4 speed 'problems'

[Sierra4x4]

my manual 4 speed tranny is acting really funny lately. Sometimes it doesnt want to go into second or third. like something is blocking it. it makes a little more 'rattle' than it ever did. could something just be comming loose inside? Should i check the gear grease inside before i get too worried about it? how does one check the grease anyhow, never done it but have been meaning to for a long while.

[Sierra4x4]

I hear the synchronizers are going bad, any other opinions?

[N8sToolz]

You may need a new slave cylynder for you clutch, my friend had teh same problem, maybe an adjustment thats all i can say, maybe change your the gear oil too, if theres alot of metal floating around then that would definately indicate somethins wrong. Good luck hope that helps some

[77bowtie]

NeverMind "grease" Check the oil SAE 80w-90, or GL-5 in cold climates. Your granny tranny has both fill & drain plugs, on the right side. Hope your not too late.....Jon