Why does my durmax truck say range shift inhibited?

I am hoping someone will have an answer to what is going on with my 2004 GMC Sierra 2500 HD Durmax truck. When I go to shift into gear (reverse or drive) on the dash a message appears “Range Shift Inhibited,” and the truck does not engage into gear. I have to put it back into park and shift into gear again.

Why is my Allison Transmission inhibiting gear ranges?

In this issue of Keep Those Trannys Rolling, we’re going to look at one of the most common problems plaguing Allison’s LCT transmission group: inhibited gear ranges or shifts. These conditions are usually a result of the Transmission Control Module (TCM) receiving incorrect inputs from onboard sensors.

What does it mean when your transmission is inhibited?

When the TCM inhibits the transmission operation, you may notice the PRNDL display flashing on and off or display Gear Inhibited or Shift Inhibited. These conditions can cause the TCM to inhibit transmission operation. High engine RPM on engagement — Check engine RPM while shifting into gear.

How does a transfer case sensor inhibit transmission?

Transmission fluid pressure switch manifold — Provides the TCM with signals for monitoring clutch engagement and shift timing. Transfer case position sensor or switch — Provides the TCM with a signal to identify transfer case range. Now let’s discuss how each of these inputs can cause the TCM to inhibit transmission operation.

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.

Is there such thing as shift range inhibited?

I cannot find this particular issue on the threads, this is NOT “SHIFT RANGE INHIBITED” message but maybe someone here can tell me if related. Yesterday I pulled out of my driveway which exits onto a downhill. I was at Idle, and had inadvertently missed D and was instead in N.

Where to buy a range shift inhibed display truck?

You can get the part you want from international truck dealer they are a warehouse for allison. it is gear selector switch it will cost you around $55.00 You can’t post conmments that contain an email address. An expert that got 10 achievements. An expert that got 5 achievements. An expert that has over 10,000 points.

Are there shift inhibits on a Trans filter?

I gat the same problem after changing the trans filter….Dont know whats oing on 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).

Can a shift be inhibited by the output speed?

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. my dads truck is having this same problem, only it happens when in R under load.

Why is my shift inhibited neutral not working?

It could be that you didn’t see the expected turbine speed pull down, or that output speed was too high when range was selected.

Why is my Duramax range shift not working?

Came home and washed the truck. after checking the NSBU switch check the linkage. 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.

How many miles does a Chevy 3500 D-Max have?

I have a 2011 chevrolet 3500 d-max with 127000 miles on it. On nov 1st I parked my truck at my grand parents went in to visit for a few minutes. Went out to my truck started it and shifted it into drive.