Why is my Duramax not shifting out of 2nd gear?

Hey guy my name is john I have a 2001 2500hd duramax and it seems to me it’s not shifting out of either second or 3rd and the shift indicator lights work perfect but staying stuck in either 2 nd or 3rd gear any help would be so greatly appreciated 04LLYDMAX…. Did you ever figure out your problem?

Is there a problem shifting from 2nd to 3rd gear?

Have check engine, the computer says it needs the shift solenoid, the problem is it will not shift from 2nd to 3rd gear on an automatic transmission. Also found a vacuum line near to transmission disconnected but not sure where it goes.

Why is the Speedo not working on my Duramax?

Speedo isn’t working and the service Brake system light is on along with the parking brake indicator and the abs lamp. Still isn’t showing the gear indicator. What other speed sensors does this truck have?

What should I do if my Allison won’t shift?

There is another speed sensor at the back of the Allison– same part as the TC sensor.. might put the old one there and test drive it. Be sure you also check for damaged wires. If the display works OK when shifting gears, the NSBU switch may be OK.

What to do if your Allison Transmission goes into limp mode?

Unfortunately, a driver can’t reverse limp mode. If you find yourself stuck in third gear with this model of transmission, it’s probably time to have it rebuilt. Pro Tip: Keep your Allison transmission well-maintained to avoid accidentally triggering limp mode. This will also improve your vehicle’s overall functionality!

What kind of car won’t shift out of second gear?

If you own a Chrysler vehicle and it won’t shift out of second gear, read this post. If you own a Chrysler, Dodge, or Plymouth vehicle and discover that the transmission will shift from first to second gear but will not shift out of second gear, your vehicle has locked itself into “limp-in” mode.

Can a bad transmission shift solenoid cause hard shifting?

You may also have intermittent problems with the transmission shift solenoid, which will cause shifting problems. This can cause hard shifting or shiftings at too low or too high RPM, for example.

When does Chevy Silverado shift into 2nd gear?

-In Drive, 1st engaged, no sleeping, at full throttle engine hit the rev limit and transmission won’t shift, shifts only when let off the gas. Same thing in 4HI or 4LO. – When I hit the throttle hard until 4000 rpm and let off it shifts at about 2500 rpm.

Why does my car not shift into third gear?

Such a problem is automatic transmission won’t shift into 3rd gear. The transmission shifts into the first and then to second gear but does not move into the third gear. It seems that the gear slips into neutral when you push it to the third. Another instance could be the automatic transmission won’t shift into 3rd gear at all.

Why is the transmission not shifting on my Chevy Silverado?

Take a couple of easy steps to see why your truck is not shifting. No need to panic yet. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Your transmission is just supposed to shift and leave you alone.

Are there transmission problems in a 2002 Chevy?

The most recently reported issues are listed below. Original transmission went 19 months after purchase at 34k miles replaced 6/03 2nd transmission went at 57k truck miles/23k rebuilt transmission miles 6/04. 3rd transmission went at 114k truck miles/57k rebuilt transmission miles 1/4/07.

Do you have to shift automatic transmission manually?

I have to shift automatic transmission manually,,? fluid is good,we changed fluid and filter,still the same problem, My car has 285000 miles. My car has an automatic transmission. You may have a bad shift governor in the back of the transmission. The governor will shift the transmission as you speed up.

Why is my tow haul manual shift not working?

Do work! My tow haul and manual shift stopped working last winter. Turned out to be broken wires in the shifter at the joint in the steering column. If you don’t have steering wheel controls you turn the key to on and pump gas pedal 6 times. If you have steering wheel controls its in the dic.

Why is the gas pedal not working on my Duramax?

Turned out to be broken wires in the shifter at the joint in the steering column. If you don’t have steering wheel controls you turn the key to on and pump gas pedal 6 times. If you have steering wheel controls its in the dic.

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.

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.

Are there any problems with the LLY Duramax?

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

Why is my Duramax diesel engine not working?

The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.

Are there any issues with the Duramax pickup?

This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.

What happens to the head gasket on a Duramax?

Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. The Duramax has a multi-layer steel head gasket. When they have issues, they do not typically smoke out the exhaust or get coolant into the cylinders. What happens is the head lifts a little during the compression stroke.

What to do if Duramax shift range inhibited?

DURAMAX SHIFT RANGE INHIBITED FIXED!!! If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.

What to do if your Dodge truck doesn’t shift gears?

Pull the shifter down to man 1st gear & proceed to accelerate to aprox 15mph. Move the shifter to Man 2nd. Do you feel the transmission shift gears? If you are in doubt if it shifted or not, pull the shifter back down to Low.

What to do if your transmission does not shift?

If your Transmission does not shift, proceed to the next step after the transmission cools down. Hot ATF is no fun so be careful. Once the ATF has cooled down so that you don’t get burnt. Drop the transmission pan for a closer inspection of the problem.

Why does my Dodge truck not shift into overdrive?

Truck makes absolutely no effort to shift into over drive. Shifting is NOT erratic. Cruise control and speedometer STILL work. Is this a bad overdrive solenoid, tps sensor or something else!?!! :doh: :confused013: I also get “CODE 36”. Try pulling codes with an OBDII scan tool.

What kind of differential does a Duramax LB7 have?

At a stock power level, the stock Allison usually does an OK job at transferring the torque from the flywheel to the rear differential, but even a bone stock LB7 can put a hurting on the Allison, so you can only imagine what happens when you turn up the wick or hook up an oversized as many truck owners often do.

What are the most common problems with LLY Duramax trucks?

The most notorious problem found on LLY Duramax trucks is that they have a tendency to overheat. Part of this is attributed to their inadequate cooling system, that’s made up of the smallest radiator and fan ever found on a Duramax diesel truck.

Are there any problems with the GM Duramax?

In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use. Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic.

When to replace a Transmission Control Module ( TCM )?

Rather than relying on hydraulic or mechanical control over a transmission system, newer vehicles use a transmission control module instead. A car’s TCM will likely never need replacing, but if you have a bad transmission control module, immediate replacement (or repair) will be necessary.

What happens when your transmission control module is bad?

If your transmission control module is bad, you may still be in a high gear as you’re coming to a stop. When it’s time to start moving again, you’re in a too high a gear for proper acceleration which may even prevent you from moving at all. This usually presents itself as being either stuck in neutral or first gear.

Why does my transmission not shift to higher gear?

Because each gear has a maximum speed it can go to, you may never reach your intended speed if the faulty TCM refuses to shift to a higher gear. This is similar as above but in reverse order. Maybe you need to pass a slow moving vehicle and your transmission fails to shift into a lower gear when you mash the gas pedal to help you accelerate.

Why is the pressure switch stuck on my Duramax?

Code p0762 and p0757 indicate that the pressure switch on the related hydraulic circuit does not correspond to the commanded position of the related valve. This can be caused by bad wiring, a defective TCM, a sticking valve, a sticking or plugged solenoid or a bad pressure switch assembly.

What to do if your shift solenoid is stuck?

If any of these parts were swapped from the old trans to the new one then that part is doubly suspect. The first test I would do is to measure the resistance between the solenoid wires at the TCM and ground. If any are open then that says that either the wires are broken, a connector isn’t plugged in or the solenoid is bad.

How to repair a LB7 6.6 Duramax engine?

We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.

What kind of transmission does a Duramax diesel use?

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

What happens when a Duramax engine goes down?

Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

What to do about a Duramax 6.6 LB7 engine?

If you are having a problem with your 2001-2004 Duramax 6.6 LB7 diesel engine, please feel free to give us a call. We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.

Why is my Duramax not shifting out of 2nd gear?