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Thread: Converter keeps locking in 4l80e

  1. 04-03-2019 #1
    qwkvert
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    Converter keeps locking in 4l80e

    This converter constantly locks on the second and third gear shift then immediately unlocks. Its gonna break or my input shaft is gonna break if I cant get this figured out quick. please look over my trans tune and give me some advise??? I moved all the lockup points to like 256 tonight in a final ditch effort, to no avail..
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  2. 04-03-2019 #2
    qwkvert
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    btw, thanks for any and all input in advance.
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  3. 04-03-2019 #3
    qwkvert
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    This is in a 2003 1500 4l80 swapped with 4k converter


    Protocol Info: SAE J2178, VPW

    ECM: 10, VPW - P59, GM Gen3 V8, 4.3L V6
    VIN: 1GCEC14V53Z359613 - 2003 Chevrolet Silverado 1500, 4.8 L, 8 Cyl
    Serial: 0HA0ACW03169
    OS: 1260050
    Calibration IDs: 12579405, 12577871, 12579428, 12585421, 12570845, 12578354, 12572569, 12572540
    Calibration VNs: 00007C75, 0000B92E, 00002FA0, 0000CF60, 0000A1AF, 0000BDFA, 0000B4AE, 00007520
    Basic PIDs: 22
    Trouble Codes:
    Controller Type ID By OS: 5120
    Diagnostic Requirements: None
    Scanning Methods: ISO 15031-5 Mode 0x01 Functional
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