04 Winnie Brave 24 foot gasser bedroom slide issue.

a simple test will help. open the retract valve for that room. hit the switch, if it comes in at the regular speed, replace the solenoids. hwh normally recommends both because of people replacing the wrong one. if you are sure of the right one, order just one. both make sure the job is done the first time.
also look at the seals. if one is out of place, it could also restrict movement one way. more likely to hang up one one side though. theres more pressure to push the ram out. about half bringing it in.