ls1 edit shiftpoint need help
Thread Starter
Supporting Vendor
Joined: Oct 2002
Posts: 50,281
Likes: 518
From: Cleveland OH
St. Jude Donor '11,'13
ls1 edit shiftpoint need help
car is a 2000 a4 it has 3:42 and protourqe 2400 stall. any advice on changing shift points car seems to be sluggish on the freeway after 55mph. i mean real slugish. on the street its fast. what gives. any help would be greatly helpfull. thanks in advance 
Melting Slicks
Joined: Jun 2004
Posts: 3,439
Likes: 6
From: Newark, DE
St. Jude Donor '06
That does seem weird.Are you sure your converter is locking up on the highway? Try this, after the car is fully warmed up. Check transmission temperature when experiencing the problem at 55-60, and compare that to what you are reading when cruising normally around town. Is it lots higher at highway speed? It shouldn't be.
Here's what the Predator manual recommends for 3.42 gearset:
1-2 Upshift MPH 41
2-3 Upshift MPH 80
3-4 Upshift MPH 130
2-1 downshift 36
3-2 downshift 79
4-3 downshift 118
That should give you a good starting point.
