Chevrolet - S-10 - Transmissions :: Downshifts Going Downhill - ABS Light Goes On At 75 Mph
Apr 3, 2011
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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My girlfriend has a 2007 Volkswagen Rabbit, and she said that occasionally when she slows down as she's getting off the freeway her car downshifts from third to first really quickly and she's concerned. She took it to the dealer but, of course, they couldn't tell what was wrong because it only happens on occasion. They said it might have something to do with the brakes pumping if she slows down too fast. The car has 60,000 miles on it.
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New 2016 - 6.7 automatic with exhaust brake:
In tow haul mode is the exhaust brake automatically activated or do you still have to turn on by button? Getting mixed answers, and seems to me that it does not activate unless you push the button which is seems to be what the literature is saying.
On steep downhill pulling heavy trailer, in tow haul mode every time you hit the brake it downshifts, and isn't long before it will over rev, unless you kick it out of tow haul mode. is there a way to hold it in a gear in tow haul mode? Or should I shift into manual mode at the top of the hill then use the +/- buttons.
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First, the specifics: 1993 Ford Tempo 4-cyl Auto 78,000 miles (the proverbial little old lady car.) From a stop, the car will rev clear up to about 30 mph before shifting out of first into second. It will stay in second well past 60 mph, and even then, I have to kick it hard to make that happen. It's not that it won't shift; bit it seems to delay well past where it should. If I do manage to get it into 3rd, there's a pronounced thunk when it downshifts at a higher rev than it should when I slow down.
Now the background & other info: It's not my car. My B-I-L lent me this car because I ride a motorcycle all winter, & he took pity on me for the rainy & snowy days. In return, I offered to fix an annoying rattle. The problems went well past that, of course. The second day I drove it to work, it overheated and spewed clouds of steam in the parking garage. I had to have it towed home. That turned out to be a split in one of the heater hoses.
Disturbingly, however, the temp gauge on the dash never rose off of "C" on the ride in. I had expected to be replacing a water pump, but the heater hose seemed to be the only issue. Just the same, I replaced the thermostat and the temp sensor because I suspected the burst hose was a symptom, not the cause. Sure enough, after it's all put back together, the dashboard temp gauge is working better, and a short hop to the grocery store showed no overheating. At least that problem seems solved.
Prior to the coolant issue, the car drove fine (for one day); the shifting problem only surfaced afterward. As a last piece of info, I'll add that I had to add an entire quart of transmission fluid to bring the level between the marks. I didn't check that previously, so I can't say if that was a pre-existing condition. So then - what's the fix here? Could an overheated engine cause the tranny problem? Any chance this can be fixed simply? (FWIW, the rattle is the A/C pulley.)
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I was on highway doing 75 with cruise on. All of sudden the truck downshifts and continued to do this while on highway but not surface streets. Is it tran auto relay switch or solenoid (I have no leaking). 1996 s10 4.3l v6...
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The following issue has been stumping every mechanic that I have talked too. We have a 1948 Chevy with a 350 ram Jet and 700 R-4 transmission. The water temp while on the road runs about 180, and up to 195 in town. The following is the problem. When coasting down a hill it will periodically quit, like the key was turned off. I have to through it in neutral, start it, and then put in drive while rolling. It never has done it at idle, on straight a ways, or up hill. No, I can’t avoid going down a long hill sometimes.
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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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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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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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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 2007 Chevy Malibu with around 190000 miles on it. Recently, first thing in the morning then I start driving, that car will not shift into 2nd gear for a bit. The engine will rev up the 2000 RPM and stay there. After a while it will finally shift. The fact that the engine stays revved that high for that long makes me nervous.
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Transmission comes out of gear and has a loud whirring sound when in reverse, but not every time. it has happened when driving at about 60 mph (twice) Sometimes it happens a couple times in a row sometimes it is ok for a couple weeks.
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What is the easiest (DIY) way to replace the Vacuum Actuator (switch?) in a 1995 Chev Blazer with an Automatic Transmission, 4WD?
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My girlfriend's 2001 cavalier has about 160k on it and about a week ago it started shifting harshly accelerating to highway speeds and the CEL came on along with the traction control/abs warning light. I pulled the OBD2 code and it was P0742, Torque Converter Clutch Circuit Stuck On. We took it to the transmission shop down the street the next day and they wanted $600 to diagnose. We called 'shenanigans' and decided she should take it to her regular shop. On the drive over the transmission shifted normally. Both shops noticed that the transmission cooler lines were rusty and seeping, but neither thought it was the cause of the problem. The shifting issue hasn't recurred even after a couple hundred miles during the week. She hasn't had the transmission fluid changed and doesn't know if it had been when she bought it about 80k miles ago. It seems to me that pre-emptively draining the fluid, changing the filter and refilling, especially to check for debris in the fluid, would make sense, especially if it was debris jamming the circuit that caused the error code in the first place.
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I've been watching my mother's 1976 Fiat convertible this summer. It had been taken to the shop about 6 weeks ago and it's been running fine without any problems. I had to leave for about three weeks and now the car will not start.
When I turn the key in the ignition with the clutch engaged, the engine turns, but pressing down on the gas pedal has no effect. The engine doesn't rev nor does it catch. There is gas in the tank and clean oil. I checked all the connections I didn't find anything loose.
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My 2001 Saab 95's engine periodically downshifts. Usually the downshift happens after some highway acceleration. The ABS light turns on at the same time as the downshift. The road conditions are always dry. The downshifting started last summer and has continued during the winter months. The alternator was recently replaced but the downshifting periodically continues. MY Saab repair shop cannot figure out what the issue is.
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My daughter's 2002 Saturn S-series coupe has a manual transmission. Lately it has been jumping out of 2nd gear, and occassionally 4th and reverse. What is the most likely cause?
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