I am trying to figure out why my tcc slip is so high? Can I get some help? the trans is a 4L80e with a ck performance D3 valve body, a triple billet triple lock up 4300 stall converter , and I am getting 1200-1500 tcc slip in 3rd gear at 5000+ rpm. what can be adjusted to lower the slip under full throttle.
motor is a 6.0 with vsr 88mm t6 and I am only running 12# of boost.
tune and log attached.
Maybe I am asking the wrong question . Is there anything I can do to reduce the difference of rpm from the crankshaft (6500 rpm ) to the input shaft of the 4L80 (5300 rpm) with the converter not locked? some more info, the trans and converter is a new build with Less than 100 miles on it. Is there a setting that I can change?
The ecu is a 0411.
You need the torque converter stator changed. Your blowing through the converter.
Was the converter speced for this setup?
it was build for the build, it is not an off the shelf converter
Still too loose thenOriginally Posted by Spoolnsquirrels
That's because of that very high stall speed converter you have. You would need a converter dialed in better to suited your engine to fix that.
Last edited by TransGo Robert; 08-19-2023 at 12:31 PM.
What brand converter?
There are two areas on your scan that look like WOT passes.
The first one is a lot quicker and faster with less converter slip.
You are sitting still trying to build boost but only get a couple pounds at 4200 engine rpm before you start to move.
Off and on throttle a few times.....up to 140 mph......around 11.5-12 percent at 6800 in third.
On the second and slower one, I think you are referring to.........
Your 1-2 and 2-3 shifts are completing in 0.214 and 0.201 seconds.
Your IAT is a bit high at 196 degrees.
Converter definitely has lots of "slip".
14.8 and 13.7 percent before the 1-2 and 2-3 shifts.
19.1 percent top of 3rd gear at 6350 rpm
Last edited by slarsen47; 08-25-2023 at 11:53 AM.
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