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Drives

Found 14 results

  1. Fixed! See page 2 update. Rebuilt Trans! 2014 Sierra 1500 5.3 120k miles Hey all, I searched and read some of the transmission threads but it wasn't helpful so hoping someone can guide me or had the same issue.. Truck has been running great no issues, one morning i go to work as usual and half way into the commute i get this skipping/shudder when under load. I let off it goes away. RPM is steady at idle and its not doing it or is not noticeable in cruise. No codes. Does it in Manual, all gears and all speeds. Only when i get on the gas. Power is less, it feels like a slipping trans but also feels like a misfire. Plugs are assumed to be originals so tonight im replacing all to see if it fixes it, if not: they needed to be done anyways so no harm done. Trans has been flushed at 95k at GM dealer. My next option is another flush. Any ideas?
  2. Anyone know what this noise is? It's very intermittent. Seems to do it most often between 40 and 50 MPH cruising with maybe a slight up hill. Never does it on coast or heavy acceleration. Very hard to tell where it's coming from. 20190521_191545_001.mp4 2014 Sierra Denali 1500 Crewcab, 5'8" bed 6.2 Litter 3.42 axle ratio about 118,000 miles
  3. Long time reader and first time poster. I recently started to have vibration issues with my 2015 Yukon Denali. It started after the last scheduled oil change and tire rotation. I noticed the vehicle vibrating quite often. I started paying more attention to it and realized there was a shudder in-between gears that became worse as the transmission warmed up. Took it to the dealer I purchased it at and it was a bit of a fiasco because they were backlogged and ended up taking it to another dealer who performed 2810175 (updated TCM with latest calibration and relearn). They handed me the vehicle and said all fixed. Took the vehicle home and it seemed to be ok but started noticing the shudder again. One question is after this, is it expected that there should be a relearn time for X miles while its relearning the shift adapts/pressures? Is there an estimated number of miles for this? It seems to shudder less often but when it does it seems worse than before. I've only driven it about 60 miles since the recalibration. I'm fully aware of PIP5337 and asked them about this but they said the TCC was not bad. The vehicle was purchased June of 2015 so its definitely manufactured before November of 2015 which PIP5337D mentions. As I drive it more and more, I feel less of a transmission shudder but more road vibration than I felt in the loaner 2016 Yukon SLT or my wife's Kia Soul. I'm wondering if its possible they rebalanced improperly. The road vibration seems to be at lower speeds. At higher speeds it is better but may just be the quality of the roads I am driving on at lower speeds. I do notice the TAC jumps about 100 rpm during most shifts and not sure if this is normal. It seems to do this when the TCC speed should be 0 (around 2000PM) shifts. I realize it would not be fully locked under 1600RPM. At this point, I am not really sure if I am just paying too much attention to every bump on the road or if there is an actual issue. Are there any objective ways to determine if there is an actual issue and express that in a way that will not completely annoy the dealer? I have already had to pull this vehicle from one dealer because they were so backlogged it would have been in the lot sitting for repair for 23 days. With that said, they planned on doing a tear down on it to inspect and thought it was the TCC. Any help or guidance is much appreciated. Thanks!
  4. Our 2017 2WD Colorado Z71 with 33k miles started making a knocking sound at low speed, worst at around 20mph, sometimes more noticeable than others. First the dealer put it down to normal tire noise, then a few months later when the noise got worse said it was cupped tires and that we needed to replace them. They recommended less aggressive tires as the "stock" all terrain tires always cup and make noise apparently. So, we had a new set of tires put on and the rhythmic thumping was still there, more obvious now that it wasn't masked by tire noise. The noise seemed to come from the front of the car and was noticeable at low speed 10-20mph and would speed and slow with the car. Once you're tuned into it you can hear it/feel it around 40mph too but its more of a vibration. Took it back to the dealer and test drove, they heard the knocking and decided to replace both front hubs under warranty. When we picked the car up they said the noise was gone other than normal truck noises, on the drive home it obviously wasn't. In fact it's worse under some conditions. Now it seems that either the problem is getting worse or we're hearing/feeling things that aren't there. The knocking has become stronger but only sometimes, and at highway speeds it feels like the whole truck is buffeting and vibrating. It also seems to be slipping gears, or shuddering between changes at low revs. Having taken it back tot he dealer they say there's nothing wrong, they can't hear or feel any problems, and to be fair to them the knocking was less noticeable when I drove it with them but the vibration and shudder was there. I did ask to drive a new one so I could feel the difference and perhaps it's just normal but they didn't want to do that. I've now left it with them and asked them to test drive it more and if they're happy there's no problem then I'll pick it up and if it comes back I'll take it somewhere else for an independent test. We're 100% sure on the rhythmic knocking/thumping, especially as it's the same issue before and after the tires and hubs were changed, perhaps this is normal. As for the vibration and buffeting we're less sure, it does seem like it's slipping gears and shuddering but after so much focus listening to the thumping perhaps we're just seeing problems where none exist. Does anyone else have any similar experiences, or are we truly just going a bit nuts?
