Mick
I know I am coming late into this conversation, but some of the earlier posts mentioned a LT77 gearbox , but a year 2000 +8 will have an R380 as per your original post title . I trust the part number is for the later box.
Hi Andy
Yes you’re right, it is an R380 in mine and UKC9338 is supposedly for this box, but apparently the parts are interchangeable with the LT77, we shall see - watch this space!