Jump to content

Search the Community

Showing results for tags 'Transmission shuddering'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • GM-Trucks.com Original News & Product Reviews
    • General Motors Product and Industry News
    • The GM-Trucks.com Garage - Vehicle Testing & Product Reviews
    • The Newsroom Archive
    • The Garage Archive
  • Next-Generation 2026 Chevrolet Silverado & GMC Sierra Speculation & Rumors
    • 2026 Chevrolet Silverado & GMC Sierra
  • 2022-2026 Ultium Electric Vehicle Forums
    • 2022-2025 GMC HUMMER EV Pickup & SUV Forum
    • 2024-2025 Chevy Silverado EV & GMC Sierra EV Forum
  • 2019-2025 Chevy Silverado & GMC Sierra Forums - T1XX Platform
    • 2019-2025 Silverado & Sierra
    • 2020-2024 Silverado HD & Sierra HD
    • 2021-2025 Tahoe, Suburban, Yukon, Yukon XL & Escalade
  • 2014-2019 Chevy Silverado & GMC Sierra Forums - K2XX Platform
    • 2014 - 2019 Silverado & Sierra
    • 2015-2020 Suburban/Tahoe & Yukon/Yukon Denali
    • 2015-2019 Silverado HD & Sierra HD
  • 1999-2013 Chevy Silverado & GMC Sierra Forums - GMT-800 & GMT-900 Platforms
    • 1999-2013 Silverado & Sierra 1500
    • 2000-2014 Silverado & Sierra HD
  • Chevy Colorado & GMC Canyon Forums
    • 2023-2024 Chevy Colorado & GMC Canyon Forum
    • 2015-2022 Colorado & Canyon
    • 2005-2012 Chevy Colorado & GMC Canyon
  • Chevrolet / GMC / Buick / Cadillac Crossover & SUV Forums
    • 2024 Chevrolet Traverse, GMC Acadia & 2025 Buick Enclave
    • 2017-2023 Traverse, Acadia, Enclave & XT5
    • 2025 Chevrolet Equinox & GMC Terrain Forum
    • 2019 - 2024 Blazer
  • Classic Chevrolet & GMC Pickup Truck Forums
    • 1988-1999 Chevrolet & GMC C/K GMT400 Platform
    • 1973-1987 Chevrolet & GMC Square Body / Rounded Line Pickups
    • 1967-1972 Chevrolet & GMC Glamour / Action Line Pickups
    • 1960-1966 Chevrolet C/K/Apache & GMC 1000-3000 Pickups
    • 1982-2005 Chevrolet S-10/Blazer & GMC S15/Sonoma/Jimmy
    • 1969-1994 Chevrolet K5 Blazer & GMC Fullsize Jimmy
  • Silverado, Sierra, Trucks, Parts & Accessories For Sale
    • For Sale/Wanted
    • Member & Vendor Rating Forum
    • Member Product Reviews
  • The Lounge
    • Off-Topic
    • Future Vehicle Speculation & Spy Shots
    • Automotive Industry & Market Discussion
    • New Member Introductions
    • Meetups, Events, & Gatherings
    • GM-Trucks.com Comment Box
  • Hobbies & Lifestyle
    • Photography
    • Major League Sports, Outdoor Recreation, Firearms, Hunting, OHRV
    • Racing, Strip, & Track
    • Trailers, Hitches, & Towing
    • Garage & Home, Snow Plowing, Landscaping, & Lawn Care
    • Technology, Devices, & Gaming
    • Vehicle Buying, Financing, Incentives, & GM Card
    • Vehicle Builds
  • Technical & Advanced
    • Vehicle Appearance, Care, & Maintenance
    • Ask the GM Technician
    • Performance Engine Tuning
    • Transmission, Suspension, Transfer Case, & Axles
    • Wheels, Tires, & TPMS
    • Audio, Electronics, OnStar, MyLink, Intellilink & SiriusXM
    • How-To
  • Commercial Vehicles
    • 1980-2009 Chevrolet Kodiak and GMC Topkick
    • Chevrolet Express & GMC Savana
    • Chevrolet Silverado Chassis Cab 4500HD/5500HD/6500HD
  • Black Truck Club's Topics
  • Texas Owner's Group's Topics
  • California Owner's Group's Topics
  • New England Owner's Group's Topics
  • Midwest Owner's Group's Topics
  • South Carolina Silverado Owners's Topics
  • Canadian Owners Club's Topics
  • SCUBA divers of GM-Trucks's Scuba Talk
  • Red Truck Club's Topics
  • Idaho Sierra & Silverado Owners Club's Idaho
  • Colorado Trucks's Exhaust Setups
  • Colorado Trucks's Pics of trucks
  • SEO Paint's seo color ordered
  • NorthSky Blue Club's NorthSky Blue Metallic
  • NorthSky Blue Club's Pics
  • diesel 3.0's Topics
  • MIAMI TRUCK LOVERS's YOUR FAVORITE CHERVROLET MOD?

Calendars

  • Events
  • Birthdays
  • Texas Owner's Group's Events
  • California Owner's Group's Events
  • Midwest Owner's Group's Events
  • Red Truck Club's Events

Categories

  • Articles
  • News
  • Reviews
    • Project Sierra
  • Resources

Categories

  • RPO

Product Groups

  • Premium Memberships

Blogs

There are no results to display.

