do any one know why my something grind when shifting gear. sound like clutch grinding not sure.

 

you clutch shouldnt "grind"

does your clutch slip?
does this only happen at high rpms?
try double clutching, does it still grind?

 

something grind when i pop into second gear and this is at about 2500-3000 rpm. sound like 3 to 4 clunking noise.

 

try to change the transmission oil to GM synchromesh (friction modified)..it helps..my gear was grinding too.

 

ne one recommend wat kind of oil for tranny?

 

Only two things cause this situation. Your clutch is not disengaging properly, or you have worn syncros in the tranny.

 

how bad is worn syncros?

 

worn syncro means between gear changes it'll be rougher, you cna hear the gears rubbing against each other and it'll make this small grinding noise,

basically you'll need to get new syncro for the tranny, but not for all the gears, just for the gears that are grinding.

sounds like you have a screwed syncro, did you happen to mis shisft at high reve or anything like that and grind the gears a bit? if so, then you most likely screwed up your syncro, it's a common problem on f and h series engines.

 

i don't recall grinding at high rev but it only grind from first to second and today it start grinding from 2-3. and will it mess up my tranny if id on't fix the syncro soon? Is there another name for syncro?

 

ne one?

 

Whens the last time you flushed your transmission fluid? If its been a while you might want to go ahead and try that and use some of the GN syncromesh

 

also you might have a dying clutch master cylinder

 

tranny oil was just change and master cylinder change about last year

 

penzoil makes a synchromesh tranny oil as well and cheaper than the GM one. its good stuff.

 

do you grind when you double clutch?

 

no grinding when double clutching. just grind when i move from first to second at regular shifting.

 

what I mean is, before it started grinding from first to second, did you mis-shift oneday and grind the gears? or like dind't put it into gear right etc?

but yea from what it sounds like changing the tranny oil won't help, it sounds like you're syncro is gone, coz syncros help to smoothen out every gear change hence no metal grinding, just smooth sliding gear change, and so now since that you are grinding between first and second, most likely the syncro has just ended it's life.

 

how do i change my syncro?
or wat is another name for it. can't find it at parts website

 

ok youve got a bad synchro... i have no idea as far as rebuilding a tranny... you could find another one, or have someone rebuild it for you.