Swapped the OEM fluid out for the apparently sacred BG synchro shift 2 today. So far the 2nd gear nibble still present but I’ll keep everyone updated this week. See what a cold start brings tomorrow !
Jack the car up drivers side and put on axle stand. The fill plug is upper drivers side and drain plug sticks out at the bottom. Allen keys for both - fill plug a bit tricky to get to. We used this, it holds a pint so have a sheet handy for filling up. Gets a little messy but works well. The plastic tube doesn’t go in far. You have to fill about six times. We measured what was in there and we put more or less the same back a smidge under (150ml) under three US quarts. Dropped the car a couple of times to level it off but none came out the fill plug so assume the casing is larger than the liquid. Used thisis it easy to change the gearbox oil? ie fill hole etc easy to get to? I take it you need some form of pump or big syringe and tube to fill it?