[brianbgboy]

i just bought this truck, and it shifts good through 1 2 and drive. but it will not go into overdrive. a couple of times i noticed that it would take off in 2nd gear and not shift at all. i took the ground cable off the battery, and let it sit for 10 minutes, hook it back up, and back to shifting it goes, but still no overdrive. all the wiring and the trans are factory, never replaced. the ecm looks to be brand new though. could this be a programming issue, or perhaps the wrong ecm? also, should the ecm be grounded, as it is just sitting in the dash not even in a bracket currently. thanks, bgboy

[Henry Highrise]

This is a Hot rod site....What does a ton dually have to do with hotrods?

[brianbgboy]

i just thought that maybe someone out here may have some info that may help me. besides, my dually is my daily hotrod, and my weekend hotrod hauler! thanks, bgboy

[airworld2]

should be 4l80 e not 60e
you should have this truck scanned for trouble codes before you proceed any farther.

[brianbgboy]

i posted the wrong trans #. i have corrected it now. it does have the 4l80e. sorry, and thanks for the reply, bgboy

[brianbgboy]

does anyone else have a clue where to look? thanks, bgboy

[Crosley]

Originally Posted by brianbgboy

does anyone else have a clue where to look? thanks, bgboy

you received a high quality answer from airworld2:

you should have this truck scanned for trouble codes before you proceed any farther

there is a series of tests to run with a high quality scanner to help determine the area the problem is in.

Test solenoids, checks codes ( old and new) watch the data stream from the PCM to the tranny to see if the proper commands are there.

Sometimes there is no magic simple answer, you must diagnose the problem with the proper tools.