A scan tool read "Gear 3 ratio" was out of spec. Any clues why? I noticed a buzzing noise at idle and firmer shifts after installing my Transgo valvebody recalibration, but figured the latter is just part of the shift kit 'improvements.'

 

When posting a question about a Diagnostic Trouble Code it is helpful to cite the specific four-number Code.

Did the Check Engine Light go on? Did this problem develop immediately after installing the TransGo kit?

 

The Check Engine Light didn't turn on and the code wasn't stored after the Transgo install.

All I know is the ODBII scan tool mentioned an error with gear 3 and when leaving the transmission in 'D' with O/D off the car seems to hesitate more so than the '2 & 1' gears.