I had exactly the same problem with my 04 I went and got some Lucas transmission repair in a bottle. And it almost instantly went away. I've added another bottle of it in the last two years and I've never had it slip again or shift funny. Yes this doesn't fix the problem but I've got 2 years out of it
The 2004 trailblazers came with the worst transmission Chevy makes...I can never remember the entire label for them but it's the 40 instead of the 70 they commonly used in the 96-99 silverados...it's known for going bad with the actual shift gear components but also the shift solenoids have a tendency to stop working as well...there are videos on YouTube that are very informative..one even shows the guy tearing one down for a complete rebuild..the solenoids are also a pain to figure out if u aren't familiar with rebuilding or repairing these types of transmissions...the first thing I would do in your situation is get a new gasket and filter for the trans and put fresh trans fluid in it..DO NOT FLUSH THE FLUID! Just let it drain when u take the pan off..clean out the pan and make sure there's no big chunks in it..if u find chunks..it's on its way out..if not, clean off any excess debris around the lip of the pan as well as the gasket area transmission side..use a rag..never scrape with a metal anything..they have aluminum housing and can easily be damaged..if any build up or gunk is on the area the gasket goes...use very fine sand paper and water to smooth it out...when u place the gasket and pan in place..use a star pattern on the bolts using your hands to get them started then tighten them down to where u barely have to put pressure on wrenching them..if u see the gasket starting to bulge out at all, it's too tight at this point..back it off some till it's not bulging out..tighten in an X pattern respectively until theyre all tight..if u have a torque wrench that shows lower ft lbs or inch lbs...the owners manual should have the numbers listed for those bolts..if not..get a chilton book ...if u plan on having this vehicle for a year or more lol...get a chilton repair manual cuz u will need it...lol..fill up the trans fluid to full when running and in park..don't over fill...let it sit and run for around 15 mins on a dry concrete surface and check for any leaks..I've just ran into a transmission that someone used gasket maker on and went overboard with it...every transmission guy I've ever spoke to says not to use that stuff ...get the name brand gasket from a reputable part store like Napa...it's not worth the few $ saved going generic when it's for the transmission...they're expensive to replace or rebuild...this was the first thing I did to my 05 LS when I purchased it...it had been slipping from second to third when I drove it home from the dealer...it hasn't done it since...hope this helps..
SOURCE: 4l60e slips in 3rd and 4th
There are to many things that can cause this problem, best thing to is go get the ECM scanned for DTC codes at a transmission shop or Auto zone or Parts Source since they scan for free.
The ECM should have DTC code in it's memory on how the transmission is Performing and have the Transmission line tested for Fluid pressure.
Good luck and hope this helps. Oh and also ways check with more then on transmission shop if there tell you that you need a new Transmission,
It could be a simple as the transmission filter falling off causing the lost of transmission fluid pressure. Check the transmission fluid too.
SOURCE: tranny slips & wont shift past 2nd gear
tranny slips can also mean that you may need to change the tranny filter. But just like cooking oil at first it is thick then you add heat and it gets thinner, same for tranny oil which could also mean that your tranny needs gear and plate work. The easiest way to find out is to insert the oil dip stick, clean it with a paper towel and check to see if you can see metal shivers or if the color of the tranny oil is not red but silverish, these are usually indictative of a tranny that needs an overhaul. hope this helps.
Good Luck =)
SOURCE: 96 chevy blazer 3rd gear and overdrive slipping
i got a 1996 chev. blazer s-s10 4.3 engine 4x4.problem i got is i got 1st 2nd & overdrive & reverse but no 3rd gear what should i do
SOURCE: Trans slips between 2nd and 3rd shift
MV could be the problem. Always work thru issue before buying ANY can of additive. Generally those things just mask the issue..not fix it. Change your fluid,and if that doesnt correct it,then take it in and have the tranny bands tightened. most shops do this relatively in expensively.
SOURCE: my 2004 montana shifts into 2nd an 3rd but wont shift into drive and there is no slippage
That is called overdrive. You have an electronically controlled transmission, so you must have the control module checked for codes with a special tool called a scanner.
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