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Old 08-29-2011, 03:36 PM   #1
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Default torque converter lock up issues

I have a freshly rebuilt/beefed up 4l60e with pwm disabled via transgo hd2c kit and a tci 4L60E Race Torque Converter 10" LS1 w/ 3800 Stall Speed that was refreshed by tci when the transmission was rebuilt and
dan at masport speed shop tuned for the converter..

The problem: looking on a snap on scan tool the transmission is commanding the converter to lock up but it just wont... the only time i can really get it to lock up is if im going 80-85mph and then its kind of hit and miss

so my question is with all these new parts and tune what would keep my torque converter from locking up? the only parts that are not new in this combo are the transmission electrical components..
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Old 08-29-2011, 03:46 PM   #2
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Either the misfire tables in the tune need adjusted, OR the clutch lining on the tci converter is trash. A friend of mine on here literally had to send his converter back to tci 3 TIMES for this issue. It could be just a tuning issue though, otherwise, i'd say drop the pan and look for a black substance in the fluid.
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Old 08-29-2011, 03:52 PM   #3
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Either the misfire tables in the tune need adjusted, OR the clutch lining on the tci converter is trash. A friend of mine on here literally had to send his converter back to tci 3 TIMES for this issue. It could be just a tuning issue though, otherwise, i'd say drop the pan and look for a black substance in the fluid.
i was under the impression if it detected misfires it wouldnt command the converter to lock up..? the converter has just been refreshed, and the fluid is clean.
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Old 08-29-2011, 04:25 PM   #4
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Misfires would be a reason that the converter isnt locking up. Is your car throwing any SES codes?? Could also be line pressure in the trans is not adjusted accordingly. I would call your tuner and find out what your tables are set at and go from there.
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Old 08-29-2011, 04:27 PM   #5
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Misfires would be a reason that the converter isnt locking up. Is your car throwing any SES codes?? Could also be line pressure in the trans is not adjusted accordingly. I would call your tuner and find out what your tables are set at and go from there.
zero codes, and she doesnt misfire..
she used to run pretty rich but i think i got that figured out with a map sensor loose in the intake
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Old 08-29-2011, 10:27 PM   #6
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If you are using a scanner to verify that the PCM is commanding lockup... Then indeed it is commanding lockup and the problem is not misfires.

In my opinion you need to remove the TCI converter, set it in a large steel can marked junk ane go buy a nice torque converter. I am not being a smart ***. I am giving you the best advice a 25 years professional in the industry can give you. In my career I have replaced more defective torque converters from that company than any other company.

Do your self a favor and make it go away friend!

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Old 08-29-2011, 10:44 PM   #7
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Yeah, I planed on it for the 4l80e but I got a good deal and a refresh.. Figured I would be good for a year or two.. When it does lock up it feels good and firm
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Old 08-30-2011, 05:03 AM   #8
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Give me a shout today... I'd like to discuss this issue with you in detail. If it feels firm when it does lock up then indeed the converter may be in good shape.

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Old 08-30-2011, 10:42 PM   #9
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You can also replace the torque converter clutch solenoid it could be stuck.....
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Old 08-30-2011, 10:58 PM   #10
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You can also replace the torque converter clutch solenoid it could be stuck.....
I was thinking that as well but then I started thinking if that was the case why would it only lock up at 80-85mph and not just randomly at any commanded time
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Old 08-30-2011, 11:17 PM   #11
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So basically what conditions would be different at 80-85mph compared to normal lock up speeds besides rpm. Im rusty on transmissions but line pressure must be one.. But in that case technically I should be able to drop it to third match rpms and get it to lock up lower then 80-85.. Granted IV never tried that but i dont think it will happen but I'll try tomorrow
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Old 08-30-2011, 11:55 PM   #12
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Two friends did the same thing. Common with tci converters, I dont know what causes it.

Either way, i would pull it and get a quality converter.
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Old 08-31-2011, 12:08 AM   #13
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Im not replacing a brand new converter till I know that it is infact the problem.
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Old 08-31-2011, 12:08 AM
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4l60e, camaro, converter, disable, lock, lockup, ls1tech, misfire, pwm, speed, tcc, tci, torque, transmission, tunem


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