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Chevy Silverado and GMC Sierra Transmission Problems

506 messages,  Last post on Dec 01, 2009 at 1:57 PM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck

#377 of 506 2004 silverado 4th gear problems by geez150 Dec 26, 2008 (8:59 am)
My 2004 chevy silverado 5.3 4x4 is having tranny trouble. After the tranny shifts into 4th gear and i'm doing about 40-55mph and in the rpm range of 1500-1800 it starts bucking bad. If i either speed up to say 60 it goes away or if i slow down it goes away. The STEALER has no clue! Any help would be great!
#378 of 506 tranny clunking by freewheelin1 Jan 03, 2009 (2:28 pm)
When I accelerate from a red light sometimes i hear a clunking from the tranny going into second gear and less so into third. I thought i read somewhere that the gear changing in Sierra's are noisy.... is this the case or should i consult someone that the tranny might be going.... I JUST bought it ...an 05 GMC Sierra 4x4 34,796 miles. It seems to occur more often when i accelerate a bit harder.
#379 of 506 2001 2500 4L80E shifting problem by bluedroptop Jan 03, 2009 (8:04 pm)
When the trans. temp. is between 100 and 150 degrees, the trans. shifts hard from 1st to 2nd. This isn't a constant problem, just occasional. Otherwise the trans. works fine. Any suggestion as to what is causing this problem, or remedies. Any info will be helpful.   Thanks, bluedroptop
#380 of 506 update on 2004 by geez150 Jan 04, 2009 (5:02 pm)
update on my 2004 chevy silverado 5.3 4x4 with 31,000 on it, picking it up for the stealer tomorrow, they replaced the torque converter on it, so hopefully the problem will be gone
#381 of 506 1999 gmc sierra 2500 no reverse when trans is hot by GMCATW Jan 10, 2009 (6:48 pm)
1999 GMC Sierra 2500 4x4 Hi.. Does any body have any idea about my transmission. I do snow plowing and after couple of hours of driving back and forth, my truck wont go in reverse for some reason so i have to park the truck for 15 minutes to cool down it works fine after that, any ideas guys. Thanks
#382 of 506 2008 GMC 1500 Transmission Problems by pkbroiler Jan 13, 2009 (7:51 am)
I have a 2008 GMC 5.3 Auto ( 12,000 miles) with a front seal leaking. Took it to my dealer for a warranty repair. Seal was replaced and I had the truck back in a day. 3 to 4 days later the transmission just quit working going down the road . No nothing. GM roadside assistance towed it to my dealer and they determined the torque converter and a pump needs to be replaced. How long does it take a dealer to get the parts and what may have happened? Transmission worked fine till the front seal was replaced. Dealers answers seem funky to me. I just need some thoughts and other ideas from people.
#383 of 506 2008 gmc sierra transmission issues by pondrocker Jan 13, 2009 (11:40 am)
Hello, need some advice on a 2008 GMC 5.3 4 speed auto, 4x4 Z71 pkg. I am experiencing the same issue as user name Frock10 post # 332. My first incident happened at 3,000 miles, they replaced the 3-4 clutch pack with one that had tighter clearances per an internal bulliten that the mechanics are unable to see, sorta scary. 2 different gm service dept. referenced the internal bulliten, both said it wasnt the usual 2-3 clunk. The mechanic I chose has 35 years experience and I have used this service dept for years and never had an issue/ flawless service. After the repair the tranny was great, even better than before the fix probably due to tighter clearances. The fix failed 575 miles later, it is better due to different clearances but there non the less. Brought it back angry and concerned and they slapped a 2-3 cluck bullitin on it and told me I have a warranty just drive it. The truck is now black listed & I am being denied service if I even mention the word tranny. 4,100 miles on it now, cant even get it fixed myself without voiding the warranty. Something is fishy here and not right, any suggestions and solutions would be greatly appreciated. Also does anyone know how I can get in contact with user name fronk10?
#384 of 506 06 gmc sierra transmission problems by judice3 Jan 08, 2009 (3:33 pm)
#385 of 506 06 gmc sierra transmission problems by judice3 Jan 08, 2009 (3:33 pm)
I noticed that my trans. is leaking at the end were it meets the shaft. I checked my fluid levels and it looked fine. When i press the gas I take off normally, but if I let off of the gas i slow down abruptly. I contributed this to not letting my engine warm up enough, because when warmed up it acts normal. Any ideas?
#386 of 506 Start in 3rd gear by byancey Jan 13, 2009 (5:24 pm)
Just took my 2004 GMC 5.3/Z71 to trans shop because it was starting off in 3rd gear, and wouldn't downshift. Turn it off, restart, no problem. Showed trouble code (not sure which one), and mechanic said might be short in harness from computer/transmission. Checked solenoids and all were ok.   Anyone else have this? Thanks BY Replies to this message: byancey (Feb 08, 2009 5:36 am)

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