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  1. J

    Whipple Supercharged Performance

    Is that CARB certified with an EO? If so, I would assume that's why the tune is locked. Beauty addition!
  2. J

    05 Tahoe line Lock

    As Americans, we have guns too. My niece and nephew from the Nederlands just visited, and at the top of thier to-do list, above Venice Beach and Hollywood, was a trip to the gun range and the dragraces... Its ok that you don't understand, that's why we have Freedom of Choice.
  3. J

    4l60e question...is it junk?

    I have an '02 Z71 4x4. I lost my trannie at 167k. Mine suffered a horrid death as the rear planetary case cracked. If you are planning to keep yours, I recommend you check out the Sonnax parts catalog and their build sheets for varying levels of performance and strengthening. Agree with...
  4. J

    03 Tahoe Z71 noises in tranny

    I have an '02 Tahoe Z71, and at 165k miles had the same issue, which screamed/screetched when put in reverse. My issue was a cracked rear planet carrier. I upgraded to the A/C Delco 5 planet carrier (amongst other things) on the rebuild .
  5. J

    CA smog fail (need help)

    I replaced mine (2002 Tahoe Z71 5.3) with the MagnaFlow 458062 Direct Fit Catalytic Converter (CARB compliant). At the time it was around $1k, but you got both Cats and fresh piping from the manifolds to the Y-pipe. Check fitment for your app.
  6. J

    Low Idle and running lean

    My 2002 Tahoe Z71 5.3 had this problem, which got worse with cold weather. I too did the O2's, MAF, etc., before I replaced the intake manifold gaskets... in this instance it cured the problem.
  7. J

    Let's talk engines and trans

    And this: https://d2q1ebiag300ih.cloudfront.net/uploads/tech_resource/617/Sonnax_4L60E_Build_Sheet.pdf?v=1578587271804
  8. J

    Let's talk engines and trans

    My question would be the intended level of the build? With S/C, streetable SUV, maybe 550hp/tq max? I'm a firm believer in Sonnax and recommend a little research there for build info...
  9. J

    Let's talk engines and trans

    Hi everyone, Did I miss something here? While I fully agree that the LQ4 and LQ9 (Gen 3) would be the easiest and most cost-effective to install, I'm getting hung up on the reference to the 4L80(e). If I'm not mistaken, significant fabrication on new trans mounts and driveshaft(s)...
  10. J

    2004 Tahoe rough start up

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