3 Common Mitsubishi Diamante Transmission Issues & Cost!

Last Updated on September 25, 2023 by Robert Wilson

The Mitsubishi Diamante is a mid-size sedan that was produced by Mitsubishi Motors from 1990 to 2005. The Diamante was originally intended to compete with the Toyota Crown and Nissan Cedric/Gloria/Cima in the Japanese market, but it was also exported to other markets including North America, Europe, Australia, and New Zealand. In Japan, the Diamante was succeeded by the Galant Fortis (now called the Eclipse Cross) in 2007.

One of the most common problems with the Mitsubishi Diamante is transmission failure. This can be caused by a number of different things including poor maintenance, incorrect fluid levels, or a faulty shift solenoid. Transmission failure can be expensive to repair and may require you to replace the entire transmission.

If you are experiencing any problems with your Diamante’s transmission, it is important to take it to a qualified mechanic for diagnosis and repair.

If you’re having Mitsubishi Diamante transmission problems, you’re not alone. Many drivers have reported experiencing issues with their transmissions, and the problem seems to be especially prevalent in older models. There are a few different symptoms that can indicate you’re having transmission trouble.

If your car is hesitating when you try to accelerate, or if it’s taking longer than usual to shift gears, those could both be signs of a problem. You might also notice that your car is making strange grinding or whining noises when you’re driving. If you think you might be having transmission trouble, the best thing to do is to take your car to a mechanic and have them take a look.

Trying to diagnose and fix the problem yourself is likely to be difficult and expensive, so it’s best to leave it to the professionals.

Mitsubishi Diamante Transmission Problems

Credit: en.wikipedia.org

What are the Most Common Transmission Problems With Mitsubishi Diamante

There are a few different transmission problems that can occur with the Mitsubishi Diamante. One of the most common is when the transmission slips out of gear. This can happen when the clutch wears down and is not able to engage properly.

Another common problem is when the gears grind or hesitate when shifting. This can be caused by a variety of things, such as low fluid levels, dirty fluid, or worn-out clutch plates. In some cases, it may be necessary to have the entire transmission rebuilt or replaced.

What are Some Things That Can Be Done to Prevent Transmission Problems

There are a few things that can be done to prevent transmission problems. First, make sure the fluid level is checked regularly and topped off as needed. Second, have the transmission serviced every 30,000 miles or so.

This includes a flush and filter change. Third, avoid hard starts and stops when possible. Fourth, use the recommended grade of motor oil for your vehicle.

Fifth, if towing, use an auxiliary cooler to help keep the transmission from overheating. These are just a few things that can be done to help prevent transmission problems. If you have any further questions or concerns, please feel free to contact us and we would be happy to assist you further.

How Do You Know If Your Diamante is Experiencing a Transmission Problem

If your Diamante is experiencing a transmission problem, there are a few things you can look for to be sure. First, check the transmission fluid level and quality. If it is low or dirty, it could be causing problems.

Next, listen to the car while it is running. If you hear any strange noises coming from the transmission area, there could be an issue. Finally, feel the car as you are driving it.

If it seems to be slipping gears or having trouble shifting, there may be a problem with the transmission. If you notice any of these issues, take your car to a mechanic to have it checked out as soon as possible.

How Can You Tell If the Problem is With the Transmission Or Another Part of the Car

If you think you may have a problem with your car’s transmission, there are a few ways to tell. First, check the transmission fluid level and condition. If it is low or dirty, this could be a sign of a problem.

Next, listen for any strange noises coming from the transmission area when the car is running. Grinding, whining, or humming sounds could indicate trouble. Finally, feel for any unusual vibrations coming from the car when it is in gear.

If the problem is with the transmission, these symptoms will likely get worse over time as the damage progresses.

What Should Be Done If a Transmission Problem is Suspected

If you think you have a transmission problem, the best thing to do is to take your car to a certified mechanic or transmission specialist. They will be able to diagnose the problem and recommend the best course of action. In some cases, the problem may be able to be fixed with a simple repair.

However, in other cases, it may be necessary to replace the entire transmission.


Mitsubishi Diamante 2002 Problems

If you’re the owner of a Mitsubishi Diamante 2002, then you may be familiar with some of the common problems that can occur. Here is a list of some of the most frequently reported issues: 1. Engine stalling – This problem is often caused by a faulty oxygen sensor or mass airflow sensor.

2. Transmission slipping – This can be caused by a variety of issues, including low transmission fluid levels or a failing torque converter. 3. Brake problems – Common issues include worn brake pads or rotors, leaking brake lines, or a failed master cylinder. 4. Suspension noise – This is often caused by worn suspension components such as shocks or struts.

Mitsubishi Diamante Problems

The Mitsubishi Diamante is a popular vehicle, but it’s not without its problems. Some common issues include transmission problems, engine overheating, and electrical issues. Transmission problems are the most common issue with the Diamante.

Many owners have reported that their transmission slips or hesitates when shifting gears. This can be a major problem, as it can lead to engine damage or even a complete failure of the transmission. If you’re experiencing this problem, it’s important to take your car to a qualified mechanic as soon as possible.

Engine overheating is another common issue with the Diamante. This can be caused by a variety of things, including a faulty radiator or thermostat, low coolant levels, or a clogged cooling system. If your car starts to overheat frequently, it’s important to have it checked out by a mechanic so that the problem can be diagnosed and fixed before it causes any serious damage.

Electrical issues are also fairly common in the Diamante. Many owners have reported problems with their power windows, door locks, stereo system, or navigation system. These sorts of problems can usually be resolved by taking your car to an authorized dealer or service center for repairs.

Mitsubishi Diamante Reliability

Mitsubishi Diamante is a very reliable car. I have owned one for about 3 years now and have never had any major problems with it. It has always started up without any issues and has been very fuel efficient.

Overall, I would say that the Mitsubishi Diamante is a great choice for anyone looking for a reliable and affordable vehicle.

Mitsubishi Diamante for Sale

If you’re in the market for a used Mitsubishi Diamante, there are a few things you should keep in mind. First, the Diamante is a luxurious car, so you can expect to pay more for one than you would for a regular sedan. Second, because it’s a luxury car, it may have been driven more carefully and thus have fewer miles on it.

Finally, check the car’s history to make sure it doesn’t have any major problems that could cause headaches down the road. Assuming all of that is in order, what can you expect from a used Diamante? The Diamante was Mitsubishi’s flagship sedan from 1990 to 2005, so it’s packed with features and amenities that were ahead of its time.

It has a spacious interior with plenty of legroom and headroom for passengers, as well as a large trunk. It’s also known for being very reliable and comes with Mitsubishi’s excellent warranty coverage. So if you’re looking for a used car that offers luxury and reliability at a reasonable price, take a look at the Mitsubishi Diamante.

You won’t be disappointed!


Mitsubishi Diamante transmission problems are common, especially with the older models. The most common issue is the “hard shift” from first to second gear. This can be caused by a variety of things, but the most likely culprit is a worn-out clutch or pressure plate.

Other issues include delayed engagement (when the transmission doesn’t engage immediately after shifting into gear), and “slipping” (when the transmission fails to hold onto a higher gear and slips back into lower gears). These problems can often be fixed by simply replacing the affected parts, but in some cases, a complete rebuild may be necessary.


  • Robert Wilson

    Introducing Robert Wilson, your go-to source for automotive technical solutions. With 5 years of industry experience and a mechanical engineering background, Robert's expertise was honed at the heart of Ford Motors in Michigan back in 2010. Join him on this blog as he shares his knowledge and practical fixes to keep your vehicles running at their best.

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