Yes, the overdrive A833 was 3.09 also... the first gear ratios available in A833s with 23-spline input shaft are:
2.66 (pre-1970 V8s)
3.09 (all 6-cyl boxes plus overdrives)
2.47 (1970-on V8)
There's a complete listing of A833 ratios and gear tooth counts in a thread
here It also has some other New Process box ratios listed... very handy...
