Chevrolet - Suburban - Transmissions :: Occasional Shudder On Acceleration
Sep 3, 2011
I have an 82 GMC suburban with a 6.2 diesel, TH400 transmission and a NP265 transfercase. The last day of June we moved from Greeley Colorado to Southern South Dakota. Tems were as high as 107 that day. I had to stop several times to let the transmission cool. I didn't want to burn it out. I was towing a Hyundai Accent (2002) on a Uhaul Car Dolly. The trans temp gauge registered as high as 210 degrees. If it got hot I would stop and let it cool. However recently I changed the rear axle, the pinion spider gears seized and exploded. I think I went from a 3.73 gear to a 3.08. However I am not certain. Certainly seems like it when I pass people at 30 according to the speedometer that used to pass me. However, recently it seems to have developed an occasional shudder as I accelerate. It's mainly after alot of in town driving. I checked the brakes, serviced the rear end, and checked the fluid levels.
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I have a 99 Suburban with very high miles. Going on 306K mostly highway miles. This is our baby and the best vehicle I've ever owned. This is a solid vehicle that I think we can get more miles out of.
The problem is that it will intermittently surge or shudder between 40-60mph during acceleration. It's hard to pinpoint because it doesn't happen all the time. It seems to be worse if the vehicle is low on gas or the engine is cold but I'm not certain about that. It's not hard enough to call a buck, jerk, or sputter though. Maybe I've over-analyzing but basically it will shift to the correct gear and then back down then back up etc., and back and forth for very brief seconds. Then levels out after 60mph and there are no other problems. If the gas is low or engine is cold is does this in lower gears as well but usually only around 4th gear. I hope this description makes sense.
Here's where I'm confused. The transmission was rebuilt 2 weeks ago specifically the torque converter and rear planetaries. The day we got it back we performed a tune-up so all new plugs/wires/cap/rotor. The fuel filter was replaced about 8 months ago and the fuel pump 2 years ago. All regular maintenance has been performed on time since we bought it 4 years ago. Yesterday the Service Engine Soon light came on and it only showed one code (OBD II), PO161, so we replaced the 02 Sensor (Bank 2, Sensor 2).
However the problem persists and there are no other codes providing any direction. I've tried to search the internet for drivers with the same issue but the fixes vary too much and seem uncertain.
Other known issues for diagnostics: four wheel drive hasn't worked for years (haven't needed it in our flatlands) and ac compressor went out last spring.
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I have a 2012 Camry LE. When I let off the gas between 25 & 40 mph, the transmission aggressively brakes. Occasional acceleration surges when braking. And when I need to go, it sometimes does not want to go until I punch it. All problems are sporadic.
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My 07 Honda Accord has an occasional popping and clicking sound. It happens most when I'm in reverse and cutting the wheel into a parallel park. My mechanic thought it was a transmission issue and did a transmission flush...but it's not happening when I'm switching gears and it seems and feels to me like it's more in the body of the car.
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I have a '98 Sienna that's still running well (271k miles) but about a year ago it started acting strange, just a rare but minor irregularity in the normally smooth engine. A few months ago I changed the fuel and air filters, but that didn't affect it. So I tried changing the tank pick-up filter and confirming that the tank didn't contain any gunk. Again, no change. Since then the engine light has come on, but it still runs well enough for now. My fuel pressure is solid (manual specs, 50psi I think). I'm not sure if it's too rich or too lean, but I'm convinced it's fuel related unless someone has a better idea.
My suspects: fuel pressure regulator (in the fuel tank), clogged fuel injector(s).
Other potential clues: 270,000 miles on the original engine. No smoke (that I've noticed). After changing the filters my fuel pressure was perfectly solid at manual recommendations (50psi if i remember correctly). New battery, new fuel cap (factory cap; sometimes store-bought ones don't vent correctly). Sometimes the fluctuation goes away for a day or two, while other times it's hard to accelerate uphill at highway speeds. The issue is not clearly affected by temperature (same when 40° or 80°). It was much less noticeable when I drove to Montana this winter; they have a winter blend, which might have masked the problem (or the higher altitude). It's possible I just didn't notice it as that drive killed my steering pump and a CV boot, so my focus was on other problems at the time. I found today that can I make it shudder a little at highway speeds: letting up the pedal for a moment and gently giving it a little more gas causes a gentle shudder, and very rarely what sounds like a small muffled backfire.
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My "pride and joy", is sitting at the dealership. The car has been hesitating on acceleration, occasional it would also stall. According, to the dealership a faulty gas tank is the culprit. The tank has been ordered. Hopefully, i"ll have the car back in two weeks. What parts were replaced, to fix the problem??
