Thread: 8l90
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Old 05-17-2021, 05:35 PM
dhutton dhutton is offline
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Quote:
Originally Posted by dontlifttoshift View Post
Right, but the ECU doesn't know what tire diameter or gear ratio you have. Consequently the shift strategy is based false information. It's close for a lot of applications but with a 31" tire it won't shift the way it should.
I was thinking the same thing. The ZL1 uses 2.85 gears with a 27” tall tire so it’s similar to 3.73 gears with 31” tall tires if I did the math right. Got me wondering what the Connect and Cruise tune assumes.

Don
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