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  1. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hi everyone! I know this has been covered in a few threads, but I have some symptoms not all. So here's the thing, two months ago after a long trip I felt my TB have a hard 1-2 upshift. It has been the bane of my existence since then. In that time to try and figure everything out, I have...
    hard shift tcc transmission
  2. OEM Issues
    My truck is shuddering in overdrive when driven at constant speeds and constant loads. Pressing the gas to take it out of lockup results in a harsh release of the clutch. No codes found. I have a scanner that reads transmission, abs, airbag, etc. At 55mph, constant load, level ground (for...
    4l60e shudder tcc trans transmission
  3. OEM Issues
    Hi All, For my first post here, I'd like to get some input on what I might be dealing with. I got my 08 Trailblazer LT (4.2) about a year ago, and ever since I've been dealing with the TCC intermittently locking/unlocking over and over, along with some other shifting issues. The TCC...
    lock tcc torque converter transmission unlock
  4. OEM Issues
    I have a 02 Trailblazer with I6 and automatic tranny with 98xxx miles. When the vehicle is cold I have a whining sound (kind of like a fan rubbing up against something which sounds like it is coming from the Tranny) that starts just before shift and last through the shift. As the vehicle...
    tcc tranny whining
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