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4l80e shifting problem Dan999 4-5-10  
I have a 95 GMC 1 ton, tranny was rebuilt 2 years ago. For about 6 months it would drop into 2nd gear while cruising on the highway. I would pull over, shut down and restart the truck and it would shift normal again. Now it won't shift into 4th gear and there is no eng. braking. I have changed both solenoids and the speed sensor on the side of the tranny and can not find any wiring issues. What's next?
Re: 4l80e shifting problem BUBBA THE BUS TECH 4-5-10  
No engine braking means it has a serious internal failure.
Re: 4l80e shifting problem xhalil smith 4-7-10  
The engine is on and I push the brake down but the gear shift won't come out of park
Re: 4l80e shifting problem dan999 4-10-10  
It only has no eng. braking in 3rd gear, also this is a 4wd, the scanner is showing the 4wd low switch is "on" and does,t change when I shift in and out of 4 low, would this cause a problem?
Re: 4l80e shifting problem john 2-16-11  
Truck dies after about 10 feet 1994 gmc 2500 with 4L80e trans
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