Q: I've just had a new clutch pedal fitted and now my gears 1st and 2nd want go into gear when the engine is cold.

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when the engine is warm all the gears work fine

My car has 100000 miles.
My car has a manual transmission.

Hi there. Try using 75/90 Synthetic transmission oil in the transmission. This may help the transmission for the shifting issue. This is a normal condition during a break in period, however, with 100,000 miles on the transmission the synchronizers could be worn out for the gears 1st and 2nd. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your transmission issue.

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