Chevy - Trailblazer :: Transmission Component Slipping - Random Clunk Noise
Oct 13, 2014
Chevy trailblazer 2007
Between 1,000 and 2,000 rpm (only 20% of the time) I hear, and feel, a clunk that seems to emanate somewhere near / behind the driver seat. The error code (an 834 ? possibly but I forget exactly...but def in the 800 series) says " transmission component slipping".
Trans oil full, and clear.
The clunk sound happens on any terrain, and is very random. And going up-hill does not bring it on. The clunk's been happening for about 2,000 miles.
The orig transmission was replaced 15,000 miles ago.With a used one. Total mileage on car now 75,000.
Mechanics give varied explanations, and prognoses (none are good) but no one knows what's going on for sure.
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I have a 2000 mercury cougar 2.5 liter. I bought the car without doing much research. now that i have the car did research and found out all the great problems that this car has. My transmission started to make a clunk clunk noise inside and it started to slip. At first it would go on all gears. then very rapidly started to slip in all gears. In matter of hours went from being good to being crap. i had to accelerate the car to 3000rpm or higher to make the car start moving. So i bought a transmission from a junkyard. I install it and did not work. The car did not move on any direction. I pull it out and look at it and found the small shaft that goes from the torque converter to the gear body was broken. I end up getting another transmission from the junkyard. I check it and everything looked good. I install it and got everything back together and that work on reverse but no forward. To get it on reverse I had to accelerate the car to 3000rpm. I being told that if I change the solenoid inside the transmission might fix the problem. It could be the transmission module that is burned out.
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We own a 2005 Chevy Trailblazer, 8 cyl, 150K miles. Since July 11, the transmission has been slipping into neutral, usually when slowing down. This happens anywhere, and usually in slow (so far) traffic. My husband has been able to get the car to drive either in D3, or has been able to get it back into Drive, and the car just drives off like nothing happened. This usually takes a few minutes of turning it off and on, and shifting gears. Today he drove it in AWD, and it was fine (so far). He normally drives it in 4WD. They have been unable to duplicate this problem and, because there aren't any codes, cannot tell us what's going on. Needless to say, I've had it.
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It clunks real bad at random times. Whether I have had the e-brake on or not (sometimes even with it on, so I have not put any load on the locking mechanism in the tranny).
Its a 2014... Does not matter if its inclined ground or flat.
My 08 F350 V10 it replaces never once clunked.
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I have a 2004 TB that won't start. I pulled out my hvac b fuse to reset that system and now my car won't start.
The lights come on but don't dim, the 4WD indicators don't come on and all I hear is a high pitch sound and nothing else. I don't hear a crank. I don't know where to start looking for a solution.
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I have a 2004 chevy trailblazer LS EXT, the passenger side low beam has gone out, I have replaced the bulb and it still doesn't come on.. The fuse looks just fine to I have switched it with a new fuse and it still doesn't come on.. I don't know what else it could be?
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I have a 2002 chevy Trailblazer that when you put it into drive there is a vibration.It does not do this in park or neutral. I have checked the engine mounts and transmission mount, and they look good. The vehicle has a little over 118,000 miles on it and the engine runs and drives great except for this vibration that i do not know where it id coming from. What may be my problem?
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So my new/old 2004 has another issue. Parked at the grocery store tonight on a very slight incline backwards. Put the Ranger in park (automatic shift) and before I could fully engage the parking brake it began to roll back with a clunk, clunk, clunk as if popping out of gear.
Need less to say I moved to another spot that was more level. Just an hour before I parked the same way on a steeper incline and did not get this. Now I need to watch this carefully until resolved. How to remedy this issue.
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On highway, at higher speeds (50-70), I notice that the vehicle's acceleration will pause and the rpms will bounce a bit. Best description I can give is that it feels as if someone were constantly pinching and releasing the gas line. Short revvv...revvv...revvv. The vehicle doesn't lose power. I get where I am going. And it only occurs up at these higher speeds.
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New truck 11000kms ago thats done medium amount of work but nothing heavy or sustained for long periods of time. I get the feeling of clutches slipping especially when truck is cold but also when normal temps. Doesnt make any weird noises or anything. I can really notice the difference in torque if in manual mode being much better, but still not perfect if i stomp on the gas pedal and go through the gears in manual mode will still slip. Also is really harsh shift if i come to a halt in 3rd manual mode with the brake pedal depressed push minus button the truck makes very loud clunk noise into gear 2 then 1. Took it to ford they couldnt find anything ? Thinking of trying another dealer.
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'02 TB w/ code P0300 / Random misfire. Started the other day when it was very damp out, FWIW. Feels like ur driving on rumble strips during acceleration. Rough idle also. It does not do this continually though as after a while (minute) it clears up and runs smooth for a while then runs rough & light will again for a while. I seafoamed it today since it been about 60k since last seafoam. I thought that might have worked until I drove about 20 mile and it went rough again. I also cleaned the oil out of the cam sensor elect connector, since that caused rough running before, although it didn't throw that code. It seems to be very intermittent. '02 TB, 185k miles, orig plugs changed at 125k. Is it actually just going in & out of a limp-mode? O2 since it's random ???
