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

Tcc coast release speed

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Old Jan 18, 2018 | 03:42 PM
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Default Tcc coast release speed

89 stock auto trans, 52,000 miles

I’m not sure what this is and what effect does it have if I lower or raise speed limit. I use tunerpro rt using 6E. I have done research but can’t seem to find a answer I can understand. It’s set at 32 MPH now

Last edited by mlm0; Jan 18, 2018 at 03:42 PM.
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Old Jan 18, 2018 | 04:01 PM
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TCC release speed would be when the TCC would release if you coasted without ever depressing brake pedal. When brake is applied TCC disengages, which is the more common event. I doubt there is an advantage in altering it.

Last edited by Kevova; Jan 18, 2018 at 04:07 PM.
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Old Jan 18, 2018 | 04:03 PM
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I believe what it means is the torque converter (TCC) lock up releases (unlocks) at 32 mph.

On my 94 it drops out at 43 mph. I realize the cars are quite different.
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Old Jan 20, 2018 | 02:54 PM
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Mine locks at around 43 and unlocks at around 34 indicated by speedo right or wrong as that might be. If I step on the brakes it unlocks at any speed along with a downshift passing maneuver.
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