The factory is also a lockup type and is a way to advertise a 3 speed transmission with Overdrive (a 4 speed) as a 5-speed with 5th being lockup, or direct. It isn't an extra "gear", but is sold as one!!
The Overdrive lockup is controlled by the ECU and is unfortunately, hard-coded.
The factory shift points on the QC are controlled by tuning, and shift way too early at wide-open throttle; Particularly into Overdrive which lugs the engine at a time when the truck is trying to punch through a lot of air.
I had my 3-4 shift increased to 120 miles per hour which stays at the top of the shocks after the shift.
Fun stuff!!
The Overdrive lockup is controlled by the ECU and is unfortunately, hard-coded.
The factory shift points on the QC are controlled by tuning, and shift way too early at wide-open throttle; Particularly into Overdrive which lugs the engine at a time when the truck is trying to punch through a lot of air.
I had my 3-4 shift increased to 120 miles per hour which stays at the top of the shocks after the shift.
Fun stuff!!
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