Mercruiser 4.3LX: identifying upper gear ratio

[mrwired]

I wiped the upper gears on my 1992 Regal Valentine 170 4.3 LX recently and am having trouble confirming serial numbers to order a replacement set.

Particulars:
number on transom - OD679481
number on upper unit - OD627548; 1.84R

I believe I need a 1.81 ratio OEM 43-75325A3

am I out to lunch?

 

[nola mike]

1.81 or 1.84 (your original is 1.84)