a 11.1 @ 119 on a 1.5 sixty foot.

This was the best pass of the night, on each subsuquent pass the car got slower and slower and did not leave as hard.

My engine was staying at a pretty constant temp of 190.
The only thing I can think off is the tranny getting hot does this make sense, what would be a good way to test/verify this?

I do know the car is feeling like the 11.1 pass driving to work the past couple days.
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Old Aug 8, 2014 | 10:08 PM
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Originally Posted by groundczero
I am running a Th-400 with tranny cooler in my LS Fox. Located in Central FL, about a 3600 stall.

I went to the track for a test in tune last Friday.

After driving an hour then letting the car cool about 30 minutes I had the 1st pass of the night and pulled a 11.1 @ 119 on a 1.5 sixty foot.

This was the best pass of the night, on each subsuquent pass the car got slower and slower and did not leave as hard.

My engine was staying at a pretty constant temp of 190.
The only thing I can think off is the tranny getting hot does this make sense, what would be a good way to test/verify this?

I do know the car is feeling like the 11.1 pass driving to work the past couple days.
Transmission don't loose to much efficiency unless you get them extremely hot. What was the highest transmission temperature? As for the Engine LS engine can loose 20 - 30 % of their power if the induction air temps get hot.
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