Deere d105 transmission Q

[lineman]

Good day people, 1st timer here.
My two year old garden tractor started acting up, reverses the same as always but seems to have lost speed going forward, changed the drive belt, but no change. Only has 61 hours on it, hope it's not tranny trouble, anyone else have had this problem?

 

[Rivets]

First thing I would check is the drive belt idler pulley and tension arm. Make sure they are in good condition and moving freely.

 

[lineman]

. Thing that gets me, is it seems to have lost speed only in forward, not reverse.