Find yourself a safe clear space going downhill, then switch off the engine and freewheel down. See if it stops. Take care if you have power steering of course.

Have you got an overdrive , loose washer on gearstick can rattle like that on mine

Gear stick in the correct place,your steering wheel is in the wrong place But it is the correct gear stick for a 2A Off for a part search

may help

Yep useful thank you. It was a loose earth wire. I’ve attached it to the auxiliary control panel screw and working just fine now!

Two other thoughts. Did you change the release bearing when changing the clutch? And what condition are your engine and gearbox mountings in?

Re anneal the copper washers, easy and quick.

Disco washer NO. Same washer used in 2ltr 2.25 and 2.5 engines up to 1990.

Have you got a low level fuel warning light and the two wires to connect to a sender with the two terminals if so best option buy a new sender then all works as it should

Black wil be earth Have you read these https://www.landyzone.co.uk/search/7211712/?q=Hazard+wiring&t=post&c%5Bchild_nodes%5D=1&c%5Bnodes%5D%5B0%5D=6&o=relevance

You need the steel washer and the copper crush washer Do you know where the leak is coming from