C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

4+3 OD unit - remove water cooling????

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Old Jul 2, 2007 | 02:14 PM
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red86vet
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Default 4+3 OD unit - remove water cooling????

My '86 is only used for autocross and an infrequent track session. The OD unit is disabled via removal of the overdrive relay. Can the water cooling lines be permanently removed without causing any issues. I am installing a better oil pan and I thought about removing the overdrive water cooling lines while I was at it.
I am also posting this in the autocross and racing forum.
Thanks.
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Old Jul 2, 2007 | 05:29 PM
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The internal pump doesn't stop running if the OD unit is not engaged. Removal of the ATF fluid lines may very well cause the OD to weld itself together in a short period of time.

The lines route ATF to and from the radiator in the same fashion as a car equipped with an automatic tranny. The lines connect to a tube inside one of the radiator end tanks and coolant circulates around this tube in turn cooling the ATF.

As long as the ATF is fresh (Dexron II/III) and you have a clean filter, the OD unit should survive hard use if it's not engaging/disengaging.
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Old Jul 2, 2007 | 06:55 PM
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Ok - doesn't sound like a good idea to remove the cooling lines.
Thanks, Bob
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Old Jul 2, 2007 | 07:06 PM
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Originally Posted by red86vet
Ok - doesn't sound like a good idea to remove the cooling lines.
Thanks, Bob
Well...not if you want to drive for more than 10-12 miles anyway.
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