Thread: automatic shift points

Quote: Originally Posted by Ciege Greg........I'm looking at the following mods: 4.10 gears, Corvette servo, K&N intake, Flowmaster Cat-back, Diablo Predator tune. My question is when I do the tune will I /should I make adjustments to the shift points, pressure? Do you know what those adjustments would be? Be careful adjusting line pressure in the trans, more is not always better. The servo alone should give you a nice...

Quote: Originally Posted by Greg Ducato Yes. it is around 1600-1800 rpm, that is one of the reasons the SSR is a bit sluggish off the line. Greg, what the stall speed is on a stock 03/04 converter?

Greg I was wondering what the stall speed is on a stock 05 converter is. I figured maybe 1800rpm but can you tell me for sure poppa

not having second thoughts are we

Shift points shouldn't have changed but the speed (mph) where they occur will be about 10% lower that with the 3.73. I think overall the driveability should be much improved.

Quote: Originally Posted by abadssr not having second thoughts are we RRR don't listen to this guy.....once you get it "broken in" do some full throttle take offs...... see the difference...I have the 3400 stall speed converter andd the corvette sevor....and 456 gears......also a good tune I just put the trans in 3rd and let the trans do the work...

This is all correct. When you input the new gear ratio in the software it automaticly converts all the shift point (mph) according to the desired shift (rpm).

Quote: Originally Posted by Greg Ducato Your PCM is looking at the output shaft speed signal and determining shift points based on the faster rotational speed you now have. Your MPH shift points will be a bit lower with the new gears, but then the trans isn't working as hard either. Not to confuse the issue, but doesn't the fluid pressure have some effect on the shift point?

Quote: Originally Posted by RUN ROD RUN So then ... their no need to reprogram the shift points. Thanks to the experts and I'll try the 3rd gear of fun. Jeff, you are suppose to drive it, not have it drive you nuts!

Quote: Originally Posted by Greg Ducato Your PCM is looking at the output shaft speed signal and determining shift points based on the faster rotational speed you now have. Your MPH shift points will be a bit lower with the new gears, but then the trans isn't working as hard either. Greg........I'm looking at the following mods: 4.10 gears, Corvette servo, K&N intake, Flowmaster Cat-back, Diablo Predator tune. My question is...