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| − | =Basic details on troubleshooting 4L60E transmissions.=
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| − | It takes some working knowledge on the electronic controlled transmission to determine if the problem is engine, transmission or chassis related cause.
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| − | Common questions to answer are:
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| − | *Does the speedometer function correctly?
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| − | *Does the in dash shifter indicator function correctly?
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| − | *Is the check engine light on?
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| − | *Has the system been scanned for codes and code history?
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| − | ==4L60-700r4-4L60E Drivability problems==
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| − | Has the transmission lost reverse? Has it also lost 2nd gear and 4th gear(over drive)?
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| − | If that is the problems, I would suspect the drive shell has broken or stripped out splines. When the drive shell fails, the results is no reverse, 2nd gear or 4th gear. Check for 3 complete shifts in forward gears. Shift 1 - 2nd gear, then shift 2 -3 gear, then shift to 4th gear (overdrive)
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| − | ==Scanner==
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| − | A good quality scanner is needed. Not a code reader device. A scanner that can read codes, clear codes , can read a live data stream as the trans is controlled by the PCM.
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| − | Some scanners can take over control of the transmission for a better diagnostic test of the operation as the vehicle is driven
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| − | [[Category:Transmission]]
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| − | [[Category:Undeveloped articles]]
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| − | [[Category:Troubleshooting]]
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