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Old 09-15-2015, 07:58 AM   #1
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question on tc..

I have installed a edge 2600 stall converter. Have about 700 miles on it. When I first put it in along with cam swap, when it got to around 2500 rpm it would throw u back in the seat and pull like a scolded cat. But I have noticed that feeling it not there anymore. Any ideas. So I rechecked trans fluid cold and it was up past the hot mark. I said what.... so I warmed up the truck, test drove to get fluid hot, rechecked fluid and it is in between the two hot dots. Perfect... I'm confused. Hope converter has not failed.

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Old 09-15-2015, 09:15 AM   #2
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Iv read about converter drain back. Is this an issue. It just doesn't feel like it's locking up.
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Old 09-15-2015, 09:52 AM   #3
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It has to be running to check normally warm gets a better reading by allowing fluid to circulate and actually heat up some. The converter will drain back a little over night and the clutches will empty out some also so if you check off it will read high
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Old 09-15-2015, 10:47 AM   #4
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Keith, is there a way I can check to see if it's locking up. Something is definitely different than it was when first installed.
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Old 09-15-2015, 11:36 AM   #5
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You should be able to feel it lock around 45mph and if it wasn't working hokding wose locked up it would throw a code for lockup ratio error. Now the converter itself may have an issue. You say it is a 2600 power brake it see where the rpm stop climbing or the tires spin they the brakes should be right around 2600
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Old 09-15-2015, 11:43 AM   #6
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Will check when I get home. I have a snapon scanner to read cvi numbers and what not. Just don't know what I'm looking for. Lol...
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Old 09-15-2015, 01:25 PM   #7
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CVI numbers are more for clutch pack wear indications. Check the fluid when you get home hot and see where it's at. Go for a drive under ttansmission and watch tqslip or lockup percent slip in full lock it should be less than 50 diff from dash board.
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Old 09-15-2015, 08:21 PM   #8
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Another test I read was to apply light brake pressure while driving and rpms should either increase or decrease. I tried this several times and there was no change at all in rpms. Any input. Forgot scanner on the drive to my parents house.
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Old 09-15-2015, 08:43 PM   #9
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That test is hard to do on a newer vehicle since the computers are so fast.
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Old 09-15-2015, 09:16 PM   #10
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Seems I remember that the normal lockup is a modulated signal that was designed to mask the TC lockup to soften the transition. This would make the actual lockup point difficult to detect. I was told by my transmission guy that the TC lockup should be the last event, this means it goes through the gears using the TC slippage to again soften the shifts and then finally locks up. On the 03 you can turn off the OD which puts you in third gear. Maybe try to hold the speed steady and note your rpm, then turn on the OD. Try to detect the gear change and TC lockup. This should be two events, but as mentioned the lockup is modulated. If nothing else at this point you can calculate rpm to speed change to confirm both events occurred.
On my 46RH TC lockup is just a on/off switch and when the TC locks up it feels like an actual gear change. Just as an example of what a TC lockup can feel like.
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