OL'Homey, this is straight from the warnings that came with the gear drive... Oh this is the unit that I bought off of ebay a couple of weeks ago "brand new in box" and as far as the sprocket listings I have for the C-Series saws, they only listed 2 different gear driven versions (one for 1/2" pitch and one for .404" pitch)
A-58544 Planetary Drive Assembly
This Planetary Drive Unit is equipped with a .404" pitch sprocket. Use .404" pitch chain only.
Then it goes on to explain that it isn't shipped with oil and you must fill it up before use.
Then another warning states to not run the saw with the Direct Drive sprocket removed unless the gear drive is installed due to possible clutch shoe shatter and personal harm from the shattering...
Then it's got another warning about keeping the cooling fins cleaned out, so as you don't overheat the unit...
I counted the revolutions and have come to the conclusion of this being either a 2.80 : 1 reduction or a 2.90 : 1 reduction (counting was the only way I could get this info because it doesn't seem to be listed anywhere), but it does have the 8 tooth sprocket gear for the .404" pitch chain, which will speed the chain back up slightly over the 7 tooth sprockets that I use for direct drive (I have some 8 tooth sprockets for direct drive, but I believe that they are for 3/8" pitch chain - the rarer sprocket found on the C-Series saws, but then again, they may be for the .404" pitch chain)... It says that the 7 tooth sprockets on the gear drives were for 1/2" pitch chain, so I guess it stepped the speed up a little "sprocket wise", so the chain wouldn't turn too slow
As far as the bar goes, I will have to get back with you some time tomorrow (it is currently 12:30AM here) and that's even if I can get a serial or part number off of it...
I'm going to get some nice Mobil 1 75-90 syn gear oil to put in her tomorrow and run it on the C9 with 36" bar to see how she does, so I'll try to post some comments when I get back with you on the Poulan Bar number
Greg