Why does my Duramax say range shift inhibited?

Why does my Duramax say range shift inhibited?

NSBU connecters are very well sealed form the factory. they have silcone inside the connector. they are very hard to disconnect. you could have bend or kinked shift linkage. I have replaced the NSBU switch, filled the transmission fluid, and it is still blinking the “Range Shift Inhibited” when I shift into Reverse.

When do I Trans Flush my GMC Truck?

I did an trans flush about 6 months ago but it started doing this 4 months after. When Reverse is under a load it’s like the truck is in N. Also just the other day the truck made a loud banging noise in drive.

Why does my GMC Yukon not shift hard?

Goes from first to second with the rpms jumping up between each gear shift. If i feather the accelerator it doesnt shift as hard. If i get on the throttle it messes up in most gears. Please tell me my transmission doesnt need to be replaced. You have a bad TCM.

How to change the transmission in a Chevy?

With a wrench keeping the shift lever from rotating, remove the nut from the end of the selector shaft. Use a file to remove any burrs or raised metal where the selector lever was seated against the shoulder of the selector shaft.

NSBU connecters are very well sealed form the factory. they have silcone inside the connector. they are very hard to disconnect. you could have bend or kinked shift linkage. I have replaced the NSBU switch, filled the transmission fluid, and it is still blinking the “Range Shift Inhibited” when I shift into Reverse.

I did an trans flush about 6 months ago but it started doing this 4 months after. When Reverse is under a load it’s like the truck is in N. Also just the other day the truck made a loud banging noise in drive.

Are there shift inhibits based on engine speed?

There are shift inhibits that are based on input speed (ie – if you’re over XXX rpm engine speed and drop to into gear, you’ll be inhibited). Output speed should not inhibit your shift to range – you could be going 100, and shifting to range should put you into the correct range for that output speed.

Goes from first to second with the rpms jumping up between each gear shift. If i feather the accelerator it doesnt shift as hard. If i get on the throttle it messes up in most gears. Please tell me my transmission doesnt need to be replaced. You have a bad TCM.