1-2 Shift Issues After Converter
Thread Starter
Instructor
Joined: Dec 2009
Posts: 146
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From: Orlando FL
1-2 Shift Issues After Converter
I have a 2000 C5 Corvette with a stock 4L60 and an FTI 3600 converter. Prior to the converter installation, my transmission would make the 1-2 shift at WOT no problem. Ever since the converter, the converter will hit the limiter at ~6600RPM for about 0.5 seconds before it shifts into 2nd. I can get it to shift into 2nd if I manually go from 1 to 2 at about 5000 RPM, but it doesn't go into 2nd until ~6200 RPM.
It shifted fine before the converter. When we put the converter in, we also put in a 3.42 rear differential out of a Z06 and upped the line pressure to 99%. The shift points are roughly the same, but we tried plenty of combinations to get it to shift properly to no avail.
Any ideas or suggestions are greatly appreciated!
It shifted fine before the converter. When we put the converter in, we also put in a 3.42 rear differential out of a Z06 and upped the line pressure to 99%. The shift points are roughly the same, but we tried plenty of combinations to get it to shift properly to no avail.
Any ideas or suggestions are greatly appreciated!
Thread Starter
Instructor
Joined: Dec 2009
Posts: 146
Likes: 0
From: Orlando FL
We played around with the shift points but it never cooperated. I'll re-check the fluid. I think it leaks a tiny bit of tranny fluid so I'll pinpoint that, fix it, fill it up, get it tuned, and hopefully that fixes it.
It also doesn't seem to need a cooler. I watch the tranny temps and they've never crossed 195F since I put the converter in. BEFORE the converter, they used to hit 220 or so. Bizarre...
It also doesn't seem to need a cooler. I watch the tranny temps and they've never crossed 195F since I put the converter in. BEFORE the converter, they used to hit 220 or so. Bizarre...
Last edited by BTow1105; May 21, 2011 at 03:31 AM.
Drifting
Joined: Jul 2007
Posts: 1,352
Likes: 19
From: In a house
That's one thing I always hated ... Making more than one mod at a time and then trying to figure out what was wrong. Sounds crazy but I would put the old diff back in and isolate the converter if you can't get it right.... At least then you can be sure your converter isn't the culprit
Thread Starter
Instructor
Joined: Dec 2009
Posts: 146
Likes: 0
From: Orlando FL
That's one thing I always hated ... Making more than one mod at a time and then trying to figure out what was wrong. Sounds crazy but I would put the old diff back in and isolate the converter if you can't get it right.... At least then you can be sure your converter isn't the culprit
