Transmission shifting problems


Asked by May 06, 2015 at 12:10 PM about the 2008 Chevrolet TrailBlazer LT1 4WD

Question type: Maintenance & Repair

When I take off in drive the seems to hang between gears and engine will race. I can
slow down and manually shift into the right gear and it will start shifting properly. This this
does not happen every time I start off from stop.

21 Answers


Sounds like the solenoids are getting sticky inside the tranny, you can try servicing it, putting a quart of TransX and then fill to specs and drive as you normally do, this will help cleaning the solenoids, if it is going to work it will in the next day or two, if things don't change then you will have to replace the solenoids. Eventually you will have to replace them.

10 out of 10 people think this is helpful.

Thanks for the info took car to transmission shop. It was checked out and turned out to be selenoids.

5 out of 5 people think this is helpful.

Glad you got right on this and fixed it, so many just want to get by as long as they can.

1 out of 1 people think this is helpful.

needs some help by any chance do u know why my tranny didnt work after i change both solenoids

7 out of 7 people think this is helpful.

H, did you have codes for the solenoids? Or was it trans control codes?

4 out of 4 people think this is helpful.

yea i forgot to erase codes thats why it wasnt working but now it is ..but i have had this problem for a month see if u can help me out same 2002 trailblazer ltz 4wd 4.2 6 inline plugs my check gages light turns off and on wen ever it feels like and wen that happens forces my engine fan blows hard my temp gage goes from 100° to 260° but my car is not overheating every morning wen i turn my blazer on temp gage goes rapidly to 269° even if my engine is still cold i already changed water pump thermostat temp sensor belt and its steel reads code p0117 engine coolant circiut low input i dont know wat to do anymore also wen the check gage comes on it reads engine coolant hot idle engine even if the engine is still cold i could just turn key on and that happens.. driving me crazy already need a good answer and help please and wen the check gages light comes on it doesn't read the five volts is suppose to it reads below 2volts and wen lights off it reads the five volts let me know if i can do something to fix it on my own please and thanks for responding to my questions

1 out of 1 people think this is helpful.

What you are describing sounds like an intermittent ground problem, unfortunately there are a mess of grounds on this rig, both inside and under the hood, if you want to attempt this I would advise you to get a good shop manual with wiring diagrams and component locator, then grab your wire brush, emery paper and start cleaning the grounds. HTH

3 out of 3 people think this is helpful.

wat is hth and thanks for ur answers appropriate it alot ill try that but would it efect if i put a ground wire directly to the black ground wire on the sensor just to see if anything changes and so do u think the pcm modual or computer i guess is the same thing but could it be damaged

1 out of 1 people think this is helpful.

HTH is hope this helps. You have to be very careful running ground wires, you can do that but make sure you only use the main grounding mounts, not just a sensor ground wire, you can also run separate ground to each of the points you find from a reliable grounding point, but make sure you have a ground and not a sensing wire or power feed, 12 or 5 volts, or it will cause expensive damage. You might also check the contacts on the back of the instrument cluster and the cluster grounds. I know this sounds involved but it really isn't if you have the connection points in the shop manual it reduces time involved and you can trace out each circuit.

1 out of 1 people think this is helpful.

ok thanks very much for ur help ill try and run only one ground wire from the sensor to a grounding point and i will definitely not try to power feed to any sensor that could effect my vehicle just one ground i will run thanks again and have a wonderful evening

1 out of 1 people think this is helpful.

Hi i have 2006 trailblazer when i put in drive it shifts through first 2 gears and when it goes to 3rd it slips and idles up. I have to put it in 2nd to go hoping i dont need transmission. Any help is appreciated thanks

57 out of 57 people think this is helpful.

i have a2002 ltz and it will not shift from 1st to second without letting off the gas. The vehicle speed sensor was changed. Any and all advice is apprecitaed. tyia

19 out of 19 people think this is helpful.

I have a 1995 s10 blazer and it would appear that the same problem has been apparent since this blazer if not before, and up and to the current models and I cannot believe they have not corrected this yet!!! , or even at least to all of your helpful comments Up an 'till the 2006 model yr. Scott~LittleRiverSC.

1 out of 1 people think this is helpful.

Like I said above, I have a 1995 s10 4x4 4dr blazer w/212k on it. I was told to put Lucas in the tranny, so that's what I did with NO resolution to the shifting problems!! I only drive it to the grocery store once a month, but I either need a quick short term fix so I can sell it or I need to resurrect it for another 30-50k. Any help would be greatly appreciated !! Is this blazer even worth keeping or should I just try to sell it as is? Thanks again for your help Scott~LittleRiverSC. Eightsixzero nineeighttwo seventhreefourtwo

4 out of 4 people think this is helpful.

hi i have an 07 trailblazer ss when i put it in reverse it doesnt move i can put it in drive and it goes but no reverse any ideas on how to fix thanks

2 out of 2 people think this is helpful.

Sorry Anthony, I haven't received any answers to my transmission issues either. Now my blazer is dead in the driveway. Best of luck to you. Scott

1 out of 1 people think this is helpful.

2007 Trailblazer Not shifting in to the 3rd gear... (slipping) Lucas mechanic in a bottle did dick. Hope it's an easy fix because I bought am older car to safe money. Shit.

1 out of 1 people think this is helpful.

If it is slipping it most likely needs overhauled, if the trans fluid is dark and smells burnt that is a sure sign of a trans in need of a overhaul.

1 out of 1 people think this is helpful.

Which is expensive right? ... It actually was most our of fluid yesterday and I dumped in a bottle if Lucas and a quart of transmission fluid. I have driven 10-15 miles since I did that but only Reverse, 1st, 2nd work like it is supposed to. In drive it takes off normal but once you get to 50mph or so rather than shifting down it revs up. It is over full now by the way...


Yep, between 800 and 1000 bucks in my area, I have heard of some people that have drove through that they have paid as high as 2 grand, I guess it all depends on your area.

Anthony, your transmission likely blew out it's sun gear housing. This is a common problem on the 4l60E transmissions. If the housing did blow out, you will also not have second gear, resulting in a hard shift from first to third.

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