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Isuzu MU-X Gearbox & Transmission Problems

Are you having problems with the transmission of your Isuzu MU-X? Let our team of motoring experts keep you up to date with all of the latest Isuzu MU-X transmission issues & faults. We have answered all of the most frequently asked questions relating to problems with the Isuzu MU-X transmission.

Having trouble shifting in my 2022 Isuzu MU-X

This needs to be sorted out quickly as a car that you can't be sure is in Park is always a potential to roll away on its own causing who knows what grief and damage. It sounds like there's something amiss with the way the gear selector is talking to the actual transmission, and any resistance in the action of the shifter really shouldn't be there. That said, you do need to have your foot on the brake to select a gear from Park, so maybe you're taking your foot off the brake pedal prematurely.

You're possibly correct that the two issues are related as a car that thinks it's not in Park, will probably not want to allow you to use the walk-away locking mode. But here's the good news: This is absolutely a warranty issue and Isuzu needs to fix it at its cost.

Book the car in to be inspected as soon as possible and, in the meantime, make sure it's parked somewhere from which it can't roll away. Physically chocking a wheel (with a house-brick, a rock or whatever) isn't a bad idea till it's fixed, either.

Transmission slipping in my 2015 Isuzu MU-X

This sounds like a case of low transmission fluid. Check the transmission dipstick according to the instructions in the owner's manual to see if the level is where it should be. Low fluid level can cause all sort of problems from slipping to a lack of drive to uneven shifts and shifts occurring when they shouldn't. Also, try to find out what fluid was put in the transmission when it was last serviced. The wrong type or grade of fluid can cause the same types of problems as not enough fluid.

If the fluid checks out, then you need to start looking at other causes such as glitches in the on-board computer that controls the driveline. An electronic scan of the vehicle would be the next step.

My 2021 Isuzu MU-X automatic keeps changing gears at strange times

It sounds very much like the transmission is confused electronically or has a problem with its valve body which is supposed – in conjunction with the computer – to make decisions about what gear the transmission should be in. Perhaps it's as simple as a dodgy electrical connection somewhere and the impact of potholes or buffeting from passing trucks is causing a short-circuit somewhere.

The first piece of advice, however, is to not drive the vehicle any farther. You not only risk damaging the transmission, but it's also dangerous to drive a vehicle that might suddenly select the wrong gear at random. The second piece of advice would be to take the vehicle to a dealership and have its computer scanned to see if any fault codes have been recorded. If your local dealer doesn't want to know, take it straight to head office and contact Isuzu's customer service division.

The good news is that your vehicle is still under the factory warranty, so make it Isuzu's problem, not yours. Just make sure that the behaviour has been logged as a problem, at which point it's classed as a pre-existing condition and Isuzu is still obliged to fix it even if the warranty runs out.

What does the "check system" error code mean in the Isuzu M-UX?

Any time you have a fuse blowing consistently, you have an electrical problem. Either the circuit involved in lighting the indicator letters and shifting the vehicle into Park (modern transmissions use electronic actuators extensively) is shorting out or being overloaded, and that’s causing the fuse to blow as an alternative to the wiring melting and setting fire to something.

If it’s a new vehicle, though, it’s covered under the factory warranty, so a trip to the dealership should put it right at no cost to you. It could be a pinched wire, a poor earth, or a fault in the electronic control system. Either way, it’s Isuzu’s problem.

Isuzu MU-X 2016: Problems after servicing

Any odd or new noises from an automatic transmission are, indeed, bad noises Gavin. Squealing or screeching from the gearbox can be caused by any number of things, but none of them are good and none of them are likely to go away on their own.

To be honest, I’ve heard of more problems with the Isuzu’s manual gearbox, with the fifth-gear synchro dragging and making a dry-bearing noise. The first thing I’d do is interrogate the car’s on-board computer to see if any fault codes show up and take it from there.

Isuzu MUX LSU 4x4 2018: Does it need an extra a transmission oil cooler?

It’s good insurance, particularly if you are going to be towing, as you plan to do.

 

Isuzu MU-X 2016: Transmission shudder and noise

It's not something that we have come across before, and it doesn't seem right, but it needs further investigation to find out if it is a normal function of the car or a fault. I suspect the latter, but couldn't say one way or the other without witnessing it do it. Take it up with your dealer again, and if he says it is normal with the MU-X ask him to demonstrate it on another car. If he can't reproduce it on another one press him and Isuzu to investigate why it's happening on your car. If he can show you that it does happen on others you have to believe that it is an in-built fault with the MU-X.

Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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