Small Engines (Lawn Mowers, etc.): sabre1742, tuff torq, connecting link

Question
QUESTION: i have a john deere sabre 1742HS it runs ok on the level but it won't go up hills, i replaced the drive belt to no avail, there isn't anywhere to add oil it seems like it is a sealed unit, could this problem be the transaxel?

ANSWER: How old is the mower?  How many hours has the mower been used?

Let me know.
Eric

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QUESTION: i bought it in 2001, and it has about 320 to 380 hours

ANSWER: That's about average for it's age.  You are correct about your transmission, it is a sealed unit not intended to be serviced at most lawn equipment dealerships/shops.  If you look closely at the transmission you will find a manufacture and a model number.  If you can send me the transmission brand and model I can see if there are any service parts available.
Do you have the mower's owner's manual?  

Eric

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QUESTION: i belive it is a tuff torq k51, and yes i do have the oweners manual

Answer
Does the manual identify any adjustments on the pedel assembley or adjustments for the transmission connecting link?

I Googled your transmission and found this link:

http://www.ssbtractor.com/wwwboard/view_all.cgi?bd=lawn&msg=17780

Reading through the link you will find tips,tricks and other links for your transmission.

Let me know if the link helps.
Eric