remove the 2 front panel screws..then pull the bottom of the front panel to you and then grasp the sides of the panel tilting it our to about 35 degrees and the front panel comes off.
Reach down and push the motor toward the center of the washer from the left corner and then let go. It should slide / glide back to the original position. There are 4 neopreme gliders in the motor mount base. Usually one or more of them cracks / break over time and the end result is a slow spin.
This is the reair kit for the motor glides:
http://www.appliancepartspros.com/part_details.aspx?part_id=4023752&pn_=2-5000
You have to remove the motor pulley and then the motor to change these glides. (No Power to washer of course) You can leave the motor wires connected and just lay the motor on the inside washer base. The motor glide assy has to be separated from the motor to change the glides. Use the lubricant in the kits.on the motor mount and glides.
Note the break down of your washer base parts here:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=26850
There is more that we could check but... until you check the motor glides I will not elaborate. On older units this less than $10.00 parts kit most often corrects the problem. I would much rather go step by step because we can inflict outer problems by not following tedious repairs procedures for the spin drive components..
You should check / replace the belts on your washer. They are items 18 and 19 of this link:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=26850&diagram_id=28437654#d28437654
You can save on belts by ordering this set:
http://www.appliancepartspros.com/part_details.aspx?part_id=4011179
Not that to install the front panel you must tilt the bottom toward you about 30 degrees and latch the clips in the top panel then close and secure the front panel with the 2 screws.
I will watch for any responses.
Thanks for choosing FixYa,
Kelly