First off I'm new to this site. I recently purchased an 04' Silverado 5.3 Z71 back in in November. It has 113,000 on it now. Just the other day I was driving and noticed rough shifting between 1st and 2nd. Shifting through the other gears is smooth. I checked the fluid level and it looks fine. I'm getting my filter and fluid changed tonight or tomorrow. Anything else that you guys might suggest?

 

my 95 did the same thing.. i got it flushed and it cleared it up in about 25 miles or so driving on it. make sure u get it FLUSHED not just changed.. flushed will get ALL of the fluid out not just what is in the pan..

 

Yeah, do the flush. I would also put a trans cooler on there (its a cheap insurance). Your's probably came with one stock, but I would put a better one on there. I have a stock and a B&M next to it as well. Oh, and put synthetic fluid.

 

Alright so a flush and not a change, because some people were saying I shouldnt flush it and that it would cause damage. Anyways I'm going to go ahead and do the flush then. Thanks alot.

 

well a flush just gets all of the old fluid out and it pumps all new fluid in at the same time.. if u do just a change all your doin is getting the fluid from the pan out..there is still fluid in the pumps n all of that in the trans

 

The flush only damages the trans if the shop doesn't know what they're doing or if you haven't been taking care of your trans and allowed build-up (which can come loose). I changed mine when I first got my Tahoe (at a little over 100k) and it's been fine since then (now at 170k).

 

also i want to add..they will ask if anything is wrong.. i told 1 place yeah it shifted hard they said they wouldnt touch it...i took it to goodyear and tld them nothign was wrong.. then changed it and it shifts good as can be.. its a 50/50 chance..i think i started a tread about changing tranny fluid..

 

Thanks for all the insight. Yeah i take it to a buddies of mine that has worked on my families vehicles for years. Should be fine. I'll have it flushed and then let you guys know the outcome.

 

sounds like a plan.. i had to drive mine about 25-50 miles mainly around town. and it smoothed it out pretty good.

 

got the flush done. runs smooth now. thanks guys.