Angel
1000 Posts Club!
Agree that jolting is 100 percent the JB4. I can’t speak for other piggybacks since this is the one I have. I can’t speak about the ecu tunes either but I beleive @Tonkabob does not get that jolting but he has an ecu tune. I have personally tested their numerous times. I beleive I have posted about this complain on other threads as well. When I have the JB4 off the car shifts smooth, when JB4 is on the car on map 2 I really feel the jerking in between shifts. It more noticible when taking off from a dig between 1-2 and 2-3.I honestly dont think the "jolting" you feel during shifts is soo much from the car but the piggyback you are using. I have a JB4 and you can feel it pretty damn hard sometimes. When I removed the JB4 and got the ECU update for the ecu is was really smooth. Once the JB4 went back on the jolting began again. I think @Angel felt the same thing after a certain firmware update.