Shift points and firmness in Edit??
08-20-2003, 07:41 PM
#1
Shift points and firmness in Edit?? What area's are the best to adjust to get the correct shift points and how do you raise line pressure?
I have a 01 Silverado that had shift points at 5000rpm but need to raise them to 6200-6400rpm due to a Cam change.Is it as easy as adjusting shift points?or do you have to adjust the speed(mph)too?
Thanks
I have a 01 Silverado that had shift points at 5000rpm but need to raise them to 6200-6400rpm due to a Cam change.Is it as easy as adjusting shift points?or do you have to adjust the speed(mph)too?
Thanks
08-20-2003, 10:00 PM
#2
Re: Shift points and firmness in Edit?? You have to adjust both the RPM and MPH on the transmission setup. Adjust for Normal, Hot, and Performance on the main tab.
The shifting needs both the MPH and RPM perameter to be met before the transmission will shift. The first perameter hit sets the tranny up for shifting, the second perameter, when it is met, will actually shift the transmission. It is best to setup the MPH and RPM limiters within a couple hundred RPM from each other.
Use the diameter of the tire, the rear-end ratio, and the tranny gear to calculate the RPM that will correspond to the shift.
If you are using drag radials, it is best to spin it up on your dyno and match the dyno RPM to the engine RPM to determine the actual tire diameter since there is alot of tire expansion with drag tires at speed.
Line pressure is raised on the tranny tab as well. Be careful though raising this too much will cause him to start chewing through transmissions. I only raise this to a maximum of 120 on race applications only. Usually, just eliminating TM will make the tranny shift plenty hard enough.
Good Luck
The shifting needs both the MPH and RPM perameter to be met before the transmission will shift. The first perameter hit sets the tranny up for shifting, the second perameter, when it is met, will actually shift the transmission. It is best to setup the MPH and RPM limiters within a couple hundred RPM from each other.
Use the diameter of the tire, the rear-end ratio, and the tranny gear to calculate the RPM that will correspond to the shift.
If you are using drag radials, it is best to spin it up on your dyno and match the dyno RPM to the engine RPM to determine the actual tire diameter since there is alot of tire expansion with drag tires at speed.
Line pressure is raised on the tranny tab as well. Be careful though raising this too much will cause him to start chewing through transmissions. I only raise this to a maximum of 120 on race applications only. Usually, just eliminating TM will make the tranny shift plenty hard enough.
Good Luck
