Tranny shift problem

[monsterjam5000]

When I get on the sway and drive for say ten miles then get off and try some city driving my car shifts funny. It will get up to 3000 Rpms then slip some up to 3500 rpms then shift to second and it's a hard shift. What ahold I do it only happens after eway driving. I was think flush fill with new filter and gasket but have heard bad things about doing that people told me it will stir up drit in trans and cause problems Let me know thanks

[gtpinsc]

trans flushes done right will not hurt the car... i had mine flushed/filter/fluids... noticed a big difference.. just go to a respectable shop to have it done... have it scanned for codes first.

[monsterjam5000]

Also I raced a couple times last night and it would not sift out of first until six grand it would hit five grand fast then slowly go to six grand then shift. Well that slowly go to six grand part is slowing me down is this normal. What brand and kind of trans fluid do I use thanks

[gtpinsc]

i use dex 6

[monsterjam5000]

Brand and can't I get full synthic to mix with the regular that's already in there. Also the I was told dexron lv not dexron vl Are your sure it takes vl in a 1998 trans

[gtpinsc]

Dexron VI (6)?????? - GM Inside News Forum
if ur gettin it flushed, it wont be mixing... my car was shifting funny... no hard shifts.. kind of long drawn out shifts... my problem is cured now.

[monsterjam5000]

Y I didn't mean flush I was talking about a filter change and that only drains out about 5 quarts so it will be 5 quarts new and the rest old. So will it be ok to put in 5 quarts of new trans fluid

[gtpinsc]

[QUOTE=monsterjam5000;362316 I was think flush fill with new filter and gasket but have heard bad things about doing that people told me it will stir up drit in trans and cause problems Let me know thanks[/QUOTE]

mmmk... so what are u gonna do, flush it or fluid filter change... exactly how dirt is gonna get in trans im confused.

[monsterjam5000]

Fluid filter changed. Not sure on how dirt gets in trans that's just what I was told maybe they mean metal that magnet did not get. I just want to do a fluid filter change and use full synthetic