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While driving at night time the headlights will go out at random. The marker lights will stay on and the lights will still not turn on if I switch the light switch from "automatic" to "on". When the lights are out I can use the high beams while in "automatic" or "on".
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I own a Trailblazer 02' LS and its at 152,000 miles at this point. I am currently debating on whether its a better strategy to fix this current issue (explained further below) or start saving for another vehicle.
The problem I am having is the truck will sound extremely rough at random periods when im off the gas pedal. Sometimes it will try and shut off but comes back to me when jam on the gas pedal. Also sometimes during all of this, The oil pressure gauge will drop to 0 and go back up once I hit the gas pedal.
Random things: AC buttons 1-4 don't work but 5 does sometimes. It also Idles at 500 RPM's instead of 1000 like I've seen on other newer cars.
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I have a 97 Chevy Malibu V6 3.1L with 92k miles on it, a couple weeks ago i started getting a misfire issue. The car would start to misfire when under heavy load such as accelerating up a hill. The local auto parts store diagnosed it with code P0302(cylinder #2 misfire). I started by replacing all of my spark plugs(ACDelco Platnum) and wires. This seemed to fix the issue for a day or so, after that the misfire worsened. I would misfire at random times and when under heavy loads. This caused my transmission to keep shifting up and down followed by the all to familiar hot/melted plastic smell of overheated transmission fluid. This continued on for a few days as it got worse.
The car than started to misfire heavily all the time. I took the car to another auto store and it pulled up codes for Random/multiple misfire. I then took my car to a mechanic for a full diagnostic, their computer said their was a misfire on cylinder #1, as-well as a bad spark plug wire on #1( He found this by getting shocked while wiggling the wires on the coil pack) and told me to replace the bad wire. I replaced all wires again and the problem remained. i took it back up for re-diagnosis and they then said it was a bad coil pack. I replaced the coil packs and the problem still remains.
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The first thing is that suddenly there's a clunk type noise from the transmission when shifting in to or out of 2/3/4. Also, when I'm in one of those gears, letting off the throttle and then re-applying lightly causes the clunk noise. However, I haven't noticed any actual performance difference, just the new noise. It's loud enough that I can hear it over the radio at a reasonable volume, and it may or may not be my imagination but I think I can feel it through the floor of the car.
The next thing is that in the mornings, the car seems to have trouble getting in to gear from a stop. So I'll pull up to a light, then stop, and if I take off the brake and get immediately on the throttle, the car will lurch pretty bad, even if it's only a little throttle. I've found that if I let off the brake, and wait specifically to hear/feel the transmission kick in, there's no lurch and everything is fine.
Also, on that same note, sometimes when I let off the brake at these times, the car nearly stalls. It hasn't stalled yet but it's felt close a few times.
As well, from a cold start, there is what feels like an absolute ton of engine braking in second gear, I can feel the car pulling back immediately after I let off the throttle, and this seems strange and new as well.
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I replaced all fluids trans filter and replaced all intake gaskets now it wont run rite and trans wont shift properly.
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I have a 1999 chevy silverado 5.3 4wd w/ tow package. I bough it with 30,000 mi. It has always had a hard shifting/clunk after long drives or sometimes short ones that involve a lot of elevation. Oddly, if I stop and shut the car off for a minute or two the hard shifting stops, but eventually starts again. The truck now has 160,000...still with the shifting issue. What is this and with this many miles is it serious?
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I looked threw the Front End Noise thread and there seems to be a few different problems. I don't have the Brake shim noise. Mine has a random clunk that comes from the front pass side. I took it to the dealer and as expected they had never heard of any problems ect even after I told them about the TSB for the brake noise.
Someone in the Original front end noise thread said that thought it could be a coil loading and unloading ect. This seems to be in the ball park of what my noise could be. The question is How should I go about get a dealer to fix it.
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I bought this 2010 f150 from the company I work for, front diff was shot, front drive shaft was in the bed, that's all I knew about the truck so I bought a complete front diff from a used place, it only has 58000km on it, good diff... So I installed the diff and the old front drive shaft, which doesn't seem to be in the best condition, now when 4 wheel drive is engaged I'm getting a constant clunk/binding noise from the front driveshaft area. Where to start looking.
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Well it's been 300 miles since Ford applied their "special grease" and put on clamps to eliminate the clunk when slowing and the slipping feeling at take off. Now the clunk is back. Every time at 25 it downshifts and clunks, then once again at 10. Drives me nuts. My service advisor wants me to "log" these visits so we can be more aggressive with Ford to get this resolved. I love the truck, but this is annoying driveline slop. Almost like the splines weren't cut right and Ford is using heavy grease to fill the gaps......developing...
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My tranny slips in drive and od when it is warmed up.It's fine for a few miles when it is cold.Did a quick search and it seems like it might be a bad mlps.
My question is, Will a bad mlps act up all the time or just when it's warmed up? Will a mlps and connector from a 91 tranny work on a 95 tranny? Don't really want to throw money at it if it will need a rebuild.
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