Optimal Automatic Shifting Points
JK Newbie
Joined: Sep 2011
Posts: 24
Likes: 0
From: Redondo Beach, CA
Thanks again for your help JPop.
FYI, I was poking around in the Diablo this evening. Here's how it is currently set (factory):
1st to 2nd
8%: 1439.95
10%: 3071.90
15%: 5855.81
25%: 9311.70
2nd to 3rd
15%: 801.58
20%: 1603.16
25%: 3259.76
45%: 5183.56
WOT for 1-2 & 2-3 is 5600 RPM.
These settings are a bit unusual. 1-2 for 25% is at 9311 RPM. Red-line is 6K. I'd never hit that. Similarly, 15% for 2-3 is at 801 RPM. I don't think the RPM's ever get that low when going form 2-3. Very strange.
It doesn't look like i'd want to set every % option at max torque. Any suggestions on where to start is much appreciated.
Thanks everyone!
FYI, I was poking around in the Diablo this evening. Here's how it is currently set (factory):
1st to 2nd
8%: 1439.95
10%: 3071.90
15%: 5855.81
25%: 9311.70
2nd to 3rd
15%: 801.58
20%: 1603.16
25%: 3259.76
45%: 5183.56
WOT for 1-2 & 2-3 is 5600 RPM.
These settings are a bit unusual. 1-2 for 25% is at 9311 RPM. Red-line is 6K. I'd never hit that. Similarly, 15% for 2-3 is at 801 RPM. I don't think the RPM's ever get that low when going form 2-3. Very strange.
It doesn't look like i'd want to set every % option at max torque. Any suggestions on where to start is much appreciated.
Thanks everyone!
JK Super Freak
Joined: Oct 2012
Posts: 1,225
Likes: 0
From: OCEAN SPRINGS, MS
I have often wondered what stock shift points are set at, why and at what throttle position. Shifts are sluggish. Early sometimes. Late the other. The downshift hesitation is absolutely ridiculous. Line pressure I wish was bumped up. I think an aggressive valve body and upping the line pressure would help. But finding your sweet spots vs what someone like may be difficult.
After my built transmission in diesel a few years back. It was tough to get it right. Converter lockup, and when it locked up. Line pressure along with what rpm and under what load did it shift. I have friends who have 10k in their trucks transmission and it seems like its months before they get them to shift appropriately and not bang or jerk into gear.
Just be patient but don't settle for nothing short of what you want.
After my built transmission in diesel a few years back. It was tough to get it right. Converter lockup, and when it locked up. Line pressure along with what rpm and under what load did it shift. I have friends who have 10k in their trucks transmission and it seems like its months before they get them to shift appropriately and not bang or jerk into gear.
Just be patient but don't settle for nothing short of what you want.