Yanmar 2500 gear issues

[Paul Lord]

My 2500 seems to have lost its go in all "high" gears. When in "LOW" everything works fine but when I put her back in high it seems like it doesn't have no get up and go? Now, this only started after i did a little light bush hogging in high gear before I got to the heavy brush and then to low gear. Any input here?
Thanks in advance.
Paul

 

[TnAndy]

Hydrostatic transmission ? Check you linkage from the shift lever all the way thru.....sounds like you have something that is loose or fell out on the upper range.

 

[Paul Lord]

Now when I first start her up after she's been sitting it will take off in "high", but minutes later I loose the umph. She acts like she want to roll and the engine revs but little movement? Then I end up putting her back down in low and get her back up to the house. Now, I'm not tractor savvy and appreciate anyone or everyone's patients. Thanks again