[rebel715]

I have the 3 blade 38" deck on my 1977 Cub Cadet 1000. It does not cut very well, as the outer blades do not seem to cut the grass too well. Mule drive belt is tight, all spindles are lubricated, good secondary belt for the 2 smaller blades, blades are sharp, and idler pulley is lubricated and working properly. It seems as if the secondary belt is slipping, but it seems to have adequate tension on the pulley. I am also mowing in 1st gear with full throttle. I do NOT have a creeper gear, but wish I did. Any thoughts??