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  #1  
Old 02-17-2012, 01:49 PM
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modified EPC solenoid

After having a problem a delayed shift on WOT with the SRL tune I threw in an EPC solenoid to see if that would fix it. It didn't seem to have an effect on it. I loaded the SCT performance tune and it didn't delay at all but then again that tune was really disappointing coming from the srl. I might try reload the srl onto the SCT and see if that helps.

I'll post a write up with pics to modify the EPC solenoid, its real easy!
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Old 02-17-2012, 01:52 PM
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School me what exaclty is it and what does it do
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Old 02-17-2012, 02:02 PM
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It should give you about 15% more volume of fluid with added pressure to the direct clutch. Its for harder 3-5 shifts.
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Old 02-17-2012, 02:20 PM
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Is it somethin you buy or mod
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Old 02-18-2012, 10:00 AM
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The EPC solenoid I got from the dealer after CKguy recommended this alternative to the gogo solenoid. Pizza Pig then filled me in on what had to be done to it to make it fit. THanks guys! Heres a little write up to get it done,

Drain fluid from pan.
Remove bolts holding pan on.
Remove filter assembly.
Remove C clip from middle rear solenoid.
Slide sol. out while twisting and pulling.
Grind down tabs on new EPC solenoid (be sure to cover all openings)
Install new solenoid and C clip
Install new filter, and bolt on pan.
Fill and Drive.

Here's some pictures to help before diving in!

















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  #6  
Old 02-18-2012, 10:08 AM
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Heres a pic of my pan after I dropped it. I heard it was normal to have the magnet covered in a slurry, I also found some dark flakes in there, minimal, and one tiny shaving if metal that obviously come from somewhere it shouldn't have. I'm not sure how bad this is but here it is. This is the first time I dropped the pan so I don't have anything to compare it too. THe tranny was flushed by for about 20K ago. And the only problem I have is with the delayed 3-5 shift at WOT







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  #7  
Old 02-18-2012, 12:36 PM
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the dark grit is clutch material, the sliver is likely from a bearing or planetary.

a trans flush won't clean off the magnet, obviously the only way to do that is by removing it. The extra buildup could just be from normal accumulation

with all that crap in the pan I'd change out the external filter soon too
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Old 02-18-2012, 01:21 PM
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So is this a factory upgraded thing or one out of a diff model
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Old 02-18-2012, 03:55 PM
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This is a factory, stock EPC solenoid, from what i gathered it is the solenoid that provides fluid to all the other solenoids, hence the additional pressure and volume. From what others have said, it provides a hard 3-5 shift that some do not like. I have not noticed any additional benefits, leading me to beleive that maybe my EPC solenoid (the one in the stock location above the valve body is worn. I may by another EPC and remove the valve body and install it to see if that helps crispen up my shifts.

Sinner, thanks for the input, I'll change the external filter this week. Does that have anything to do with line pressure? I would think so since the oil cool is not high pressure.

Check out "shift Flare 3-5" thread in general forum for additonal input on this.
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  #10  
Old 02-18-2012, 05:54 PM
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Nah, it only filters a percentage of fluid flowing through the cooler, it is however the primary filter in this transmission so it's correct operation is critical.
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