Cat D3, Deere 110 TLB, Kubota BX23 and L3800 and RTV900 with restored 1948 Deere M, 1949 Farmall Cub, 1953 Ford Jubliee and 1957 Ford 740 Row Crop, Craftsman Mower, Deere 350C Dozer 50 assorted vehicles from 1905 to 2006
Fluid sufficient and screen clean if Hydro?
Also... is the Hydro Selector in Low Range...
Some have had problems because the Hydro was in High and the tractor basically would not move on inclines.
are your tires fluid filled? i would mark your tires and rim and drive around a bit. i bet its slipping at the rim. if rim seems ok,, did you check the hst fluid level cold?