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By Big R ED
Patient - 2019 1500 LD, 5.3, 6 sp, 7200 miles old, Covid-19 negative. Symptoms - 2-3 second shutter / shake / rumble, during light acceleration, 30-40 MPH and low RPM. Happens while both in V4 mode and while in v8 (manual w/ transmission set to L5). I thinks its the torque converter, but surfing the forum I see this issue mainly referenced to 2015+/- K2s and I'm not sure if they changed the trans in the final years. I'd appreciate either a TSB # or a link to another posting were I could find the TSB. I'd like to be able to take to my dealer and say "HERE....READ....FIX" (politely). Many thanks!
By Mallery O'Hara
After many many hours of forum reading and trying to find a answer for a problem like mine I've finally given up and decided to just ask.
I've got a 2001 Silverado 1500 LS 2wd with the 5.3L. We were driving down a back road the other day and to simply say that it was muddy would be a huge understatement. Had I not know better I wouldn't have believed it was an actual road and not a trail. The mud was so deep that it reached clay in spots and we basically snowplowed mud with the front bumper. After making it back to the highway we went to go accelerate only to be bounced around wildly and were unable to go much faster than 80km/h due to a random and sudden lack of 3rd gear and overdrive. Limped the truck home and did a transmission fluid and filter change the next day. Fluid was filthier than heck, dark dark brown in color sort of like Cola. After that now the truck sometimes finds 3rd but 4th is nowhere to be found and once you get over about 70km/h it shakes so hard it feels like the worst washboard despite doing our best to get all the mud out of the wheels. Reverse still works fine. Looked under the truck and there does appear to be a bent crossmember but the frame still looks fine and straight.
Some backstory; Never had any transmission problems before this or signs of slipping. The tires on the truck are oversized, from a stock 245/75r16 to running 275/70r17. At present there are no rear brakes, had a bolt on the caliper come off one day and long story short ended up disconnecting them and pinching off the lines for the back brakes. We also have kids who like to play driving and occasionally jerk on the shifter, one day our toddler somehow manged to get the truck out of drive without hitting the brake and it started rolling, it didn't go very far before I stopped it but nevertheless was certainly surprising.
So my question is; what could be causing this to happen? Is the transmission completely gone and if so why no warning signs? Could it be the 3/4 clutch pack, the shift cable, transmission mounts or something else? Any input would be appreciated!
2019 Silverado 1500 z71 with 8K miles, 3.23 rear, 8 speed.
Today I have towed about 8000lbs of cattle and trailer. I prior towed an old farmall tractor back.
Both times when towing over 6000lbs, I had the transmission in L6, tow haul mode. Sometimes when taking off from a stop, it almost felt like the truck started in 2nd, not dropping down the first. Would it do that? Or is the torque converter just being floated as RPM's rise, and possibly I am not feeling the shift from 1 to 2. This transmission is crazy smooth compared to my 6 speed.
Truck drives great otherwise. Ran it to town empty later, no issues. Even ran it thru the Low mode gears, and it starts in first normally. Thought maybe this was towhaul mode trying to avoid unnecessary shifting if still rolling. Transmission running cool, never over 180 even with that load at 60-70 mph.
Thanks for sharing your experiences.
By Isaac Riffel
So I have this 2000 Silverado with a 4L60E auto transmission. It’s got over 200k miles. The 4.3 v6 engine runs great, but half of the time the transmission will barely move the truck. (This is a standard cab 2wd version.) if I’m stopped and I put it in reverse I have to give it a really heavy push on the gas to get it to move.. but on the other side of the coin it will work fine sometimes. The transmission will search aimlessly for a gear but works fine once it finds one. Some days it won’t go over 30mph and other days it works just fine. Could I just have a bad filter or something or do I need a new transmission? Thanks!
By Elaine Clements Finn
Got a 1993 G20 Chevy Sports Van. She's a 5.7 V8 704r. So this was part of the seller's inheritance. She sat for almost one year and prior to owners death, had no Transmission issues. She drives in Neutral and has 0 ZERO Reverse. Like no bucking or any other sensation when it's in reverse. Her trans fluid was dark. I had all fluids changed today and asked the mechanic what he found in the transmission pan. He said there were a few shavings and the fluid was dark but that was it. He told me he was no Transmission guy but really felt like I did not have a transmission problem. The car acts like it has no reverse at all. I was told by a transmission guy to Rev it up a bit after warming it up. If the front clutch in the transmission is stuck together, I should feel it buck like it wants to go into reverse but it can't. I GOT nothing in reverse period. It drives in Neutral which the mechanics that did the fluid changes said they have never seen. Sooooo...do I have a transmission problem, a shift solenoid problem, some sort of cable that's come undone....detent, TV ? My fear is that this is something less expensive than a transmission rebuild and I don't know enough to know what it is ? What do you guys think ? For the record....after all the fluids were changed, it drove like a million bucks !
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