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Chevy Silverado and GMC Sierra Transmission Problems
1489 messages, Last post on May 23, 2013 at 1:03 PM
You are in the Chevrolet Silverado & GMC Sierra Forum.- Your Host is kcram
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
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#1480 of 1489 Re: 2010 silverado trans problems [battlefield11] by chuck1
May 01, 2013 (8:29 pm)
Replying to: battlefield11 (Jul 26, 2011 7:33 am)
The transmission issue is normal. The dashboard going out is not. The six speed transmissions are not the most smooth shifting transmission. However, this hasn't affected reliability.
#1481 of 1489 Re: Transmission/Electrical 2000 Chevrolet 1500 Silverado 4WD [ashleg] by dthatcher
May 02, 2013 (6:19 am)
Replying to: ashleg (Apr 29, 2013 1:21 pm)
First of all a 13 years truck having a tranny problem can't be uncommon.t Try having a 2011 (with only 25K) with a tranny problem like I had!!!l It's obvious whoever you have been using don"t have a clue no matter how hard they try. Some times you have to bite the bullet and take it to a dealer an bent over a little to find out what's going on ( can't believe I'm saying this). Your now out 1400 dollars and it sounds like your in worse shape. My suggestion is have a dealer or some other transmission specialist take a look since it's sounds like you have been taking it to Mom and Pop shops. Trying to save money by going here and there usually back fires ( especially on big items like a tranny) I feel your pain but it sounds like a total replacement that comes with a warranty is needed to take care of this matter once and for all.
#1482 of 1489 Trans design is junk by jjacks
May 15, 2013 (10:07 pm)
FYI, anyone reading this should go back and look at my experiences with this problem. A GM area rep of 20 something years was fired over my deal. GM gave me 3500 (if i recall correctly) to trade in my '11 to get a '12. Some of the problems the '11 had (the vibrations and the rear gear whine) are not present in the '12, but I'm here to tell you that the 6 speed trans has fatal design flaws that WILL ALWAYS MAKE IT SHIFT LIKE SH!T. They are sprag-less, they have clutch-to-clutch shifting, and the electronics are lacking. Downshifts involve precise timing of clutch packs releasing while others engage (as do upshifts although there is enough slippage to mask the 'jerkiness'). This is done with solenoids re-directing trans fluid. The problem is that the transmission doesn't know when one clutch pack is fully released before another is engaged, thus there is 'overlap' of two gears trying to be engaged at the same time....hence the jerky, lunging, speed-up feel. When the viscosity of the fluid is thicker, ie when it is colder, the transmission will act more stupid because the rate at which the fluid evacuates the clutch packs is slower....which means another pack is engaging when the other is still engaged to some extent.As far as the gear searching at 45, or any other speed for the matter, that is a product of programming. Contrary to what they will tell you, the transmission doesn't 'learn' anything. That irritates the fire out of me. The transmission selects outcomes from a preprogrammed set of input data......your driving style hasn't got squat to do with junk driving characteristics of the transmission.
The transmissions can't be fixed. It can be 'helped' a bit with programming. The only thing that will fix this transmission is an internal re-design of the hard parts.
And fyi, the 6 speed does not get any better gas mileage than the 4 speed. If anything, it's worse.
- chuck1 (May 17, 2013 4:20 pm)
- bigman55434 (May 23, 2013 10:51 am)
Replies to this message:
#1483 of 1489 2012 chevy silverado, 1500 by rchs1958
May 16, 2013 (5:30 am)
hello, my truck when you slow down to turn, around 10 mph, then step on the gas, it feels like the transaxle, hits hard, is this caused by the transmission shift patterns, the dealer says, it is learning , my driving patterns, Really at 10,000 miles, is this a programing issue, the engine is a 4.3 it up shifts and down shifts great, just annoying to turn and stepping on the gas, worried this is going to affect u joints or the rear end#1484 of 1489 Re: Trans design is junk [jjacks] by chuck1
May 17, 2013 (4:20 pm)
Replying to: jjacks (May 15, 2013 10:07 pm)
Put Amsoil transmission fluid in (better cold performance) and buy one of these- www.rangetechnology.com
The AFM is part of the reason for the jerks. Get the one that will keep it in V8 mode.
It will make your truck more pleasant to drive.
#1486 of 1489 2005 GMC 1500 Parking problems by bim38
May 13, 2013 (11:26 am)
At times it is very difficult to put my truck in "Park". Its seems like the vehicle has to drift an inch or two before I can put it in "Park". I'd like to see if anybody else had this problem. I haven't tried replacing anything yet. Could it be the neutral safety switch or the parking pin in the tranny?#1488 of 1489 Re: Trans design is junk [jjacks] by bigman55434
May 23, 2013 (10:51 am)
Replying to: jjacks (May 15, 2013 10:07 pm)
Apparently my last post with one swear word in it was too much for the moderator, and my post got deleted. Sorry for being too "descriptive" of what I think of GM transmissions. Anyway, I will reiterate what jjacks says. I think he is spot on. On top of all the jerkiness, I have experienced situations where the transmission on my 2011 Sierra 1500 failed to upshift from 1st to 2nd, and then slammed into 3rd. I am also convinced all the programming to manage torque (aka torque management) makes overall driveability worse, because it affects both the transmission and the throttle input (regardless of what my right foot is telling the engine to do). I will gladly take a pre-2007 GM truck over anything made today. I have 1200 miles on my 2013 Sierra 1500 now, and aside from the axle bearing GM forgot to install in the right front axle, which destroyed the axle, axle tube, and seal, my drivers side door panel squeaks and creaks every time I touch it. There is also some weird harmonic when I turn at more than 20mph (like an exit ramp). I think quality control has gone way down as well as the engineering. GM better get its act together soon.
#1489 of 1489 Re: Let's reel it in just a tad, please [kcram] by dthatcher
May 23, 2013 (1:03 pm)
Replying to: kcram (May 26, 2011 7:45 pm)
You buy a 40K plus truck and it does get personal when you can't get it fixed!!!!
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