I got a few jobs done around the car over the holidays, including replacement of the reverse switch which has been playing up, first intermitent and then completely stopped working and I was getting fed up of not seeing anything when reversing in the dark and reverse sensors not coming on. I put the multimeter on the old one which showed that the ball needs to be pushed in completely to register a short circuit and there was some resistance if not pushed in fully, so maybe getting worn out. The new one gave a short circuit even when not fully pushed in.
Euro Car Parts had three different ones come up on the search using my reg no but they narrowed it down to one in the shop so I took that one. You can see from the photo that the new one on the left has a shorter body and longer threded section so I was a bit unsure of fitting it.
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The longer thread means that it fouls in the gearbox when selecting reverse gear and stops it going in. The solution was to unscrew a few turns until the gear can be selected without resistance on the gear stick which at frst I was unsure about in case it starts unthreading itself or does not seal properly and could start to leak. There is an o ring which I think is pushed into the threaded section to seal it, and it needed a wrench to turn it (wouldn't turn by hand) so tried that it so far there is no oil leaking from the gearbox or anything.
Anyone else come up against this, and if so did you do the same? My only other complaint is the lack of working space between the top of the gearbox and the underside of the battery compartment - my sockets were too short and an adjustable wrench handle was too long to allow it to turn so i ended up botching it a bit. Hopefully it will hold long enough to not give me any problems.