Mitsubishi Gearbox & Engine Repair Specialists in Midlands

Why does my Mitsubishi CVT shudder when I accelerate?

CVT shudder under acceleration is the most frequent complaint we receive from Mitsubishi owners with the INVECS-III automatic. It tends to present as a vibration or judder felt through the car body during light to moderate acceleration, often most noticeable between 20 and 50 mph. On the ASX and Eclipse Cross it is frequently first noticed when joining a dual carriageway or when accelerating out of a junction. The underlying cause is almost always one of three things: CVT fluid that has degraded and lost its grip properties between the belt and pulleys; belt wear reducing friction under load; or pulley surface damage caused by contaminated or low fluid. Unlike a conventional automatic fault, CVT shudder tends to deteriorate noticeably over a relatively short period. Early intervention keeps the repair cost significantly lower than waiting until the belt or pulleys require full replacement.

We diagnose and repair INVECS-III CVT shudder across the Midlands. A diagnostic starts from £30.

What does it mean if my Mitsubishi CVT warning light comes on?

A CVT warning light on a Mitsubishi means the transmission control module has detected a fault it cannot correct automatically. Common triggers include a belt slip event logged by the control module, a fluid temperature reading outside the normal operating range, a pulley position sensor fault, or a solenoid irregularity in the valve body. In some cases the transmission will enter a limp-home mode with reduced performance. Do not continue driving with an active CVT warning light. CVT units are sensitive to fluid condition and load. Running the INVECS-III with a logged fault, even briefly, can accelerate belt wear and cause pulley surface damage that turns a manageable repair into a full CVT rebuild or replacement.

We read Mitsubishi CVT fault codes with specialist diagnostic equipment and carry out the correct repair. A diagnostic starts from £30.

How much does a Mitsubishi CVT repair cost in the Midlands?

It depends on what the fault is. A CVT fluid flush and filter service is a different job from a full belt and pulley replacement or a complete CVT rebuild. Our prices run at up to 60% less than a Mitsubishi main dealer for the same standard of work using approved parts. Every job gets a fixed price before we start. The £30 diagnostic fee is taken off the repair bill when you proceed.

Ring 01922 666376 with your model, year and a description of what the CVT is doing and we can give you a cost indication before you book in.

Is a Mitsubishi CVT repairable or does it need replacing?

Most INVECS-III CVT faults are repairable. Full replacement is rarely the first or best option. Belt wear, pulley surface damage, valve body solenoid faults and fluid-related issues are all addressed through repair or targeted component replacement without swapping out the entire unit. The cases where full replacement becomes necessary are usually those where the belt has broken internally, where the pulleys have suffered severe surface damage from running with degraded fluid, or where the unit has been driven for an extended period with a known fault. We diagnose first, quote for the specific repair needed, and only recommend full replacement when repair is genuinely not viable. You will receive a clear explanation either way before any work begins.

Can I keep driving my Mitsubishi with a CVT fault?

In most cases, no. If the CVT warning is active, the transmission is slipping noticeably under load, the engine is revving freely without a proportional increase in road speed, or there is a whining or grinding noise from the transmission, driving further will make the fault worse. The INVECS-III is particularly sensitive to operating conditions when a belt or pulley fault is present. Belt slip events generate heat and debris that accelerates wear across the rest of the unit rapidly. If the car cannot be driven safely, vehicle recovery is available across the Midlands.

Will getting my Mitsubishi gearbox repaired independently affect my warranty?

No. Under Block Exemption legislation you have the legal right to use any qualified independent specialist without affecting your Mitsubishi manufacturer's warranty. Approved parts must be used and the technicians must be qualified. We satisfy both on every job. This applies whether your Mitsubishi is within its original factory warranty or covered by an extended plan. A Mitsubishi main dealer is not required to keep that cover intact, and on CVT work the cost difference with a specialist is typically substantial.

What are the most common CVT and automatic gearbox faults on Mitsubishi models?

On INVECS-III CVT models including the ASX, Eclipse Cross and Outlander petrol, CVT shudder under acceleration caused by belt wear or fluid degradation is the most common fault we diagnose. CVT slip under load, where engine revs climb without a corresponding rise in vehicle speed, is the second most frequent pattern and is usually a sign that belt grip has reduced beyond the point where a fluid service alone will resolve it. Fluid-related faults account for the majority of early-stage CVT failures across all Mitsubishi models; using the correct Mitsubishi-specified fluid at appropriate intervals prevents most of them. On the INVECS-II torque converter automatic in older Outlander and Shogun Sport variants, torque converter shudder and delayed engagement after cold starts follow the same pattern seen on other torque converter units of that generation. On the Shogun Aisin automatic, shift quality issues under towing or off-road loads are the most common complaint.