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Delayed shift when 50% or more throttle??

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Old 06-20-2019, 11:55 AM
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Default Delayed shift when 50% or more throttle??
Has anyone else experienced the shift delay due to the TCM being off once the jeep has been lifted or supercharged?

2009 3.8 auto
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Old 06-21-2019, 10:39 AM
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Anyone know or have this issue ?
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Old 06-23-2019, 04:06 AM
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Had issues with my daughters after the dealer decided to flash her ECM while it was in for an oil change. Jeep had a superchip loaded for gear and tire size change in it at the time and it never shifted the same, Dealer would not rectify the problem. So I contacted Mike at OST Dyno as a friend gave me his info and he was able to fix the issue. It did take a second flash to get it exact but it shifts perfect with 40's.
https://shop.ostdyno.com/shop/produc.../tcm-flashing/
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Old 06-23-2019, 12:06 PM
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Originally Posted by nevrnf
Had issues with my daughters after the dealer decided to flash her ECM while it was in for an oil change. Jeep had a superchip loaded for gear and tire size change in it at the time and it never shifted the same, Dealer would not rectify the problem. So I contacted Mike at OST Dyno as a friend gave me his info and he was able to fix the issue. It did take a second flash to get it exact but it shifts perfect with 40's.
https://shop.ostdyno.com/shop/produc.../tcm-flashing/
Hmmm I have a diablo predator tuner that came with it. And you can adjust a the part throttle upshifts. But I’m not competent enough to start messing with it. The presets seem very odd but it does shift ok?
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Old 06-25-2019, 01:01 PM
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Ok I think I found the issue. Is anyone familiar with how to adjust the part throttle shift rpms ? ?
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