  5. Hi all, I am new to this forum and decided I would post about my issue since I can’t seem to find anyone with the same issue on a 6speed 2018, only 2017s and below... I have an extremely annoying fish bite/stutter when cruising up light inclines on the highway and while the stutter is happening, my RPMs are bouncing ever so slightly (probably about 50-100). It’s minimal bouncing but it almost replicates what would be a misfire or a transmission issue. Truck has 22000 kms on it. I have been dying to get a Diablew tune but I really want to see if I can get this issue fixed beforehand. I brought it to the dealer twice and they checked the TCM for updates and nothing. They checked for TSBs and nothing. They took it for test drives and “could not duplicate the issue”. I’m getting sick of my dealerships lacking desire to fix my issue. Has anyone had this issue and got it resolved? Would love to hear any feedback. Thanks.
  6. Who has replaced their factory rear driveshaft: Why? What brand or what type of custom build? Type of mods to driveshaft? Steel vs. Aluminum heavier/thicker walled/stronger Length added to accommodate lift kit? Heavier U Joints? Two piece? Cost? Results? Additional Advice or comments? Feel free to add in any field I neglected to mention. *I searched, but did not find a dedicated replacement driveshaft thread.
  7. Well my truck has a shudder when in high gears, it's like hitting the rumble strip, rpm fluxuates 100 or so 150k miles on it all maintenance was done Dealer says needs a new transmission This truck was hardly worked I've owned gm since 1975 very dissatisfied and disappointed with lack of concern Just letting you know after calling around to different dealers, GM knows that issues begin with some transmission around 120k 4500$ repair and only a 50k warranty, shows their level of confidence Good lluck
  8. Hello all! First post here! What brought me here was the 8l90 torque converter lockup shudder issue. Most times I'd just take this truck to the dealer and let them sort it out, but as it's out of warranty, this is not something I'd like to pay >$600 to repair (this price was quoted to me for the flush and filter change). After talking to a few service advisors I've found that each of them planned on using a different solution to attempt to alleviate the shudder. The first was going to proceed via one of the bulletins and do a triple fluid swap and filter change, the others were just going to do a standard flush and fluid swap. I plan on owning this vehicle for another few months until the 19's become a little more negotiable but cannot stand to let this shudder go on that long and am a bit worried about destroying the torque converter in the process and washing a whole bunch of parts down into the transmission. So.... my question is if anyone has performed this fluid swap themselves, if it alleviated the issue, and if the filter change is necessary? I saw that many of the Corvette guys were swapping to the Mobil 1 fluid with some success, however, I didn't think this was as much of a fluid performance issue as it was a suspended clutch material / dirty fluid issue. Any help would be greatly appreciated!!!!!!
  9. I recently bought a used 2016 Sierra Denali 5.3L 4x4 in March with 48k miles. Truck has been great until yesterday (now 52k miles) when I ease into the gas it shudders and shakes like crazy until i punch it. The tach is bouncing up and down and it doesn't matter if it's in v8 or v4. It almost feels like it's a misfire but it's weird that it only does it when I'm easing into the throttle or going uphill. The truck has the 8 speed transmission. Has anyone else ran into something like this and would the manufacturer warranty cover the fix for this?
