Husqvarna 24hp VTwin Hydrostatic 48' cut riding lawn mower will not move either direction.

The locking is automatic:

Husqvarna riding lawn mowers, lawn tractors, garden tractors

www.husqvarna.com/us/products/riding-lawn-mowers/

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Husqvarna Riding Lawn Mowers YT48XLS CARB

www.husqvarna.com/us/products/.../960430205/

Husqvarna GroupBy using this site, you agree to our use of cookies. Learn more. Got it. Close .... Wedeveloped our LS series yard tractors with the discriminating landowner in mind. Engineered for added ... Automatic locking rear differential increases traction while cutting wet grass or on slopes. ..... WORKING FAST WHILE STAYING SAFE.

Husqvarna Riding Lawn Mowers GT54LS

If mower has been put up for winter and old gas left in gas tank it will drain to carburetor and the float will stick. This will let the gas flow out the float bowl. Remove float bowl and use carburetor cleaner to clean the valves and move the float up and down when it you get it clean the gas should flow float down and turn off when pushed up.
B. J.

first i would check the belt tension also check the belt for oil is so look for the cause of the leak the repair the leak and replace the belt

Go to john deer dealer they should be able to print u of that diagram for you.

check the connecting rod to the tranny. follow the gear handle and you should find a rod connecting the handle to the axle make sure you're in neutral and adjust the rod until the handle starts to move

Find the solenoid and on the side the battery cable is hooked to is another smaller red wire that has the inline fuse on it. It will be a 20 amp or 30 amp fuse. Hope this helps Tim

This should be the exact operator's manual for your tractor. Let me know if it's not.
http://www.managemylife.com/mmh/owner_manuals/14333/HUSQVARNA-Lawn-Tractor-L1001328?brand_name_search=Husqvarna+28957

It will show you the belt routing for your deck and the belt routing for your transmission. Please read the section on replacing the belts.
You can print out a copy for your files.
I'll be glad to explain more. Just let me know.

first sign of a failing hydrostatic transmission

You need model number and serial number. Look at www.searspartsdirect.com. Once you locate your parts list for your model, look on right side of web page and see if there is a link to a manual for this model. If so it should have a diagram.

yes there should be,its ether near starter solinoid or near battery