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Pull a 18 ft box trailer everyday have programer on it runs awsome

K

Do what I do not understand

How would you determine for sure it's not an electrical issue

Could it be the solenoids that's the only thing I can think of that was not changed

Also the heat indicator for heat settings all flash all the time

I used a scan tool and scanned and come up with about seven or eight different codes which are 13 oxygen failure 43 electronic spark control failure 39 torque converter clutch error 68 overdrive fault 86 solenoid b stuck on 85 unidentified ratio / PCM and also my heater is haywire

A shop done it

It's fresh rebuild new speed sensors new vssb

When you're running 60 mph down the road the speedometer is showing 45

It was rebuilt

4080e it's in a '93 dump truck two-wheel drive shifts into first the second and then shifts back in the first unless you let off the gas does the same thing and second and third and then kicks out of overdrive going down the road and will not kick back in unless you shut it completely off and...

I have a 93 454 3500 HD dump truck freshly rebuilt transmission 4L80E my speedometer is 15 mph off when it shifts it doesn't matter if it's first or second to third or third or overdrive it shifts and then shifts back down going down the road it'll lose overdrive and will not shift back in any ideas