  10. IS THERE ANYONE OUT THERE WITH A HIGH MILIAGE GMC CANYON 8 SPEED - HOW MANY MILES? Or Colorado of corse. I had to have the torque converter replaced. It seems to be doing fine now but only 17,000 mi. on it and only 2,000 of those with the new torque converter. heard of several starting to shudder again after a while. I'm trying to figure out if this truck is worth keeping or I should get rid of it while its newer and worth more money? Any help would be appreciated. Thank you in advance for your response.
  11. So I finally gave up on waiting for a fix for the 8 speed and its many mis-behaviors and had my truck tuned by a local custom tuner that has been working with LS/LT motors and transmission tuning for many years. He plugged in his laptop and rode with me for over two hours. The truck is a new animal. Great at shifting and the engine acts like the beast it should be. My truck is a 2015, 6.2L 8 Speed, 23,000 miles. It has always had the low speed clunk and recently developed the shudder, especially in 8th at steady state highway speeds. Here is some of what was done. AFM shut off, Torque Management shut off, Variable cam timing adjusted to performance lift, 1st gear set to hold until 11 mph, higher shift pressure for next few gears, torque converter set to 0% slip, raised speeds for converter lockup especially in 8th. Other parameters were adjusted, but these were the main ones. Some of what was learned. The TC was slipping too much when trying to lock at light load (half in half out) causing the shudder. It was also trying to lock at too low of a speed/RPM almost lugging the engine (again most pronounced in 8th). No more shudder in any gear. It does take a decent speed (over 60-65 to lock up in 8th, but once locked it will stay locked below 60 unless I kick it in the pants or the load increases). As most of you experience, 1st gear was trying to get to third as quickly as possible. Now I can move through parking lots without trying to throw a U joint. There were more learnings but these 2 are the big ones. I will probably lose a bit of MPG in town driving (I am fine with that) but the 60 mile trip home at freeway speeds netted 20.1 MPG ... not enough loss to consider if any. Performance is incredible. I floored it from a stop a couple days later, and had to back off to preserve the tires as it started roasting them. Shifting at full throttle was impeccable. Longevity (as long as I dont drive it live a sports car) theoretically will be better than it was with all the clunks and shudders. I am thrilled with the results. If any of you live near Van Buren Arkansas, and are interested I will pass on the contact info.
  12. I have a 2016 Silvarado LTZ Z71 4x4 with the 8 speed... About 13,500 miles on it and it's started to develop a "shudder" and it's been shifting harder. On cruise control it will shudder at around 1300 rpm with speed staying constant. I've driven it in manual on new roads at 35 MPH and it also shudders around the same RPM range. We're talking about vibration enough to shake the steering wheel. Almost the same effect as driving over bumps in the road. When driving it very aggressively at higher RPMs the issue isn't as severe. Also when drifting, aka letting the vehicle decelerate, the issue goes away. Has anyone had the same issue with the 2016 8 speed? Any solutions? I'd like to have an idea of what the problem is before going to the dealership tomorrow. I bet $100 they'll tell me it's the tires.... Thanks for input, JK29
  13. I Purchased my 2015 silverado z71 crew cab a couple months ago, so far i love the truck accept for one issue that shows itself every once in a while. USUALLY while turning and acceleration lightly at the same time ( lugging the motor pretty much) ill get a very noticable shudder right before the truck FINALLY decides to downshift. Has anyone had a similar issue. Im going to drives my buddies sierra tomorrow and see if i get the same shudder. I have 3600 miles on this truck so i dont think its anything to do with the "adaptive" transmission learning cycle. Ive heard a custom tune can resolve issues but i really hate to do that on this new of a truck, nor do i have anywhere within 400 miles to get it done. New to the forum guys, hope to get some responses, this is my first GM product. Switched from a 2008 tundra with 245000 trouble free miles. Hope i dont regret this purchase
  14. Looks like the Blue Oval is having problems with the little turbo V-6. So much so, that there is a class action law suit in the works and a few Facebook pages dedicated to the problem. http://www.businesswire.com/news/home/20130219006852/en/Hagens-Berman-Lawsuit-Ford-F150-Safety-Defect https://www.facebook.com/pages/Ford-F150-Problems-and-what-is-Ford-Motor-Company-doing-about-it/295456413868313
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