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2002 AVH Jetta Wagon. When I got the car back in 2012 it had 121K and I changed the wires (ngk blue 57021) and plugs (ngk platinum) and she drove like a dream. A couple of months later I started having issues with wet weather and moisture causing misfires so I did the JB WELD fix and though I'd still get the occasional misfire in hard rains it lasted me pretty much until very recently, when I decided I needed to put in a new coil because the problem was getting worse (hardly starting up after a rain and bucking wildly till things dried out). Yesterday, I replaced the BERU with a new HUCO and the car started up fine and drove fine all day. I think there was a lot of moisture in the air last night and possibly some rain but this morning, SAME PROBLEM with a new coil. Misfiring like crazy, no acceleration.
I thought the NGK wires and plugs I got were rated to last beyond 20,000 miles. At this point should I assume the wires are to blame? Split somewhere or something? It's definitely related to water and the electrical system.
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At around 70 mph when I am going down a hill the automatic transmission will shift down from overdrive into 3rd or even 2nd gear. It should stay in Overdrive. I have to tap the gas pedal to keep it in overdrive. They already looked at the TPS. Also, around 75 mph my ABS light goes on and stays on until I restart the car. Not sure if this is related. Just had a complete brake job.
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I have recently run into a problem with my transmission on my van, mainly that it won't drive forward, however reverse seems to work just fine. Prior to the problem: Before it stopped working altogether, there were a few symptoms that I should tell you before we get started. First, upon starting the vehicle and putting it into drive the vehicle acted like it was in neutral, or barely crawled forwarded. If you waited a few moments, or pressed the accelerator, it would quickly engage and once it had been driven for 5 minutes no more problems shifting gears would occur.
I attributed these problems to low fluid and/or cold fluid (as the problem would noticeably become better/worse with warmer/colder conditions respectively) So I was content with topping off the fluid and seeing if the problem persisted consistently when it got warmer. 2.) There would be at times a loud clunk when the gear finally engaged after pushing the accelerator.
I have a repair manual for the van which has a trouble shooting guide and it said to check the universal joint. I did, and it seemed intact, rust free, and fine. I researched it a little more and did not see any indications that this was an awful horrible problem, so again, I decided to wait until the weather changed to investigate further. Problem: One day I drove the van to north Austin and left it in a parking lot for a few hours while I went inside. When I came back out and started the vehicle it would not engage 'drive' no matter what I did. It has since been sitting in the parking lot for about 2 weeks and the owner finally gave me the boot so I pushed it out onto the street.
What I have tried: I found a leak where the transmission fluid connects to the radiator (a hose was clamped too hard) and seemed to have fixed that problem. So that solves the problem of why there was low fluid in the first place. I took the doghouse apart and replaced a few vacuum lines that were extremely worn and damaged. At one point this was causing the van to stall immediately after starting, but have since been fixed. I checked the shift linkage where it connects to the transmission housing and, luckily, was able to view the dial on the transmission case where it connected; all moves of the shifter do in fact engage the dial and turn it. I pulled the two electrical connections off of the transmission housing to inspect them for burns or corrosion, although I would doubt reverse would work if they were damaged, and found none. They seemed to be in fine shape. The throttle cable seems to be fine. The speedometer cable is missing I believe because I can't find it and the speedometer doesn't work. However, unless I'm missing something this wouldn't cause the problem. Fluid seemed dirty, but I did not feel that is had be roasted over a fire pit (indicating burned out parts?)
Possibilities: I am going to drop the pan today I hope and investigate a little further inside the transmission. The transmission fluid does NOT seem to be getting any hotter than luke-warm. From what my manual tells me this should not be. Transmission fluid should get to a point where it is too hot to comfortably touch. I am wondering if this could be caused by one of three things a.) Broken pump not circulating the fluid b.) Clogged filter - fluid unable to circulate c.) No vacuum - not allowing the pump to get adequate air pressure to operate. I am wondering if, maybe, the fluid is not being warmed enough to expand correctly to let the transmission operate.
I have heard that these go bad, but are cheap and easy to replace. I have put this option off because I'd assume the regulator controls more than one thing and so if it were broken something like say, the fuel system would be affected as well. Maybe I'm wrong? Could it also be the hose itself? I think there is also a short somewhere in the electrical system, although I think it's located in the heater wiring, because the battery will drain heavily when it rains and the heater is engaged. I have read somewhere that this may cause the transmission not to operate properly, but it seemed to me like it is something else. In any case, I have been stuck in Austin now for quite some time, don't have money to pay a shop 2,000 to diagnose, over charge me for parts, and charge 10 hours of labor for a rebuild when you can buy these transmissions, it seems, for relatively cheap. I am hoping this is a relatively simple problem that someone here would be able to recognize and diagnose, or at the very least be able to say: "Check and fix these 4 things and come back." I'm trying very hard to learn this car inside and out and the repair manual I bought doesn't want me playing with the transmission at all - simply says "take it to a pro chump"
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2000 Chevy Blazer 4.3 (automatic) - When I bought it used, it shifted fine, has no issues other than the transfer case wouldn't engage every time. A few months later my overhead console display lights went out, then all the dash lights such as engine, 4x4, the gauges started lighting up and acting weird randomly, then a week later the truck started shifting funny.
