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  1. L

    4L60E Issue

    Just waiting for the hoist to be available to drop the pan much nicer than laying in the dirt.. did discover that when at lock up if I tap the brake pedal to unlock the converter it unlocks smoothly so my guess that it could be something else
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    4L60E Issue

    I believe that this is exactly what is going on. Would like to do a road test but going to have to have somebody ride along to watch scanner since the roads are very icy/snow covered and I’ll have to do it on the highway to get up to lockup.Connected the scanner today at lunch in the parking lot...
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    4L60E Issue

    I have been having issues with my 4L60e in my 97 Tahoe, in over drive on the highway at a lower rpm approximately 1200rpm i get a strange shudder or almost a clunk as the transmission shifts from overdrive to third gear, If I snap the pedal quickly and give it more throttle than usual it seems...
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    Powertrain jolting at highway speeds

    Brought out the multimeter again and figured it, out my ground wire was ripped in half inside the connector for the cam sensor. Spliced a new connector in now I got it timed to 0* no more issues/codes
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    Powertrain jolting at highway speeds

    P0340 camshaft position sensor A circuit
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    Powertrain jolting at highway speeds

    This big Issue turned out to be the distributor, also found that one of the wires for the cam position sensor got pinched at some point.Running much better now with no misfires but still can’t achieve +2* to -2* camshaft retard degrees with the scanner it seems to still be defaulting to -45* no...
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    Powertrain jolting at highway speeds

    I have put new plugs in last year since the ones that were in there were very old, it’s got a junk yard distributor in it right now and i have a feeling it’s not very good the only way I was able to get the timing correct on the scanner was to turn it clockwise to the point where it was very...
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    Powertrain jolting at highway speeds

    Trans fluid is perfect and filter is fairly new.. probably gonna pull the distributor and look it over since they are known to cause issues if I don’t find anything when I check cam/crank sensors+circuits again
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    Powertrain jolting at highway speeds

    Does it in third also must be a misfire
  10. L

    Powertrain jolting at highway speeds

    Do you mean shift it down into third gear rather than drive? It happens in drive only from what I’ve seen..I Tryed putting it into third and drove for a little bit and it did not continue to clunk/jerk intermittently from what I remember.. that’s why I figured it was something with the...
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    Powertrain jolting at highway speeds

    All I have for a code is a p0340 circuit a for a long time that I’ve never been able to figure out.. all of the readings I took for the 3 wire sensor circuit were okay and the sensor is new. Truck had this code and ran normal until recently, checked the wiring now about 5-6 times looking for...
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    Powertrain jolting at highway speeds

    Clunk/jolt will occur in final gear once I let off throttle usually every time
  13. L

    Powertrain jolting at highway speeds

    Started by checking distributor/wires which all look good..I’ve been having this ongoing issue with my 1997 Tahoe with 5.7 and 4l60e where at light to mid throttle especially at aprox 50-60 mph where something is causing a intermittent aggressive clunk/jolt. Just wondering if anybody had...

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