Small Engines (Lawn Mowers, etc.): snapper hydro, core exchange, pressure valve

Question
yes sir i wrote you this last night and i just wanted to update you with the info you asked me for

snapper model 3B1451HBVE
TRANSMISSION
WASN'T FOR SURE WHAT NUMBER YOU WOULD NEED SO I WROTE ALL DOWN

205-043E0129A0552
6265-P1
PLEASE EMAIL ME WITH ANY INFO YOU HAVE ON HOW TO FIX THIS TRANSMISSION, ALSO CAN I OPEN THE CASE OF THE TRANSMISSION I HAVE HEARD IT WAS FACTORY SEALED AND COULD NOT BE OPENED, PLEASE ANY INFO WOULD REALLY BE HELPFUL!!

yesh sir, i have a snapper hydro the mower runs great but when l let off of the clutch the transmission has a whining sound if you drive it for a while the sound goes away a little but can still hear it, but as soon as you push the clutch the whining stops, what could this be?  

Answer
Hello Jamie:

 There are Several causes for this Noise. Low Oil or a Sticking Pressure Valve are Just a Couple of the Possibilities. Send me the Model Numbers Off the Mower and Off the Transaxle OEM Plate, Please. With these Numbers I can Locate a Breakdown/IPL and Better Assist you. Thanks.

 Respectfully

 John  

Answer
 Hello Jamie:

 Thank you for the Information. I Haven't had this Year or Model in the Shop for a Hydro Problem Yet and This is One of the Newer Factory Sealed Units.  The Information on the Internal components and Parts are Not Released by Snapper. I was Informed that Snapper Says to Replace the Hydro. Also the Old Hydro will be Required for a Core/Exchange. Sorry I couldn't be of more Assistance. Thanks.

 Respectfully

 John