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    I have issues with the gearbox in my 2011 Triton 4X4 manual diesel. I can change up through gears first to fifth but can't go from fourth to third.

    Mitsubishi Mitsubishi Advice Mitsubishi Triton Mitsubishi Triton Advice Mitsubishi Triton 2011

    I have issues with the gearbox in my 2011 Triton 4X4 manual diesel. I can change up through gears first to fifth but can’t go from fourth to third, it just won’t go in. I can go from fourth into second quickly keeping the clutch in, and then into third. Any ideas?

    Answered by CarsGuide
    14 June 2022
    David Morley

    This sounds like a classic case of worn synchromesh rings inside the gearbox. These rings are designed to make smooth, easy shifts between gears but as they wear (or even break) they lose that ability and the gears become difficult to change. It’s also common for this problem to be worse on downshifts compared with upshifts which is why you can shift all the way up to fifth, but have trouble coming back down through the gears.

    My money is on third-gear synchromesh being your problem. By shifting from fourth back to second and then third, you’re effectively `borrowing’ the second-gear synchromesh to soften the shift into third.

    Unfortunately, the fix is a gearbox rebuild. But before that, it would be worth changing the oil in the gearbox and checking out a gearbox additive that helps with shifting feel and smoothness. If that makes a difference, great, but you may still ultimately be looking at a new or rebuilt transmission.

    The other thing to know is whether the gearbox is reluctant to select reverse gear with the engine running. If it is, you might instead be dealing with a worn clutch which is much cheaper to replace.

    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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