What is the crunching noise when I shift into different gears?

I have a 2015 Hyundai Tucson with 50,000 miles on the clock. A few weeks ago I started having problems getting into fourth gear; it makes a horrible sounding crunching noise every time I shift into it. Today, I started getting the same issue but in sixth gear. All the other gears are fine. Any ideas of the problem? Thanks.

Asked on 22 July 2021 by Alex

Answered by Alan Ross
We'd suspect that the synchromesh has failed.
Similar questions
After 15 days of car ownership the car developed a fault. It is an automatic, the gearbox would not engage any gears, whether it be first or reserve. The dealership told us to find a garage to repair which...
My sister bought a 2012 Ford Mondeo 2.0 TDCi with an automatic gearbox for £5150, Less than two months later and 2000 miles covered, the gearbox has failed. It lost drive and the diagnosis was the gearbox...
I bought a 2013 Ford Focus from a main dealer in 2018. The car only had only 56,000 miles on it. It now has 67,000. The garage has told me that the wet clutch gearbox needs replacing. It is a sealed unit...
Related models
Cabin is spacious and comfortable. Lots of family appeal with affordable running costs and huge boot.