4r100 Question
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4r100 Question
I have a early 99 with the 4r100 trans. Under light load and light acceleration after it shifts into overdrive, the converter will lockup then unlock quickly and then lock back up. I have the 1705 superchips programmer in, but it does it stock also. I also have done the sonnex valve and tricummulator springs. If I am pulling a trailer or harder into the throttle, it does not seem to do it. Any ideas???
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Originally Posted by chesterstroker
I have a early 99 with the 4r100 trans. Under light load and light acceleration after it shifts into overdrive, the converter will lockup then unlock quickly and then lock back up. I have the 1705 superchips programmer in, but it does it stock also. I also have done the sonnex valve and tricummulator springs. If I am pulling a trailer or harder into the throttle, it does not seem to do it. Any ideas???
As you probably know......the TC lockup is a grounding of a wire from the PCM. It locks the TC acourding to RPM, load.......but mainly speed. After checking the wiring down to the transmission connector for possible damage. Making sure that the connector is seated......I might want to take a look at that vss sensor on the top of the differential. It may not be bad.......but I'd pull it out, and see if it has picked up some steel fillings, etc. This may be making the measured speed signal erratic. Just some things to check.
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