I got your back Michael. This is info from my 1990 Amigo/Pup Service Manual:

Gera Ratios:

2.3 - 4ZD1 engine : 4.666 (7.64" ring gear - drum brakes rear)

2.6 - 4ZE1 engine : 4.3 or 4.555 (8.66" ring gear - disc brakes rear)

Steve G