Gear Ratios Options

[BonzaiCelica]

I was wondering what the purpose of the final drive gear ratio?

also what is this? http://auctions.nengun.com/item/k113042803

[slavie]

So were you ever able to rule out if C56 pinion would fit in the S5X gearbox? We know that the differentials are the same.

One could get the FSM for both and compare the shaft diameters for the two - they're listed in the FSM.

Swapping the gears is tedious but not too bad of a job once the gearbox is out and torn apart, just need a press mostly. I swapped the shorter 1-4 gears out of an S54 into my S51, but retained S51 5th gear and 3.9 final drive for highway cruising, and still have a disassembled 4.1 final drive bits. If somebody had a C-series box disassembled and wanted to compare, I'd be interested in trying to make that happen.

C60 though is unlikely though, as the shaft would be longer to accommodate the extra gear, and the cap would be in a different position. Unless you wanted to retain the C60 5-6 gear cover, but that's way too many variables...