I am having gearbox problems in my 2019 Isuzu D-Max
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Asked by Michael
There is noise from the gearbox in my 2019 Isuzu D-Max, and the rear gearbox seal keeps breaking and leaking all the time.
Answered by CarsGuide
17 Jan 2024Problems like these are hard to diagnose remotely, as there's a lot going on in a modern gearbox. But, conventional wisdom suggests that a noise followed by a series of failures of the same component (the oil seal) means something inside is bent or damaged.
The noise is potentially being caused by something misaligned and rubbing or a damaged bearing, and the blown oil seal is the eventual result of the damage/swarf/heat/friction that results. The other possibility is that the rear gearbox seal is being destroyed from the other end of things, as in the tailshaft. A bent tailshaft could set up harmonics, friction or vibrations that could kill the seal, but you'd imagine there'd be a vibration through the whole vehicle at speed if this was the case.
Your vehicle is under warranty (six years of it from new) so make sure the dealer is aware of the problem and their obligation to fix it.
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