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Hi, I bought a 2017 kia sportage 1.7 diesel from a dealer 2 months ago and it has suddenly started grinding going into 4th gear only. If this is serious will it be covered by kias 7yr warranty and what are the possible causes.. Thanks for your help.
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Hi & welcome.
Moved to Sportage section & deleted duplicate thread for you (y)
 

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Would be interesting to see if a dealer approves this if you take it in.. of course your servicing will have to be in order or its I'm sorry its not our problem.. maybe it can be adjusted out from the gear change cables other than that I think its probably internal selector and syncro problems etc so with that in mind I thought lets see what a gearbox specialist would say so I took this off the tinternet for you..

Grinding and shifting trouble
The most common shifting complaint is grinding or "crunching" when shifting into gear, which is usually felt as much as it is heard.
The noise itself is caused by the ends of the synchronizer sleeve internal splines banging against the external dog teeth splines because the gear and sleeve are rotating at different speeds. This occurs as a direct result of something failing in the synchronization process. Inefficient synchronizer performance can be caused by either a problem in the transmission, or by a separate clutch issue.
While cone-like-synchronizers are simple and reliable, they rely on friction to function, and as such, the blocking rings degrade over time. They are also easily damaged by "speed shifting" without using the clutch that does not release completely, and imcompatible lubricants.
Synchronizer blocking rings wear badly when the clutch doesn't fully disengage because they are forced to act against higher speed differences than they were designed for.
The grinding will also dull the sharp end of the synchronizer sleeve splines and the gear dog teeth, and wear here contributes to bad synchroniser performance and hard shifting.
 

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Sportage 2017 (67) 1.7 crdi manual
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I had this exact issue on the same gear when I got mine. Luckily it was present when I bought the car so I was covered by consumer rights. The seller had the car looked at. It was the synchro on the 4th gear as I suspected. They noticed 6th was also on its way out too so they changed all 6 synchros, new clutch and flywheel was fitted too as they had to remove them anyway it makes sense to replace them at the same time. All in it cost the seller 拢2000 ish. 拢500 for the gearbox work and 拢1500 for the clutch and flywheel.
 

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Sportage 2017 (67) 1.7 crdi manual
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I'll just add. Not sure what the consumer laws are where you live. But in England, you are covered for 6 months whereby the seller has the burden of proof to state the problem wasn't there when you bought it. After that you would have to prove it was there. I was lucky and the problem was there from day 1 and got sorted within a week.
 
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