Welcome to iRV2.
The answer is probably .
Does the slide fit ok into the RV when closed?
BUT. In order to help you'll have to add year make and model info to you post.
Different manufacturers use different slide mechanisms and the methods are different.
I'll assume you've checked the RV floor for level, and compared that to the slide floor or bed frame.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.