6 speed in 2.5

[911monty]

Originally Posted by truegearhead

I’ve already choked down on the diameter for this reason but am thinking about going to 16” wheels. How about this option, looking at the ratios a 2.7 transmission with a 2.5’s final drive would give me a 6% lower gear in 4th and 5th. Anyone know of a 2.5 final drove can be installed in a 2.7 transmission?

Since ring and pinion have to be matched I'd think you'd have to tear down the trans to change the pinion. Even though both trans use a 9 tooth pinion gear the pitch difference would change from a 32 tooth to a 35 tooth ring gear.
Why not just install the 2.5 trans? You get the better gearing and can easily go back.