2011 Caprice Converter slippage

Drivetrain discussion including Transmission, Differential, Driveshaft, and related items.
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Welder350fd
Posts: 2
Joined: Wed Sep 04, 2019 11:00 am

2011 Caprice Converter slippage

Post by Welder350fd »

I have a 2011 caprice PPV with 43k on the clock. Recently did a cam swap/DOD delete. The car runs fine (still some tweaks to make), but I am working on the trans tuning now. I have my shift points and everything just about where I want them. The problem I am coming across now is that the converter doesn't always want to lock up properly. I know these systems are very finicky and the converters are meant to slip some, I have been reading forums for the past few days on this issue. I have a couple questions, 1: has anyone figured out how to properly "lock" these converters yet? 2: since I assume no one has been able to do that yet, how can I eliminate my slip as much as possible? Attached is my current tune and a log from today on my way to work. sometimes I can cruise at 70mph and 1800 rpm ish and i see some converter slip between 0 and 50 (27:35 into the log). at 31:41 to 31:46 in the log you can see that slip jumps up a lot when slightly let off the throttle (not completely let off). Is there a way to fix that? this slip can be seen again at 34:29 into the log when slightly letting off the throttle. At 36:05 to 37:21 into the log I am seeing upwards of 200 rpm slip for over a minute at 70 mph for some reason, according to the tune this should be "locked" or atleast a few rpm slip. I have turned off missfire codes in my tune and that has not helped the converter issue at all. sorry for the long post just want to give as much info as possible. Tune and Log file link attached.

https://drive.google.com/file/d/1aqzrE3 ... sp=sharing
https://drive.google.com/file/d/12dct8W ... sp=sharing
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smwalker
Administration Staff
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Joined: Mon Jul 29, 2013 1:44 am
Location: Azusa,CA

Re: 2011 Caprice Converter slippage

Post by smwalker »

Do you have the factory pan on the trans? Or have you done the upgrade to the deep pan? Could fluid starvation cause the TC slip?
Steve Walker
Azusa, CA
'11 PPV 9C3 Huron White
Welder350fd
Posts: 2
Joined: Wed Sep 04, 2019 11:00 am

Re: 2011 Caprice Converter slippage

Post by Welder350fd »

stock trans, stock converter, stock pan.
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