did you guys ever figure out a solution to the trans bogging down when shifting from 1-2 and 3-4?

Hey guys, ive been following this thread and am experiencing the same issues as the OP and hotrodz. Did we ever figure out a fix to this issue?

10-4

OK. i didnt figure. im not used to it holding the gears for longer periods.

does the 87 octane tune remove overdrive?

Ya, i did what you said thx. I posted this before i sent you the mssg. I appreciate the help.

Hey guys. does anyone know, on the 2014 silverado 5.3L what the canned 87 octane, firm shift is set at? i changed it to 10% but wanna try it back to what Diablo had it at in the canned setting. I thought it was 15%, but wasnt certain.