Blowing Gauge Fuse & Stuck in limp mode

I have a 1994 Chevy K3500 6.5 turbo diesel with a 4L80E transmission. Within 5 seconds of turning the ignition on the gauge fuse blows. Plus the batteries are discharging almost immediately...showing only 11.83 volts when the truck is running. I have already had the alternator tested and it is fine. I am also having troubles with the transmission. It has been stuck in limp mode only getting second and reverse. I have installed a new tranny already, and have the same problem. I have also changed both speed sensors already but to no avail. Any advice would be appreciated.

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Anonymous

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Posted on Oct 18, 2009

Anonymous

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I have the same problem and I have not yet found the solution. I am going to start by checking the wiring to the trans from the ecu but I doubt that is the problem. I am going to take a look at the shift solenoids, vss, range mode selector and torque converter clutch solenoid. Any ideas?

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edward80

160 Answers
Posted on Jun 04, 2009

SOURCE: 4L80E Diesel Transmission Replacement

the gas tranny should work. gm was pretty good about keeping the same bolt pattern.

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