I've owned my 2000 EX since 2000 and have had to put 2 rebuilt transmissions in due to the clutches wearing out.
Honda put a car transmission in these Gen II vans and it didn't cut the mustard.
Either bin the van or put a rebuilt transmission is your only 2 options.

 

Welcome to the OdyClub!

I live in the UK and have a 2001 LX van with 160k on the clock.

Is your '01 the North American RL1 variant with V6 and sliding doors? Or the RA International Odyssey with conventional doors? Frequent drain and fill of the transmission fluid has been recommended for the 2nd Gen RL1. The '98 1st Gen was starting to show similar transmission issues, so drain and fill probably applies to your 2nd Gen as well, whether it has the 4 cylinder or V6.

 

Welcome to the OdyClub!
Is your '01 the North American RL1 variant with V6 and sliding doors? Or the RA International Odyssey with conventional doors? Frequent drain and fill of the transmission fluid has been recommended for the 2nd Gen RL1. The '98 1st Gen was starting to show similar transmission issues, so drain and fill probably applies to your 2nd Gen as well, whether it has the 4 cylinder or V6.

This is the most important part. WHICH Odyssey does the OP have in the UK?

 

Notorious transmissons from that era Odysseys.

 

Hi guys
Thanks for the responses.
The 2001 EX V6 has electric sliding doors.
It was manufactured in Canada and imported to the UK when the owner relocated.