I put the diff into the axle casing this evening.

It took me a while to figure out which was the correct way around. It was a tight fit and involved use of the rubber deadblow hammer and swearing. I was about to give up, but then I tried turning the prop connection back and forth and it suddenly dropped in.

I was advised by a friend to use about a 2mm strip of gasket sealant (Black RTV). I used Granville but I understand Caterham use the Wynn brand for their factory builds.

PeterM mentioned that a dry run could cause problem. He was right; it is a good idea to get a rough idea and line it up, but if you slotted it in place, getting it apart again might cause stress.

I also attached the breather spigot. It seemed rather loose. I cut two slots about a 2mm apart on either side of the spigot and bent them into the groove with a hammer and nail. This seems to let the spigot move freely but prevents it falling off.

*NB I am not an expert - read my later blogs to see if I cocked it up.