Troubleshooting 4L60E transmissions
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*Has the system been scanned for codes and code history? | *Has the system been scanned for codes and code history? | ||
| − | == | + | ==Drivability problems== |
Has the transmission lost reverse? Has it also lost 2nd gear and 4th gear (overdrive)? | Has the transmission lost reverse? Has it also lost 2nd gear and 4th gear (overdrive)? | ||
| − | If those are the problems, suspect that the drive shell has broken or has stripped out splines. When the drive shell fails, the results is no reverse, 2nd gear or 4th gear. Check for there being three complete shifts of the forward gears. Shift 1st to 2nd gear, then shift 2nd to 3rd gear, then shift 3rd to 4th gear (overdrive). | + | If those are the problems, suspect that the drive shell has broken or has stripped out splines. When the drive shell fails, the results is no reverse, 2nd gear or 4th gear. Check for there being three complete shifts of the forward gears. Shift 1st to 2nd gear, then shift 2nd to 3rd gear, then shift 3rd to 4th gear (overdrive). |
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| + | ===4L60E=== | ||
| + | 3rd gear is all the transmission will have if there is no power to it. If the transmission has 1st gear, it has power to it and is allowed to have 1st gear by the ECM. | ||
==Scanner== | ==Scanner== | ||
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