4l80e

RV and bus conversion info since 1996.

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4l80e

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
4l80e	michael	1-1-08
I have a 93 chevy 3500 with the 4l80e, pulls out strong in first gear then when i floor it, it will shift into second gear and then stay in second, also speedometer is not working...any ideas please help
Re: 4l80e	BUBBA THE BUS TECH	1-2-08
It sounds like a related problem, the computor should be setting a code, getting it scaned may tell you where to look. My guess is the output speed sensor is bad (I forget what chev calls it) orr the wiring in between. A while ago chev also had an item they called a Drak(I think). it took the sensor input for the speedo and split it to trans computor, engine computor, cruise control and speedo. The symptoms you have sugest that no speed signal to anything. So the drak could be bad, but this is rare. More likely sensor or wireing wiring gets more likly the more miles on the unit. Good Luck