I dont know if the 4000 and 5000 use the same tranny's, but my Haynes manual
for the Audi 80 1979-86 (Haynes #605) suggests these trannys:
014/1:    four cyl, four speed except UK GLE models
014/11:  four cyl, four speed, UK GLE models
013:       four cyl, five speed
093:       five cyl, five speed
089:       four cyl, three speed auto
087:       five cyl, three speed auto

I wouldnt know if these numbers will be of any help, I thought it could be
useful.

PerL
88 Syncro