Now 90% of the time, the truck won't start in 1st gear, it starts in 2nd, then while accelerating up to 30-35mph it will shift up way too soon and bog down, then shit back down to 2nd, then shift up again, and continue until it hits 30-35, then it fails to shift into overdrive. Also when coming to a stop, it kicks down a gear (into 2nd I assume) pretty hard and clanks pretty loud around 2mph just before a complete stop.
Weird thing is every once in awhile, it will go away and shift normal but the engine light is usually lit up during normal shifting.Could it be the ECM causing all these weird things?
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I went to drive my 1970 Nova today and after driving it for about 15 seconds it seemed to stick in second gear. I cannot get it to go into neutral to be able to put it into any other gear including reverse. The shifter is on the floor. I have no clue what is going on- If it's something with the linkage between the shifter and the transmission or something with the clutch. It has never acted this way before and gave no indication that a problem was on the horizon.
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I own a 2002 Monte Carlo SS 3.8 6cyl. I believe it has a 4T65-E transmission.
On a regular basis if I drive 20 miles out of town, on my way back the transmission starts to shift hard (long shift?). From my research online, the 4T65-e is a faulty transmission to begin with. Is it worth replacing the Shift and Pressure solenoids? If I were to buy a new transmission where should I look? What are some model numbers?
Oil, trans fluid, filters are changed on regular basis.New catalytic converter. No Check Engine Light.
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Grinding noise in front end, replaced caliper, bearing, brakes and cv joint...
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I have a 98 Express conversion van and when I start the van and pull away the van has trouble shifting between first, second, and third. It acts like it hiccups before it changes gears. I have to manually shift between the first few gears until I get to 55-60 miles an hour, once I get there and slow the van back down it will automatically shift like normal. I will not have any other issues until I turn the van off, as soon is I turn it off something resets and I will have to get it up to 55 again to get whatever it is to click in to get it to shift properly again. I can't figure it out?
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If sensor or control module malfunction. Brakes are fine. If ABS relay, so where is it located, cant find in fuse box. This is a 1500 2WD suburban.
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I have an '04 chevy tahoe, only 70k. Very recently the front end of the car has started to shutter while driving. This happens when I am going generally above 45mph- more so going up a hill. It feels a little bit like I am driving over unevenness/ripples in the road- even when it's smooth flat pavement. When I take my foot off the accelerator and just coast the vibration stops. I got new tires put on front so it is not a wheel balance issue. The car does not pull left or right either like out of alignment. And the engine rmp's do not fluctuate/strain when the shuttering starts.
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I have a 2010 Camry 2.5 liter with 150k miles. I have begun to notice a shudder around 30-45 mph during normal acceleration. It does not happen during a hard acceleration. As I watch the rpm's when the car shifts the shudder happens after the rpm's drop when the car is engaging in the next gear. After some research I'm led to believe I have a failing torque converter. If it is the torque converter can just the converter itself be replaced or does the whole transmission need to be replaced.
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My 2003 Suburban shakes when I drive over 70 mph. I don't know if the tires need realignment?
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I have a 1990 suburban that has had a rebuilt x-mission about 50,000 miles ago. At this time when I drive there is a hesitation, split second, when running on flat road. It happens when going up a hill, too.My mechanic said change the: plug wires, then the plugs and rotor. No difference.
I think the thing is dropping out of OD for a split second and then going back in. If I drive in 3rd, I don't think it is happening. Isn't there a relay or solenoid that controls this function?
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I have an '05 Suburban with starting issues. When it's cold out (below 40 degrees) and you turn the key, all accessories come on but truck will not crank. It then seems like the power just cuts off.......dash lights go out but gauges are fixed in place and a couple of seconds later, I hear a strange buzzing noise from the dash area behind the radio and the gauges will then go to power off position. Then if I try to start it, there is nothing, no lights on dash, no starter engaging, no clicking of the relays, nothing. I tried, on a hunch to disconnect the ground lead from the battery. Had it off for 10 minutes or so, put the cable back on, tightened it down (wasn't loose to begin with) and it started right up first try in 20 degree weather. I had previously had the battery and alt checked and both were good.
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2007 Chevy Suburban, 65K milesLet me start by saying I took this into to the dealer and they found nothing!
When I accelerate, I get a "flutter" in the engine. The best description of this flutter is that the RPMs go down about 200 or 300. I think it feels like it is sluggish when it accelerates. It is most obvious during the 35 - 60 MPH range, but you also see it when cruising at 70 MPH.
I tried adding some fuel treatment and ran some 93 octane through it to see if it was the fuel injectors, with no change in the behavior. No error messages or engine light is on. Regular oil changes and services (60K service, every 3K miles for oil change). Driving behavior has changed since I bought a Prius 3 months ago. It used to be driven 40 miles / day (+ long trips) and now is driven about 40 miles / week (+ long trips).
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