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barraza · 06-11-2022, 08:52 AM

Little update:
With my current setup, i found i had a battery drain. Took a while to find, but the radiator fans draw power even with everything turned off. Not sure why, maybe it has something to do with the speed sensing they feed back to the ECM. Anyway, instead of powering them with direct battery power, they must be run by a relay switched by the key.

They were using about 40milliamps of power each. Enough to drain the battery in a few weeks.

Another thing to consider when using the 8l90e trans. It has a VERY low first gear, 4.56, and with overdrives, you end up with a wide gear range. There is no reason to use low axle gears.

I love this engine and trans. Best modification i have ever made.

06-11-2022, 08:52 AM	#20
barraza Registered User Join Date: Jul 2003 Location: N. Alabama Posts: 131	Re: Swapping L86 6.2 8l90e into 72 k10 Little update: With my current setup, i found i had a battery drain. Took a while to find, but the radiator fans draw power even with everything turned off. Not sure why, maybe it has something to do with the speed sensing they feed back to the ECM. Anyway, instead of powering them with direct battery power, they must be run by a relay switched by the key. They were using about 40milliamps of power each. Enough to drain the battery in a few weeks. Another thing to consider when using the 8l90e trans. It has a VERY low first gear, 4.56, and with overdrives, you end up with a wide gear range. There is no reason to use low axle gears. I love this engine and trans. Best modification i have ever made.