Quick dumb FDR 60e question

[95naSTA]

I know for a 3.43 FDR I need a 3.06 diff and a 33/37 chain and gear set.

Does that mean 33 in the input and 37 on the output?

Go easy on me, my brain is not working today...

[sharkey]

you calculate ratios driven/drive. 37 must be the driven, 33 must be the drive to get that ratio.