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Hi there,
I recently (< 2 months ago) purchased a car from a dealership. Within 1 month it was grinding during 2nd to 3rd gear changes >2500rpm.
Took it back and they replaced the transmission fluid. This made it better but has not solved the problem and the grinding is still present >3000rpm. It is possibly even worse after the car has been driven for a prolonged period.

I took it back again and was today was advised the mechanic is unable to do anything about it and they want me to pick it up. They attempted to reassure me that it will not have any long term effect on the car and that it is fine to drive. This seems unlikely to me as it's a pretty nasty sound and some amateur googleing has me wondering if it's not a synchro issue which does sound cheap or easy to fix. I've asked for a written copy of what the mechanic has inspected as I don't feel there has been any real attempt to solve the issue.

Would like to get your thoughts on what I do next. Is it acceptable I have it looked at by an independent mechanic and if there is a fault they pay for it?
Or do I tell them this is an unacceptable result and ask them to investigate further? Or lastly, do I take them at face value and take it back as is. My concern being that it is a problematic noise and/or that one day I'll need to sell the car and this will be hard to explain.
Any thoughts would be appreciated.
Kind regards,
A

Hi if it is a manual car it sounds like worn syncros. You could say under the CGA it would not be considered of acceptable quality or durability.
You should offer them the first right of repair if they refuse or fail to repair the car you can dispute the issue at the motor vehicle disputed tribunal. Be sure to get evidence that shows they don't want to fix it and perhaps take it to a gearbox shop for a independent assessment.

Hi Ian, That's super helpful. Thanks very much for your reply :)