Tappet Noise, trans surging

Hi all



I drive a 1993 Rover Metro 1.4 Si auto. It's only got 15,500 on the clocks. I noticed that there's a few things going on with it though, despite the low miles.



- One of the tappets is quite noisy during cold starts. Had an oil/filter change with 10w/40 semi-synthetic last weekend, so no danger of low oil there.



- Transmission surges on cold starts every few days. Transmission fluid was changed last weekend as well. It does this mostly in reverse.



Any ideas about these quirks?



Thanks

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