There are no results to display.


Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


MSN


Website URL


Yahoo


Skype


Facebook


Twitter


Name


Location


Interests


Drives

Found 2 results

  1. It started the day before Christmas Eve - noticeable but minor rpm fluctuations (a few hundred rpms) while driving on the highway after being warmed up. About 5 minutes later, I felt the truck stuttering under light loading moving ~60mph - engine rpms below 1500. I checked the fluid and it was perhaps a tad low (very bottom of 'hot' zone) but was definitely not red/pink. I'm not sure if the previous owner had changed the fluid or not, but it didn't seem it. Over the next day, the shuddering got worse and entirely repeatable. Once the transmission fluid was warm, it would reliably shudder under light loading at slow highway speeds. Occasionally I could get it to do it on a hill at slower speeds too. It never happens under aggressive acceleration/heavy engine loading - this seems to work fine with no issues. I scheduled an appointment at the dealer for next Tuesday, the soonest they had available. In the mean time, I'm hoping to make sure I'm going down the right path and understand my best options. I found PIP5504 (attached) and related Torque Converter Diagnosis SI (attached) and tried to work through them as best as possible without the specialty GM tools. Diagnostics Occurs most obviously when transmission fluid is warm-hot Occurs in M5 mode as well as Drive Occurs both when in V8 and V4 (with and without AFM) Occurs with and without Tow/Haul Mode enabled Occurs with and without grade braking disabled Occurs under light load conditions Does not occur under heavy load conditions Using torque app, a couple misfires (less than 20 after an hour of driving, distributed across all cylinders) are noted, but the instances do not remotely line up with when problems are seen. Using torque app, spikes of TC slip is observed. Using torque app, RPMs go UP when TC slip is observed - these so probably not a misfire Working through the PIP, the symptoms seem to indicate either 1 (fishbite) or 2 (Torque Converter Shudder). I'm not entirely sure what fishbite is, but the service procedures are more or less similar. I don't have a GDS2 tool to command TC engagement, unfortunately, so hopefully the dealer is willing to do this properly. The original PIP5504 (not the C revision) had service procedures included that all seemed to point back to a fluid flush or replacing the torque converter. Knowing that my fluid was pretty black (didn't smell burnt though), I went ahead and got a new transmission filter and performed a fluid flush. 20 Quarts of Valvoline MaxLife fluid were flushed through (not here to debate fluid brands/types - it works with Dex VI and it's what was in stock at the store open on Christmas Eve). Observations Fluid was black Transmission pan magnet had fine metal debris (felt smooth between fingers) on it Photo included - what is a lot? Truck has 178,000 miles on it, this is probably the first time it was opened. One small piece of flexible (rubber?) debris in pan Flow through and out of cooler seemed OK from the start No signs of leaks Changes after Flush Shuddering is much reduced - but still faintly there. Doesn't feel like truck is going to come apart though. RPM fluctuations are still there - and perhaps more noticeable than before (probably because the shudder isn't overshadowing them). Using torque app, Torque Converter Slip is still present when RPMs fluctuate. It appears there is no change to the frequency or amplitude of slip. Questions For those familiar, does the amount of metal on the magnet look typical, or does this look like a sign of an internal failure? Any other ideas for what the issue could be? Any other diagnostic tests that would be helpful to zero in on the root cause? The PIP points to replacing the torque converter as the next step. Is there any way that with all this identified, the transmission itself could be the culprit? Living in MA in the winter without a garage, I'm almost certainly going to have to have the shop perform any replacements and don't want to pay for labor twice. If so, thoughts on a reman unit vs. having a shop repair it? I'm well outside of any warranty and see a lot of people going back and forth with the dealers while they throw parts at a problem. Any tips for reducing bad service and getting it right the first time with them? Am I doing more damage if I keep driving on it for the next week? I'm open to thoughts/suggestions at identifying the cause and next steps. Vehicle Information 2016 Silverado 1500 LT Z71 4x4 6-speed auto (6L80, MYC) 5.3L V8 178,000 miles NOT tuned in any way Daily Driver - mostly highway miles Used for occasional light towing (~12,000 miles spent towing an 850 pound teardrop trailer) Generally driven gently (boring, I know) Thanks, -Sean MC-10118277-9999.pdf PIP5504C.pdf Torque Converter Diagnosis SI.pdf
  2. Just got the 2014 Silverado 5.3l 4x4 back from the dealership from having the entire top end of the engine replaced ($9000+) at 106,000 miles. Noticed oil on the plugs & immediately started smoking. But NOW - 5 days later, the truck shudders at 35-50 mph, especially if going uphill at a low speed. Does anyone have any suggestions for what this is due to or how to correct it - preferably without spending another $5-10k. This was a great truck up to 100k miles, but now it seems to be falling apart. Put a Hypertech programmer on it in late 2017/early 2018 to turn off the afv, (at about 70k miles & that's all I used it for), hoping to avoid the problems that causes, but no luck. Now this transmission thing is happening. It used to shift hard at low speed & when cold, but this shuddering is new.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.